CN217440920U - Single-action pneumatic actuator - Google Patents

Abstract

The utility model discloses a single-action pneumatic actuator, the power distribution cylinder comprises a cylinder body, it is connected with the gear shaft to rotate in the cylinder body, the both sides of gear shaft have left piston and right piston to mesh respectively, left piston and right piston and cylinder body inner wall movive seal are connected, left piston and right piston divide into the left cavity of arranging in proper order with the cylinder body in, well cavity and right cavity, be equipped with first air flue and second air flue on the cylinder body, first air flue and left cavity and right cavity intercommunication, second air flue and well cavity intercommunication, be equipped with the elasticity direction subassembly between the end cover of cylinder body and left piston and the right piston, the second air flue admits air and promotes left piston and right piston and move and compress the elasticity direction subassembly to the outside, the air in left cavity and the right cavity is discharged from first air flue, the second air flue is disconnected, the elasticity direction subassembly promotes left piston and right piston and resets. The utility model discloses single-action pneumatic actuator can realize the single-action motion, through elasticity direction subassembly automatic re-setting, simple structure, and the moment of production is more stable, improves factor of safety.

Description

Single-action pneumatic actuator

Technical Field

The utility model relates to a pneumatic actuator field especially relates to a single-action 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. The actuating mechanism and the adjusting mechanism of the pneumatic actuator are a unified whole, and the actuating mechanism comprises a film type, a piston type, a shifting fork type and a gear-rack type. The piston type stroke is long, and the piston type thrust mechanism is suitable for occasions requiring large thrust; the diaphragm type stroke is small, and the valve rod can only be directly driven. The shifting fork type pneumatic actuator has the characteristics of large torque, small space, more accordance with a torque curve of a valve and the like. However, the bottom of the existing shifting fork type pneumatic actuator is generally additionally provided with a clutch type hand wheel mechanism, so that the existing shifting fork type pneumatic actuator occupies large space, is heavy in weight and is high in cost.

Disclosure of Invention

The utility model discloses the main technical problem who solves provides a single action pneumatic actuator, can realize the single action motion, through elastic guide subassembly automatic re-setting, simple structure, the moment of production is more stable, improves factor of safety.

In order to solve the technical problem, the utility model discloses a technical scheme be: provides a single-action pneumatic actuator, which comprises a cylinder body, a gear shaft is rotationally connected in the cylinder body, the two sides of the gear shaft are respectively engaged with a left piston and a right piston which are connected with the inner wall of the cylinder body in a dynamic sealing way, the left piston and the right piston divide the cylinder body into a left cavity, a middle cavity and a right cavity which are arranged in sequence, the cylinder body is provided with a first air passage and a second air passage, the first air passage is communicated with the left cavity and the right cavity, the second air passage is communicated with the middle cavity, an elastic guide assembly is arranged between the end cover of the cylinder body and the left piston and between the end cover of the cylinder body and the right piston, the second air passage is used for air inflow to push the left piston and the right piston to move outwards and compress the elastic guide assembly, air in the left cavity and the right cavity is discharged from the first air passage, the second air passage is cut off, and the elastic guide assembly pushes the left piston and the right piston to reset.

In a preferred embodiment of the present invention, the elastic guide assembly includes a first spring seat and a second spring seat which are oppositely disposed, the outer side of the first spring seat and the outer side of the second spring seat are sleeved with a spring, and a guide post is movably disposed between the first spring seat and the second spring seat.

In a preferred embodiment of the present invention, a plurality of mounting holes are uniformly formed in the first spring seat and the second spring seat along the circumferential direction, and both ends of the spring are connected in the mounting holes in a matching manner.

In a preferred embodiment of the present invention, the first spring seat is provided on an end cap of the cylinder body, and the second spring seat is provided on an outer side of the left piston or the right piston.

In a preferred embodiment of the present invention, the left piston and the right piston have racks on the inner side and a plurality of baffles on the outer side, and the space formed by the baffles and the inner wall of the cylinder body is a middle cavity.

In a preferred embodiment of the present invention, the baffles are uniformly distributed along the outer sides of the left piston and the right piston to form an arc-shaped area, and the arc-shaped area is communicated with the second air passage.

In a preferred embodiment of the present invention, the gear shaft is sleeved with an adjusting plate, the cylinder body is mounted with an adjusting bolt, and a front end of the adjusting bolt extends into the cylinder body and contacts with the adjusting plate to adjust a rotation angle of the gear shaft.

The utility model has the advantages that: in the single-action pneumatic actuator, the second air passage leads the high-pressure air source into the middle cavity, so that the left piston and the right piston extend outwards; the high-pressure air source stops supplying, under the action of the elastic guide assembly, the left piston and the right piston are automatically reset under the action of elastic force, single-action output is realized, and the rotation angle of the gear shaft is 90 degrees.

The utility model discloses single-action pneumatic actuator provides different torque data scope through many springs on the elasticity direction subassembly, further improves factor of safety, ensures stable in structure reliably.

The utility model discloses single-action pneumatic actuator, cavity in baffle and the cylinder body formation through left piston and right piston, cavity in the high-pressure gas entering of second air flue, through the baffle dispersion for the power of gas action on the baffle is more even stable, ensures that left piston and right piston stretch out the in-process more steadily.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic structural view of a preferred embodiment of the single-acting pneumatic actuator of the present invention;

FIG. 2 is a schematic perspective view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a cross-sectional view of FIG. 2;

FIG. 5 is a partial schematic view of the internal structure of FIG. 2;

the parts in the drawings are numbered as follows: 1. the piston type hydraulic cylinder comprises a cylinder body, 11, a left cavity, 12, a middle cavity, 13, a right cavity, 14, a first air passage, 15, a second air passage, 2, a gear shaft, 3, a left piston, 31, a rack, 32, a baffle, 4, a right piston, 5, an elastic guide assembly, 51, a first spring seat, 52, a second spring seat, 53, a spring, 54, a guide column, 55, a mounting hole, 6, an adjusting disc, 7 and an adjusting bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. The structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1 to 5, a single-acting pneumatic actuator includes a cylinder 1, a gear shaft 2 rotatably connected to the cylinder 1, a left piston 3 and a right piston 4 respectively engaged to two sides of the gear shaft 2, and the left piston 3 and the right piston 4 are connected to an inner wall of the cylinder 1 in a dynamic sealing manner. The left piston 3 and the right piston 4 are subjected to aluminum alloy pressing oxidation or cast steel galvanizing treatment, the mounting positions are symmetrical, the action is rapid, the service life is long, and the direction can be changed by simply reversing the pistons.

The left piston 3 and the right piston 4 divide the interior of the cylinder body 1 into a left cavity 11, a middle cavity 12 and a right cavity 13 which are sequentially arranged. Be equipped with first air flue 14 and second air flue 15 on the cylinder body 1, first air flue 14 and left cavity 11 and right cavity 13 intercommunication, second air flue 15 and well cavity 12 intercommunication. An elastic guide assembly 5 is arranged between the end cover of the cylinder body 1 and the left piston 3 and the right piston 4, and the second air channel 15 enters air to push the left piston 3 and the right piston 4 to move outwards and compress the elastic guide assembly 5.

The left piston 3 and the right piston 4 have a rack 31 on the inner side and a plurality of baffles 32 on the outer side, and the space formed by the baffles 32 and the inner wall of the cylinder 1 is the middle cavity 12. The baffles are uniformly distributed along the outer sides of the left piston 3 and the right piston 4 at intervals to form arc-shaped areas, and the arc-shaped areas are communicated with the second air passage 15. Second air flue 15 and the regional intercommunication of arc, gaseous through baffle 32 homodisperse effect in the inside of left piston and right piston 4, ensure the stable translation of left piston 3 and right piston 4, also guaranteed simultaneously that left piston 3 and right piston 4 and gear shaft 2's meshing structure is stable.

The elastic guide assembly 5 comprises a first spring seat 51 and a second spring seat 52 which are oppositely arranged, a spring 53 is sleeved outside the first spring seat 51 and the second spring seat 52, and a guide column 54 is movably arranged between the first spring seat 51 and the second spring seat 52. A plurality of mounting holes 55 are uniformly formed in the first spring seat 51 and the second spring seat 52 at intervals along the circumferential direction, and two ends of the spring 53 are connected in the mounting holes 55 in a matching manner. A first spring seat 51 is provided on the end cap of the cylinder 1, and a second spring seat 52 is provided on the outer side of the left piston 3 or the right piston 4. The guide post 54 limits the position between the first spring seat 51 and the second spring seat 52, and prevents the first spring seat and the second spring seat from colliding with each other. The number of the springs 53 of each elastic guide component 5 is 6, and the combined prepressing assembly is performed through plating treatment, so that the disassembly is simple and safe. The anti-corrosion single-action actuator has strong corrosion resistance and long service life, can safely and simply disassemble the single-action actuator, and meets different torque output ranges by changing the number of the springs 53.

Air in the left cavity 11 and the right cavity 13 is exhausted from the first air passage 14, the second air passage 15 is cut off, and the elastic guide assembly 5 pushes the left piston 3 and the right piston 4 to reset. When the air source pressure enters the middle cavity 12 from the second air passage 15, the air pressure pushes the left piston 3 and the right piston 4 to move outwards, meanwhile, the spring 53 starts to be compressed, and the air in the left cavity 11 and the right cavity 13 is discharged through the first air passage 14 until the gear shaft rotates to the limit position (rotates 90 degrees anticlockwise). The air supply is cut off, under the elastic force of the spring 53, the spring 53 pushes the left piston 3 and the right piston 4 to move inwards to reset, the gear shaft synchronously rotates to reset, and the state is closed at the moment.

The gear shaft is sleeved with an adjusting disk 6, the cylinder body 1 is provided with an adjusting bolt 7, and the front end of the adjusting bolt 7 extends into the cylinder body 1 and is in contact with the adjusting disk 6 to adjust the rotation angle of the gear shaft. Through the cooperation of adjusting bolt 7 and adjusting disk 6, can realize the independent stroke control in left and right sides.

Be different from prior art, the utility model discloses single-action pneumatic actuator can realize the single-action motion, through elastic guide subassembly automatic re-setting, simple structure, and the moment of production is more stable, improves factor of safety.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (7)

1. A single-action pneumatic actuator comprises a cylinder body, a gear shaft is rotationally connected in the cylinder body, the two sides of the gear shaft are respectively engaged with a left piston and a right piston which are connected with the inner wall of the cylinder body in a dynamic sealing way, it is characterized in that the left piston and the right piston divide the cylinder body into a left cavity, a middle cavity and a right cavity which are arranged in sequence, the cylinder body is provided with a first air passage and a second air passage, the first air passage is communicated with the left cavity and the right cavity, the second air passage is communicated with the middle cavity, an elastic guide assembly is arranged between the end cover of the cylinder body and the left piston and between the end cover of the cylinder body and the right piston, the second air passage is used for air inflow to push the left piston and the right piston to move outwards and compress the elastic guide assembly, air in the left cavity and the right cavity is discharged from the first air passage, the second air passage is cut off, and the elastic guide assembly pushes the left piston and the right piston to reset.

2. The single-acting pneumatic actuator of claim 1, wherein the resilient guide assembly comprises a first spring seat and a second spring seat which are arranged oppositely, a spring is sleeved outside the first spring seat and the second spring seat, and a guide post is movably arranged between the first spring seat and the second spring seat.

3. The single-acting pneumatic actuator as claimed in claim 2, wherein the first spring seat and the second spring seat have a plurality of mounting holes formed therein at regular intervals in the circumferential direction, and both ends of the spring are connected to the mounting holes in a fitting manner.

4. The single acting pneumatic actuator of claim 3, wherein the first spring seat is provided on an end cap of the cylinder and the second spring seat is provided on an outer side of the left or right piston.

5. The single-acting pneumatic actuator of claim 1, wherein the left and right pistons have racks on the inside and a plurality of baffles on the outside, and the space formed by the baffles and the inner wall of the cylinder is a middle cavity.

6. The single-acting pneumatic actuator of claim 5, wherein the baffles are evenly spaced along the outside of the left and right pistons to form arcuate regions that communicate with the second air passage.

7. The single-acting pneumatic actuator as claimed in any one of claims 1 to 5, wherein the gear shaft is sleeved with an adjusting plate, the cylinder block is provided with an adjusting bolt, and a front end of the adjusting bolt extends into the cylinder block and contacts with the adjusting plate to adjust a rotation angle of the gear shaft.

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