A diaphragm type pneumatic actuator

Abstract

The present invention proposes a diaphragm-type pneumatic actuator, comprising an upper shell, a lower shell, a diaphragm, an upper tray, a lower tray, a disc spring group, a push rod, a guide seat and a guide slide rod, wherein an air chamber is provided between the upper shell and the lower shell, an edge of the diaphragm is fixed between the upper shell and the lower shell, the diaphragm divides the air chamber into an upper cavity and a lower cavity, the lower cavity is sequentially provided with an upper tray, a push rod and a lower tray from top to bottom, the top of the upper tray abuts against the diaphragm, the outer sleeve of the push rod is provided with a disc spring group, an adjusting bolt is installed at the bottom of the lower shell, the top of the adjusting bolt abuts against the lower tray, guide seats are symmetrically installed on both sides of the inner wall of the lower shell, two guide slide rods are installed below the upper tray, the upper part of the guide slide rod is provided with a reset spring, and the lower part of the guide slide rod passes through the guide seat. The pneumatic actuator has high action stability, high precision and high reliability.

Description

[Technical field]

[0001] The invention relates to the technical field of pneumatic actuators, in particular to a diaphragm type pneumatic actuator. [Background technology]

[0002] Pneumatic actuators are commonly known as pneumatic heads and pneumatic actuators. Actuators are divided into three categories according to their energy forms: pneumatic, electric and hydraulic. They have their own characteristics and are suitable for different occasions. Pneumatic actuators are a category of actuators. Pneumatic actuators can also be divided into two types: single-acting and double-acting: the switching actions of the actuators are driven by the air source, which is called double-acting. For single-acting actuators, only the opening or closing is driven by the air source, and the opposite action is reset by the spring. The actuator and the regulating mechanism of the pneumatic actuator are a unified whole. Its actuators are diaphragm type, piston type, fork type and gear rack type. A diaphragm pneumatic actuator is now proposed. [Summary of the invention]

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a diaphragm type pneumatic actuator with high action stability, high precision and high reliability.

[0004] To achieve the above-mentioned purpose, the present invention proposes a thin-film pneumatic actuator, including an upper shell, a lower shell, a diaphragm, an upper tray, a lower tray, a disc spring group, a push rod, a guide seat and a guide slide rod. The top of the upper shell has an air pipe for connecting to an air source. The upper shell and the lower shell are connected by a plurality of fasteners. An air chamber is provided between the upper shell and the lower shell. The edge of the diaphragm is fixed between the upper shell and the lower shell. The diaphragm divides the air chamber into an upper cavity and a lower cavity. The upper cavity is communicated with the air pipe. The lower cavity is provided with an upper tray, a push rod and a lower tray from top to bottom. The top is against the diaphragm, the outer sleeve of the push rod is provided with a disc spring group, the top of the disc spring group is against the upper tray, the bottom of the disc spring group is against the lower tray, an adjusting bolt is installed at the bottom of the lower shell body, the bottom of the push rod passes through the adjusting bolt and extends to the outside of the lower shell body, the top of the adjusting bolt extends into the lower cavity and against the lower tray, guide seats are symmetrically installed on both sides of the inner wall of the lower shell body, two guide slide rods are installed under the upper tray, the guide slide rods are symmetrically arranged on both sides of the push rod, the upper part of the guide slide rod is provided with a reset spring, and the lower part of the guide slide rod passes through the guide seat.

[0005] Preferably, a first mounting seat is provided at the center of the lower wall of the upper tray, the first mounting seat has a first groove opening downward, the top of the disc spring group is installed in the first groove, the top of the push rod is connected to the first mounting seat via a fastener, and second mounting seats are symmetrically provided on both sides of the first mounting seat, the second mounting seat has a second groove opening downward, the top of the return spring is installed in the second groove, and the top of the guide slide rod is connected to the second mounting seat via a fastener.

[0006] Preferably, the guide seat includes a fixed frame, a support frame, and a third mounting seat. The fixed frame is installed on the inner wall of the lower shell body by fasteners, the support frame is installed on the fixed frame, the lower wall of the support frame is provided with a reinforcing plate connected to the fixed frame, the upper wall of the support frame is provided with a third mounting seat, the third mounting seat is provided with a third groove, the bottom of the reset spring is installed in the third groove, a first guide cavity is opened below the third groove for the guide slide rod to pass through, and a second guide cavity communicated with the first guide cavity is provided at the bottom of the support frame.

[0007] Preferably, the bottom of the lower shell body has a base, a first threaded hole is opened on the base, the adjusting bolt is installed in the first threaded hole, the adjusting bolt coincides with the axis of the push rod, the adjusting bolt has a first center hole for the push rod to pass through, and hexagonal grooves are symmetrically provided on both sides of the bolt head of the adjusting bolt.

[0008] Preferably, a fourth groove is provided in the lower tray, the bottom of the disc spring group is installed in the fourth groove, and a second center hole is provided below the fourth groove for the push rod to pass through. Support wings are symmetrically provided on both sides of the lower tray, and a first through hole is provided on the support wings. Two second threaded holes are symmetrically provided on the base, and a limiting screw is installed in the second threaded hole. The top of the limiting screw passes through the first through hole and is installed with a limiting nut.

[0009] The beneficial effects of the present invention are as follows: the present invention cooperates with the upper shell, the lower shell, the diaphragm, the upper tray, the lower tray, the disc spring group, the push rod, the guide seat and the guide slide rod, and by arranging the guide slide rod and the return spring at both ends of the push rod, the movement of the push rod can be stable, the upper tray can keep the spring force on the diaphragm uniform, and the stability of the diaphragm operation is improved; by arranging the adjustment bolt, the output torque can be fine-tuned by fine-tuning the compression amount of the spring, so that the pneumatic actuator can be more accurately matched with the valve; by arranging the limit screw, the lower tray can be kept in a stable state during the operation of the push rod, and the shaking phenomenon of the lower tray can be reduced.

[0010] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0011] Figure 1 It is a cross-sectional schematic diagram of a diaphragm-type pneumatic actuator of the present invention;

[0012] Figure 2 It is a cross-sectional schematic diagram of the lower half of a diaphragm-type pneumatic actuator of the present invention;

[0013] Figure 3 It is a cross-sectional view of an upper tray of a diaphragm-type pneumatic actuator of the present invention;

[0014] Figure 4 It is a cross-sectional view of a guide seat of a diaphragm-type pneumatic actuator of the present invention. [Specific implementation method]

[0015] See also Figures 1 to 4 The present invention discloses a thin-film pneumatic actuator, comprising an upper shell 1, a lower shell 2, a diaphragm 3, an upper tray 4, a lower tray 5, a disc spring group 6, a push rod 7, a guide seat 8 and a guide slide bar 9. The top of the upper shell 1 is provided with an air pipe 11 for connecting an air source. The upper shell 1 and the lower shell 2 are connected by a plurality of fasteners. An air chamber is provided between the upper shell 1 and the lower shell 2. The edge of the diaphragm 3 is fixed between the upper shell 1 and the lower shell 2. The diaphragm 3 divides the air chamber into an upper cavity and a lower cavity. The upper cavity is communicated with the air pipe 11. The upper tray 4, the push rod 7 and the lower tray 5 are arranged in sequence from top to bottom in the lower cavity. The top of the upper tray 4 is connected to the diaphragm 3. The outer part of the push rod 7 is sleeved with a disc spring group 6, the top of the disc spring group 6 is in abutment with the upper tray 4, and the bottom of the disc spring group 6 is in abutment with the lower tray 5. An adjusting bolt 22 is installed at the bottom of the lower shell 2. The bottom of the push rod 7 passes through the adjusting bolt 22 and extends to the outside of the lower shell 2. The top of the adjusting bolt 22 extends into the lower cavity and abuts against the lower tray 5. Guide seats 8 are symmetrically installed on both sides of the inner wall of the lower shell 2. Two guide slide bars 9 are installed under the upper tray 4. The guide slide bars 9 are symmetrically arranged on both sides of the push rod 7. The upper part of the guide slide bar 9 is sleeved with a reset spring 91, and the lower part of the guide slide bar 9 passes through the guide seat 8.

[0016] Furthermore, a first mounting seat 41 is provided at the center of the lower wall of the upper tray 4, and the first mounting seat 41 has a first groove 411 opening downward, the top of the disc spring group 6 is installed in the first groove 411, and the top of the push rod 7 is connected to the first mounting seat 41 through a fastener, and second mounting seats 42 are symmetrically provided on both sides of the first mounting seat 41, and the second mounting seat 42 has a second groove 421 opening downward, the top of the reset spring 91 is installed in the second groove 421, and the top of the guide slide bar 9 is connected to the second mounting seat 42 through a fastener.

[0017] Furthermore, the guide seat 8 includes a fixing frame 81, a supporting frame 82, and a third mounting seat 83. The fixing frame 81 is installed on the inner wall of the lower shell 2 by fasteners. The supporting frame 82 is installed on the fixing frame 81. The lower wall of the supporting frame 82 is provided with a reinforcing plate connected to the fixing frame 81. The upper wall of the supporting frame 82 is provided with a third mounting seat 83. The third mounting seat 83 is provided with a third groove 831. The bottom of the reset spring 91 is installed in the third groove 831. A first guide cavity 832 for the guide slide rod 9 to pass through is opened below the third groove 831. The bottom of the support frame 82 is provided with a second guide cavity 820 communicating with the first guide cavity 832.

[0018] Furthermore, the bottom of the lower shell 2 has a base 21, and a first threaded hole 211 is opened on the base 21. The adjusting bolt 22 is installed in the first threaded hole 211. The adjusting bolt 22 coincides with the axis of the push rod 7. The adjusting bolt 22 has a first center hole 220 for the push rod 7 to pass through, and the bolt head of the adjusting bolt 22 is symmetrically provided with hexagonal grooves 221 on both sides.

[0019] Furthermore, a fourth groove 51 is provided in the lower tray 5, the bottom of the disc spring group 6 is installed in the fourth groove 51, and a second center hole 510 is provided below the fourth groove 51 for the push rod 7 to pass through. Support wings 52 are symmetrically provided on both sides of the lower tray 5, and a first through hole 520 is provided on the support wings 52. Two second threaded holes 212 are symmetrically provided on the base 21, and a limiting screw 23 is installed in the second threaded hole 212. The top of the limiting screw 23 passes through the first through hole 520, and a limiting nut 231 is installed.

[0020] Working process of the present invention:

[0021] The present invention discloses a thin-film pneumatic actuator. When the gas source is pressurized, the diaphragm is expanded and deformed downward by force, thereby pressing the upper tray to overcome the restoring force of the disc spring group and the reset spring and drive the push rod downward; when the gas source is depressurized, the tray is affected by the restoring force of the disc spring group and the reset spring, and will drive the push rod to move upward. By arranging guide slide bars and reset springs at both ends of the push rod, the push rod can move stably, and the upper tray can keep the spring force on the diaphragm uniform, thereby improving the stability of the diaphragm operation; by arranging an adjustment bolt, the output torque can be fine-tuned by fine-tuning the compression amount of the spring, so that the pneumatic actuator can be more accurately matched with the valve, and by arranging a limit screw, the lower tray can be kept in a stable state during the operation of the push rod, and the shaking phenomenon of the lower tray can be reduced. In the process of use, the hexagonal wrench is inserted into the inner hexagonal groove to drive the adjusting bolt to rotate, so as to adjust the position of the adjusting bolt and achieve the purpose of adjusting the position of the lower tray. The limit nut 231 can limit the upward movement of the lower tray 5, and the adjusting bolt can limit the downward movement of the lower tray 5.

[0022] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. A diaphragm pneumatic actuator, characterized in that: The invention comprises an upper shell (1), a lower shell (2), a diaphragm (3), an upper tray (4), a lower tray (5), a disc spring group (6), a push rod (7), a guide seat (8) and a guide slide rod (9), wherein the top of the upper shell (1) is provided with an air pipe (11) for connecting to an air source, the upper shell (1) and the lower shell (2) are connected by a plurality of fasteners, an air chamber is provided between the upper shell (1) and the lower shell (2), an edge of the diaphragm (3) is fixed between the upper shell (1) and the lower shell (2), the diaphragm (3) divides the air chamber into an upper cavity and a lower cavity, the upper cavity is communicated with the air pipe (11), the lower cavity is provided with an upper tray (4), a push rod (7) and a lower tray (5) in sequence from top to bottom, the upper The top of the tray (4) is in contact with the diaphragm (3), the outer sleeve of the push rod (7) is provided with a disc spring group (6), the top of the disc spring group (6) is in contact with the upper tray (4), the bottom of the disc spring group (6) is in contact with the lower tray (5), the bottom of the lower shell (2) is installed with an adjusting bolt (22), the bottom of the push rod (7) passes through the adjusting bolt (22) and extends to the outside of the lower shell (2), the top of the adjusting bolt (22) extends into the lower cavity and is in contact with the lower tray (5), the inner wall of the lower shell (2) is symmetrically installed with guide seats (8), two guide slide bars (9) are installed below the upper tray (4), the guide slide bars (9) are symmetrically arranged on both sides of the push rod (7), and the guide slide bars (9) are symmetrically arranged on both sides of the push rod (7). The upper part of the guide slide bar (9) is sleeved with a return spring (91), the lower part of the guide slide bar (9) passes through the guide seat (8), a first mounting seat (41) is provided at the center of the lower wall of the upper tray (4), the first mounting seat (41) has a first groove (411) opening downward, the top of the disc spring group (6) is installed in the first groove (411), the top of the push rod (7) is connected to the first mounting seat (41) through a fastener, second mounting seats (42) are symmetrically provided on both sides of the first mounting seat (41), the second mounting seat (42) has a second groove (421) opening downward, the top of the return spring (91) is installed in the second groove (421), the top of the guide slide bar (9) passes through the guide seat (8), and the top of the disc spring group (6) is installed in the first groove (411). The guide seat (8) is connected to the second mounting seat (42) through a fastener, the guide seat (8) comprises a fixing frame (81), a supporting frame (82), and a third mounting seat (83), the fixing frame (81) is mounted on the inner wall of the lower shell (2) through a fastener, the supporting frame (82) is mounted on the fixing frame (81), the lower wall of the supporting frame (82) is provided with a reinforcing plate connected to the fixing frame (81), the upper wall of the supporting frame (82) is provided with a third mounting seat (83), the third mounting seat (83) is provided with a third groove (831), the bottom of the return spring (91) is installed in the third groove (831), and a first guide cavity (832) for the guide slide bar (9) to pass through is opened below the third groove (831),A second guide cavity (820) communicating with the first guide cavity (832) is provided at the bottom of the support frame (82).

2. A diaphragm pneumatic actuator according to claim 1, characterized in that: The bottom of the lower shell (2) has a base (21), the base (21) is provided with a first threaded hole (211), the adjusting bolt (22) is installed in the first threaded hole (211), the adjusting bolt (22) coincides with the axis of the push rod (7), the adjusting bolt (22) has a first center hole (220) for the push rod (7) to pass through, and the bolt head of the adjusting bolt (22) is symmetrically provided with hexagonal grooves (221) on both sides.

3. A diaphragm pneumatic actuator according to claim 2, characterized in that: A fourth groove (51) is provided in the lower tray (5), the bottom of the disc spring assembly (6) is installed in the fourth groove (51), and a second center hole (510) is provided below the fourth groove (51) for the push rod (7) to pass through. Support wings (52) are symmetrically provided on both sides of the lower tray (5), and a first through hole (520) is provided on the support wings (52). Two second threaded holes (212) are symmetrically provided on the base (21), and a limiting screw (23) is installed in the second threaded hole (212). The top of the limiting screw (23) passes through the first through hole (520) and is installed with a limiting nut (231).

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