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CN-224214818-U - Double-cylinder pneumatic actuator

CN224214818UCN 224214818 UCN224214818 UCN 224214818UCN-224214818-U

Abstract

The utility model discloses a double-cylinder pneumatic actuator, which comprises a cylinder assembly, a bracket assembly and a valve, wherein the cylinder assembly comprises a cylinder body and an actuating member which are coaxially arranged, the actuating member is arranged in an inner cavity of the cylinder body, an air port communicated with the inner cavity of the cylinder body is formed in the cylinder body, air is filled into the inner cavity of the cylinder body through the air port to push the actuating member to reciprocate along the axis direction of the actuating member, the bottom of the cylinder body is provided with a positioning groove along the axis direction of the positioning groove, the bracket assembly is fixedly connected with the cylinder body and comprises a positioning table and a positioning hole which are coaxially arranged, the positioning table is matched with the positioning groove and used for positioning the cylinder body so as to enable the cylinder body and the bracket assembly to be coaxially arranged, and the positioning hole is used for positioning the valve and the actuating member to be coaxially arranged. According to the utility model, the output tension of the executing piece can be selected as the double-piston action tension and the single-piston action tension according to the requirements, and the output thrust of the executing piece is selected as the double-piston action thrust and the single-piston action thrust, so that the functions are more abundant, the positioning precision is higher, and the eccentric wear risk is reduced.

Inventors

  • XU GENHUI
  • FANG LISONG
  • CHANG JIE
  • DU BIN
  • JIANG YONGQI
  • ZHANG QIMEI

Assignees

  • 北京思睿博格流体科技有限公司

Dates

Publication Date
20260508
Application Date
20250604

Claims (10)

  1. 1. A dual cylinder pneumatic actuator comprising: The cylinder assembly (1) comprises a cylinder body (11) and an executing piece (12) which are coaxially arranged, wherein the executing piece (12) is arranged in an inner cavity of the cylinder body (11), one end of the executing piece (12) extends out of the cylinder body (11) and is used for being connected with a valve, an air port (13) communicated with the inner cavity of the cylinder body (11) is formed in the cylinder body (11), and air is filled into the inner cavity of the cylinder body (11) through the air port (13) so as to push the executing piece (12) to reciprocate along the axis direction of the executing piece, and a positioning groove is formed in the bottom of the cylinder body (11) along the axis direction of the executing piece; The support assembly (2) is fixedly connected with the cylinder body (11) and comprises a positioning table (21-1) and a positioning hole (22-1) which are coaxially arranged, the positioning table (21-1) is matched with the positioning groove and used for positioning the cylinder body (11), the cylinder body (11) and the support assembly (2) are coaxially arranged, and the positioning hole (22-1) is used for positioning the valve so that the valve and the executing piece (12) are coaxially arranged.
  2. 2. The double-cylinder pneumatic actuator according to claim 1, wherein the cylinder body (11) comprises an upper cylinder barrel (111), a lower cylinder barrel (112), an upper cylinder cover (113), a lower cylinder cover (114) and a partition plate (115), the upper cylinder cover (113) is arranged at the top end of the upper cylinder barrel (111) in a sealing manner, the lower cylinder cover (114) is arranged at the bottom end of the lower cylinder barrel (112) in a sealing manner, the lower cylinder barrel (112) is located right below the upper cylinder barrel (111), and the upper cylinder barrel (111) and the lower cylinder barrel (112) are hermetically isolated through the partition plate (115) so that an upper cylinder cavity is formed in the upper cylinder barrel (111) and a lower cylinder cavity is formed in the lower cylinder barrel (112).
  3. 3. The dual cylinder pneumatic actuator according to claim 2, wherein the actuator (12) comprises an upper piston plate (121), a lower piston plate (122) and a piston rod (123), the upper piston plate (121) is slidably disposed in the upper cylinder cavity so as to form an upper cylinder upper cavity and an upper cylinder lower cavity in the upper cylinder cavity in a sealing manner, the lower piston plate (122) is slidably disposed in the lower cylinder cavity so as to form a lower cylinder upper cavity and a lower cylinder lower cavity in the lower cylinder cavity in a sealing manner, the piston rod (123) comprises a first rod body (1231) and a second rod body (1232) which are coaxially and fixedly connected, both ends of the first rod body (1231) are fixedly connected with the upper piston plate (121) and the lower piston plate (122), respectively, and one end of the second rod body (1232) far from the first rod body (1231) extends out of the cylinder body (11).
  4. 4. A dual cylinder pneumatic actuator as claimed in claim 3 wherein said air port (13) comprises an upper air port (131), a first middle air port (132), a second middle air port (133) and a lower air port (134), said upper air port (131) being open on said upper cylinder head (113) and communicating with said upper cylinder upper chamber, said first middle air port (132) being open on said baffle plate (115) and communicating with said upper cylinder lower chamber, said second middle air port (133) being open on said baffle plate (115) and communicating with said lower cylinder upper chamber, said lower air port (134) being open on said lower cylinder head (114) and communicating with said lower cylinder lower chamber; The upper air port (131) and the lower air port (134) are both used for being connected with an external air charging and discharging mechanism, the first middle air port (132) is used for being communicated with the lower air port (134) or the external atmosphere, and the second middle air port (133) is used for sealing and plugging or is communicated with the external atmosphere; When the lower air port (134) is used for air intake, the first middle air port (132) is communicated with the lower air port (134), the tension output by the actuating piece (12) is double-piston action tension, so that the piston rod (123) moves upwards along the axial direction of the piston rod; When the lower air port (134) is used for air intake and the first middle air port (132) is communicated with the external atmosphere, the output tension of the actuating piece (12) is single-piston action tension, so that the piston rod (123) moves upwards along the axial direction of the piston rod.
  5. 5. The double-cylinder pneumatic actuator according to claim 4, wherein an air duct is formed in the first rod body (1231), one end of the air duct is communicated with the upper cavity of the lower cylinder, the other end of the air duct is provided with a threaded port (1231-3), and a sealing element is detachably connected in the threaded port (1231-3) and used for enabling the air duct to be communicated or not communicated with the upper cavity of the upper cylinder; When the upper air port (131) is used for air intake, the second middle air port (133) is used for sealing and blocking, and the air guide pore canal is communicated with the upper cavity of the upper cylinder, the actuating piece (12) outputs thrust to be double-piston action thrust, so that the piston rod (123) moves downwards along the axial direction of the piston rod; When the upper air port (131) is used for air intake, the second middle air port (133) is communicated with the external atmosphere, and the air guide pore canal is not communicated with the upper cavity of the upper cylinder, the actuating piece (12) outputs thrust to be single-piston action thrust, so that the piston rod (123) moves downwards along the axial direction of the actuating piece.
  6. 6. The double-cylinder pneumatic actuator according to claim 5, wherein the air guide hole comprises an axial air guide hole (1231-1) and a plurality of transverse air guide holes (1231-2), the axial air guide holes (1231-1) are formed in the first rod body (1231) along the axial direction of the first rod body (1231), the transverse air guide holes (1231-2) are uniformly formed in the first rod body (1231) along the circumferential direction of the first rod body (1231), one end of each axial air guide hole (1231-1) is located in the upper cavity of the upper cylinder and is provided with the threaded port (1231-3), the other end of each axial air guide hole is located in the upper cavity of the lower cylinder and is communicated with the transverse air guide holes (1231-2), a guide sleeve (124) is further rotatably sleeved on the outer wall of the first rod body (1231), a plurality of transverse air guide holes (124) are uniformly formed in the first rod body (1231) along the circumferential direction of the guide sleeve, and the axial air guide holes (1231-1) are correspondingly provided with the transverse air guide holes (124-1-2).
  7. 7. A double-cylinder pneumatic actuator according to claim 3, wherein an upper sealing ring (1211) is sleeved on the outer circumference of the upper piston plate (121), a lower sealing ring (1221) is sleeved on the outer circumference of the lower piston plate (122), the upper sealing ring (1211) is abutted against the inner wall of the upper cylinder (111), and the lower sealing ring (1221) is abutted against the inner wall of the lower cylinder (112).
  8. 8. The double-cylinder pneumatic actuator according to claim 2, wherein the bracket assembly (2) comprises an upper bracket flange (21) and a lower bracket flange (22) which are coaxially and fixedly connected, the upper bracket flange (21) is fixedly connected with the lower cylinder cover (114), the top of the upper bracket flange (21) is convexly provided with the positioning table (21-1) along the axis direction of the upper bracket flange, the center of the lower bracket flange (22) is provided with the positioning hole (22-1) along the axis direction of the lower bracket flange, the bottom of the lower cylinder cover (114) is concavely provided with the positioning groove along the axis direction of the lower bracket flange, and the positioning table (21-1), the positioning hole (22-1) and the positioning groove are coaxially arranged.
  9. 9. A two-cylinder pneumatic actuator according to claim 3, characterized in that the end of the second rod body (1232) remote from the first rod body (1231) is fixedly provided with a connector (3) for connection with the valve stem (5) of the valve.
  10. 10. The double-cylinder pneumatic actuator according to claim 9, wherein the connector (3) is provided with a position sensing circular table (32), and the bracket assembly (2) is provided with two groups of position detectors (4) which are matched with the position sensing circular table (32) at intervals up and down.

Description

Double-cylinder pneumatic actuator Technical Field The utility model relates to the technical field of actuators, in particular to a double-cylinder pneumatic actuator. Background The pneumatic actuator is used as a driving device which is most commonly used, and is widely applied to terminal execution equipment such as a valve and the like for driving the valve to be opened or closed. At present, a single-cylinder pneumatic actuator is often configured as a pneumatic actuator by a pneumatic valve in the market, and has the advantages of simple structure, stable output, economy, environmental protection and the like, but the single-cylinder pneumatic actuator only outputs tension or thrust by the action of a single piston, the output tension or thrust cannot be changed according to the requirement, the problem of single function setting exists, the problems of large structure, low coaxial positioning precision during installation and the like exist in the single-cylinder pneumatic actuator, and the service life of the pneumatic actuator is reduced. Disclosure of utility model In view of the above-mentioned drawbacks or shortcomings in the prior art, it is desirable to provide a dual-cylinder pneumatic actuator, in which the output tension of the actuator can be selected to be the dual-piston action tension and the single-piston action tension according to requirements, the output thrust of the actuator is selected to be the dual-piston action thrust and the single-piston action thrust, the functions are more abundant, the coaxial positioning accuracy is higher when the piston rod and the valve are installed, the eccentric wear risk is reduced, and the service life is prolonged. The utility model provides a double-cylinder pneumatic actuator, which comprises: The cylinder assembly comprises a cylinder body and an executing piece which are coaxially arranged, wherein the executing piece is arranged in an inner cavity of the cylinder body, one end of the executing piece extends to the outside of the cylinder body and is used for being connected with a valve, an air port communicated with the inner cavity of the cylinder body is formed in the cylinder body, and air is filled into the inner cavity of the cylinder body through the air port so as to push the executing piece to reciprocate along the axis direction of the cylinder body, and a positioning groove is formed in the bottom of the cylinder body along the axis direction of the cylinder body; The support assembly is fixedly connected with the cylinder body and comprises a positioning table and a positioning hole which are coaxially arranged, the positioning table is matched with the positioning groove and used for positioning the cylinder body, so that the cylinder body and the support assembly are coaxially arranged, and the positioning hole is used for positioning the valve so that the valve and the executing piece are coaxially arranged. Further, the cylinder body comprises an upper cylinder barrel, a lower cylinder barrel, an upper cylinder cover, a lower cylinder cover and a partition plate, wherein the upper cylinder cover is arranged at the top end of the upper cylinder barrel in a sealing manner, the lower cylinder cover is arranged at the bottom end of the lower cylinder barrel in a sealing manner, the lower cylinder barrel is located right below the upper cylinder barrel, and the upper cylinder barrel and the lower cylinder barrel are isolated in a sealing manner through the partition plate, so that an upper cylinder cavity is formed in the upper cylinder barrel, and a lower cylinder cavity is formed in the lower cylinder barrel. Further, the actuating member comprises an upper piston plate, a lower piston plate and a piston rod, wherein the upper piston plate is slidably arranged in the upper cylinder inner cavity so as to enable the upper cylinder inner cavity to be sealed to form an upper cylinder upper cavity and an upper cylinder lower cavity, the lower piston plate is slidably arranged in the lower cylinder inner cavity so as to enable the lower cylinder inner cavity to be sealed to form a lower cylinder upper cavity and a lower cylinder lower cavity, the piston rod comprises a first rod body and a second rod body which are coaxially and fixedly connected, two ends of the first rod body are fixedly connected with the upper piston plate and the lower piston plate respectively, and one end of the second rod body, which is far away from the first rod body, extends out of the cylinder body. Further, the air port comprises an upper air port, a first middle air port and a lower air port, wherein the upper air port is arranged on the upper cylinder cover and is communicated with the upper cavity of the upper cylinder, the first middle air port is arranged on the partition plate and is communicated with the lower cavity of the upper cylinder, the second middle air port is arranged on the partition plate and is communicated with the upper cavity of t