CN214466036U

CN214466036U - Pneumatic actuator

Info

Publication number: CN214466036U
Application number: CN202120672762.1U
Authority: CN
Inventors: 郑权峰
Original assignee: Zhejiang Xiafeng Precision Die Casting Co ltd
Current assignee: Zhejiang Xiafeng Precision Die Casting Co ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2021-10-22
Anticipated expiration: 2031-04-01

Abstract

The utility model relates to a pneumatic actuator, apron including casing and casing both sides, the inlet port has all been seted up on the apron, the middle part is equipped with the axostylus axostyle that runs through casing rotation sealing connection in the casing, the axostylus axostyle is located the one end key-type connection of casing has the gear, the equal fixed mounting in the adjacent one side of two pistons has the rack, piston outside cover is equipped with the sealing washer, the sealing washer includes the upper seal circle, lower seal circle and connecting portion, terminal surface protrusion sets up under the lower seal circle, the first annular with lower seal circle looks adaptation is seted up to the junction of piston and sealing washer, the embedded steel ring that is equipped with "the first circular groove" font setting of sealing washer, the steel ring passes through lower seal circle and first circular groove joint, a plurality of through-holes have been seted up on the steel ring, be equipped with the interval between the middle part of steel ring and the concave position of afterbody and the sealing washer. The utility model has the advantages that: the sealing ring is arranged, so that the sealing performance between the piston and the shell is improved, the sealing ring is firm in structure and not easy to fall off, and the service life of the pneumatic actuator is further prolonged.

Description

Pneumatic actuator

Technical Field

The utility model relates to an executor technical field, in particular to pneumatic actuator.

Background

The actuator is an essential important component in an automatic control system, and has the functions of receiving a control signal sent by a controller and changing the size of a controlled medium so as to maintain a controlled variable at a required numerical value or within a certain range, the actuator can be divided into three categories of pneumatic, hydraulic and electric according to the energy form, the pneumatic actuator uses compressed air as an energy source, and the actuator is characterized by simple structure, reliable and stable action, large output thrust, convenient maintenance, fire and explosion prevention and low price, so that the actuator is widely applied to the production processes of chemical engineering, paper making, oil refining and the like, and can be conveniently matched with a passive instrument for use. .

In the prior art, most of pneumatic actuators have poor sealing performance, and the situation of air leakage is easy to occur at the position of a piston after the pneumatic actuator is used for a period of time, so that the use of the whole pneumatic actuator is possibly influenced finally.

SUMMERY OF THE UTILITY MODEL

To the deficiency that prior art exists, the utility model aims to provide a pneumatic actuator.

The technical scheme of the utility model is realized like this: a pneumatic actuator comprises a shell and cover plates on two sides of the shell, wherein the cover plates are respectively provided with an air inlet, the middle part in the shell is provided with a shaft lever which penetrates through the shell and is connected with the shell in a rotating and sealing way, one end of the shaft lever positioned in the shell is connected with a gear in a key way, two sides of the shaft lever are provided with pistons inserted in the shell, one side of each of the two pistons adjacent to each other is fixedly provided with a rack, the two racks are respectively positioned on the upper side and the lower side of the gear and are meshed with the gear, the outer side of the piston is sleeved with a sealing ring which is arranged in a U shape and comprises an upper sealing ring, the piston is provided with a first annular groove matched with the lower sealing ring, a steel ring arranged in a shape like a Chinese character '+' is embedded in the sealing ring, the steel ring is connected with the first annular groove in a clamping mode through the lower sealing ring, a plurality of through holes are formed in the steel ring, and a space is formed between the concave part of the middle part and the tail part of the steel ring and the sealing ring.

Through adopting the above technical scheme, the upper seal circle, the bottom suspension sealing washer, the very big structural strength who has promoted the sealing washer that sets up of integrated into one piece's connecting portion and steel ring, the setting of first annular and inlay and establish in the sealing washer, the steel ring through bottom suspension sealing washer and first annular joint has further improved the joint strength of sealing washer and piston, the life of sealing washer has been prolonged, sealing effect has been improved, when letting in gas drive axostylus axostyle and rotating in the casing, high-pressure gas passes through the through-hole on the steel ring and gets into to the clearance between steel ring and the sealing washer, make inside receiving the gas compression of sealing washer down with the inseparabler of the inner wall laminating of piston and casing, sealing effect that further improved the sealing washer reduces and reveals, pneumatic actuator's life has been prolonged.

The utility model discloses further set up to: a filter screen is embedded at the opening of the through hole.

Through adopting above-mentioned technical scheme, prevent that the dust from getting into and blockking up the through-hole, influence the ventilation effect of through-hole.

The utility model discloses further set up to: two sets of spring assemblies are arranged on the two pistons respectively, each spring assembly comprises at least two springs, and one end of each spring, which deviates from the corresponding piston, is fixedly connected to the inner wall of the corresponding cover plate.

Through adopting above-mentioned technical scheme, through setting up many with the spring, make the piston more stable when reseing, difficult emergence skew.

The utility model discloses further set up to: the cover plate is fixedly connected with the shell through a plurality of bolts, the connecting part of the cover plate and the shell is arranged in an L shape, a second annular groove is formed in the tangent plane of the cover plate and the shell, and a sealing gasket is adhered in the second annular groove.

Through adopting above-mentioned technical scheme, consolidate through a plurality of bolts, a plurality of second ring grooves and inside seal pad's setting carry out multiple sealed fixed to the apron, have improved the leakproofness between casing and the apron.

The utility model discloses further set up to: the steel ring surface is arranged roughly, and the U-shaped opening of the sealing ring is abutted to the steel ring.

Through adopting above-mentioned technical scheme, improve the frictional force between steel ring and the sealing washer contact surface, reduced the deformation degree of sealing washer when the piston is relative motion with the casing, further promoted the life of sealing washer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 according to these drawings without inventive exercise.

FIG. 1 is a cross-sectional view of a pneumatic actuator according to an embodiment of the present invention;

fig. 2 is a partially enlarged view of a pneumatic actuator a according to an embodiment of the present invention.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 2, the utility model discloses a pneumatic actuator, which comprises a casing 1 and cover plates 101 arranged on two sides of the casing 1, wherein the cover plates 101 are all provided with air inlet holes 102, the middle part in the casing 1 is provided with a shaft lever 2 which penetrates through the casing 1 and is connected with the casing 1 in a rotating and sealing way, one end of the shaft lever 2 in the casing 1 is connected with a gear 3 in a key way, two sides of the shaft lever 2 are provided with pistons 4 inserted in the casing 1, one adjacent sides of the two pistons 4 are fixedly provided with racks 5, the two racks 5 are respectively arranged on the upper and lower sides of the gear 3 and are meshed with the gear 3, the outer side of the piston 4 is sleeved with a sealing ring 6, the sealing ring 6 is arranged in a U shape, the sealing ring 6 comprises an upper sealing ring 61, a lower sealing ring 62 and a connecting part 63, the lower end surface of the lower sealing ring 62 is arranged in a protruding way, the connecting part of the piston 4 and the sealing ring 6 is provided with a first ring groove 64 matched with the lower sealing ring, the sealing ring 6 is embedded with a steel ring 65 arranged in a shape of a Chinese character 'jian', the steel ring 65 is clamped with the first annular groove 64 through the lower sealing ring 62, a plurality of through holes 66 are formed in the steel ring 65, and a space is formed between the middle part of the steel ring 65 and the concave part at the tail part of the steel ring 65 and the sealing ring 6.

In the embodiment of the present invention, a filter screen 67 is embedded at the opening of the through hole 66.

The embodiment of the utility model provides an in, be equipped with two sets of spring assembly on two pistons 4 respectively, every spring assembly of group includes two piece at least springs 7, and the one end fixed connection that spring 7 deviates from the piston is on the inner wall of apron 101.

The embodiment of the utility model provides an in, apron 101 and casing 1 are through a plurality of bolt fixed connection, and apron 101 sets up with casing 1's connecting portion "L" font, has seted up second annular 8 on the tangent plane of apron 101 and casing 1, glues in the second annular 8 and is equipped with sealed the pad 9.

In the embodiment of the utility model, the steel ring 65 roughness setting in surface, the "U" font opening part of sealing washer 6 is inconsistent with steel ring 65.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a pneumatic actuator, includes apron (101) of casing (1) and casing (1) both sides, has all seted up inlet port (102) on apron (101), its characterized in that: the middle part in the shell (1) is provided with a shaft lever (2) which penetrates through the shell (1) and is connected in a rotating and sealing way, one end of the shaft lever (2) positioned in the shell (1) is connected with a gear (3) in a key way, two sides of the shaft lever (2) are provided with pistons (4) inserted in the shell (1), one sides of two adjacent pistons (4) are fixedly provided with racks (5), the two racks (5) are respectively positioned at the upper side and the lower side of the gear (3) and are meshed with the gear (3), the outer side of each piston (4) is sleeved with a sealing ring (6), the sealing rings (6) are arranged in a U shape, each sealing ring (6) comprises an upper sealing ring (61), a lower sealing ring (62) and a connecting part (63), the lower end face of each lower sealing ring (62) is arranged in a protruding way, a first annular groove (64) matched with the lower sealing ring is arranged at the connecting part of each piston (4) and each sealing ring (6), a steel ring (65) arranged in a shape in a embedding way in a ' slide ' shape ' is arranged in the sealing ring (6), the steel ring (65) is clamped with the first annular groove (64) through the lower sealing ring (62), a plurality of through holes (66) are formed in the steel ring (65), and a space is formed between the middle part of the steel ring (65) and the concave part at the tail part of the steel ring and the sealing ring (6).

2. A pneumatic actuator as claimed in claim 1, wherein: a filter screen (67) is embedded at the opening of the through hole (66).

3. A pneumatic actuator as claimed in claim 1, wherein: two sets of spring groups are respectively arranged on the two pistons (4), each spring group comprises at least two springs (7), and one ends of the springs (7) departing from the pistons are fixedly connected to the inner wall of the cover plate (101).

4. A pneumatic actuator as claimed in claim 1, wherein: the cover plate (101) is fixedly connected with the shell (1) through a plurality of bolts, the fixing position of the cover plate (101) and the shell (1) is arranged in an L shape, a second annular groove (8) is formed in the tangent plane of the cover plate (101) and the shell (1), and a sealing gasket (9) is arranged in the second annular groove (8) in a bonding mode.

5. A pneumatic actuator as claimed in claim 1, wherein: the surface of the steel ring (65) is rough, and the U-shaped opening of the sealing ring (6) is abutted against the steel ring (65).