Failure type dual-purpose pneumatic actuator

Abstract

The utility model relates to a failure type dual-purpose pneumatic actuator which comprises an air cylinder, a piston piece, a piston rod assembly and a reset assembly, the piston piece and the piston rod assembly are connected into the air cylinder in a sliding mode, the air cylinder is provided with an air inlet used for controlling the piston piece to move, and the reset assembly is detachably connected to the air cylinder. The reset assembly comprises a cylinder base, a spring base and a reset spring. According to the utility model, the reset assembly is independent of the cylinder and is detachably connected to the cylinder, when the cylinder is provided with the reset assembly, the actuator becomes a single-action actuator with a reset function, and when the reset assembly is taken down, the actuator becomes a double-action actuator, and reset springs with different specifications can be replaced according to requirements, so that the operation is convenient, and the cost is low. The air tightness of the air cylinder is not damaged, so that the air cylinder can be used under various working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to a failure-type dual-purpose pneumatic actuator. Background Art

[0002] A pneumatic actuator is a device that drives the opening and closing of a valve through a pneumatic device. Traditional pneumatic actuators have the problem of a single application condition. For example, patent number CN202122090887.6 discloses a pneumatic drive device for a quick-cut shut-off valve. In the actuator part, a spring is provided in the cylinder. One end of the spring contacts the rear end cover, and the other end contacts the piston. The piston is controlled by inputting an air pressure source to work against the spring. The force and stroke are fixed. If the spring needs to be replaced, the original sealing structure of the actuator will be destroyed, and the air tightness of the actuator needs to be retested. Therefore, traditional actuators cannot meet the requirements of multiple working conditions. Summary of the Invention

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: a failure-type dual-purpose pneumatic actuator, comprising a cylinder, and a piston member and a piston rod assembly slidingly connected in the cylinder, the cylinder being provided with an air inlet for controlling the movement of the piston member, and also comprising a reset assembly detachably connected to the cylinder, the end face of the cylinder being provided with an adapter plate, the reset assembly comprising a cylinder seat, a spring seat and a reset spring, the cylinder seat being detachably connected to the cylinder through the adapter plate, the spring seat being slidingly connected in the cylinder seat, one end of the piston rod assembly being detachably connected to the spring seat, and a reset spring for controlling the reset of the piston member being provided between the spring seat and the adapter plate.

[0004] By adopting the above technical solution, the reset assembly is separated from the cylinder and can be detachably connected to the cylinder. When the cylinder is installed with the reset assembly, the actuator becomes a single-acting actuator with a reset function. When the reset assembly is removed, the actuator becomes a double-acting actuator. Reset springs of different specifications can be replaced as needed without destroying the air tightness of the cylinder, so that it can be used under various working conditions.

[0005] The utility model is further configured such that the adapter plate is provided with threaded holes distributed in a circumferential manner, the cylinder seat is provided with mounting holes corresponding to the threaded holes, and a limiting surface for controlling the stroke of the piston member, the cylinder seat is threadedly connected to the adapter plate through the threaded holes, the spring seat is provided with a through hole, and the piston rod assembly is threadedly connected to the spring seat through the through hole.

[0006] Using the above technical solution, the cylinder seat is connected to the adapter plate by screws. The cylinder seat can be replaced by simply removing the screws. The replacement method is simple and quick. The limit surface is used to control the starting position of the piston rod assembly. By replacing the cylinder seat with different height limit surfaces, the stroke of the actuator can be controlled.

[0007] The present invention is further configured such that the adapter plate and the spring seat are respectively provided with an annular groove and a positioning column for connecting the reset spring.

[0008] By adopting the above technical solution, the positioning of the annular groove and the positioning column structure is limited to avoid tilting and misalignment of the reset spring, thereby maintaining the stability of the actuator transmission structure.

[0009] The utility model is further configured such that the cylinder seat is provided with an opening window for observing the working state of the spring seat, and a sealing cover is provided on one side of the cylinder seat located at the opening window.

[0010] By adopting the above technical solution, the working status of the actuator can be intuitively seen by removing the cover. External devices such as micro switches and photoelectric sensors can be installed at the opening window to detect the working status of the actuator to meet the needs of hydraulic system fault analysis.

[0011] The utility model is further configured as follows: the piston rod assembly includes a screw and a push rod distributed on the upper and lower sides of the piston member, and a nut member for locking, the push rod is provided with a step portion and a first threaded portion, the piston member is provided with a countersunk hole adapted to the step portion, the push rod is threadedly connected to the nut member and the screw through the countersunk hole, one end of the screw is provided with a second threaded portion, and the screw is threadedly connected to the nut member through the through hole.

[0012] By adopting the above technical solution, the screw is provided with an internal thread, the nut and the screw are installed at the same time on the first threaded portion, and two sets of nut parts are installed on the second threaded portion, so that the connection structures at the screw and the push rod and the screw and the threaded seat are both fixedly connected by a double nut structure, thereby improving the structural strength of the piston rod assembly.

[0013] The utility model is further configured as follows: the cylinder includes a cylinder body, an upper end cover, a lower end cover and a sealing ring; the upper end cover and the lower end cover are connected to both sides of the cylinder body by bolts; the upper end cover and the lower end cover are sealed to the cylinder body by sealing rings; the side of the upper end cover / lower end cover is provided with the air inlet; the screw and the push rod are respectively slidably connected to the upper end cover and the lower end cover; the adapter plate is fixedly connected to the upper end cover.

[0014] The utility model is further configured such that a wear-resistant ring and a sealing ring are provided at the connection between the screw / push rod and the upper end cover / lower end cover, a wear-resistant ring and a sealing ring are provided at the connection between the piston and the cylinder body, and a wear-resistant ring is provided at the connection between the cylinder seat and the spring seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The reset assembly is independent of the cylinder and can be detachably connected to the cylinder. When the cylinder is installed with the reset assembly, the actuator becomes a single-acting actuator with a reset function. When the reset assembly is removed, the actuator becomes a double-acting actuator. Reset springs of different specifications can be replaced as needed without destroying the airtightness of the cylinder, making it suitable for use under various working conditions.

[0017] The embodiments of the present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the main view of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 For the utility model Figure 2 A partial enlarged view of the A direction view;

[0021] Figure 4 For the utility model Figure 2 A partial enlarged view of the middle B direction view;

[0022] Figure 5 For the utility model Figure 2 A partial enlarged view of the middle C-direction view;

[0023] Figure 6 This is a schematic diagram of the structure of the utility model without the reset component;

[0024] Wherein: 1 - cylinder, 2 - piston, 3 - piston rod assembly, 4 - reset assembly, 5 - adapter plate, 6 - cylinder seat, 7 - spring seat, 8 - reset spring, 9 - cover, 11 - cylinder body, 12 - upper end cover, 13 - lower end cover, 14 - sealing ring, 15 - wear-resistant ring, 21 - countersunk hole, 31 - screw, 32 - push rod, 33 - nut, 34 - step portion, 35 - first threaded portion, 36 - second threaded portion, 51 - threaded hole, 52 - annular groove, 61 - mounting hole, 62 - limit surface, 63 - opening window, 71 - through hole, 72 - positioning column, 100 - air inlet; DETAILED DESCRIPTION

[0025] like Figure 1 、 2As shown, this embodiment provides a failure-type dual-purpose pneumatic actuator, including a cylinder 1, and a piston member 2 and a piston rod assembly 3 slidingly connected in the cylinder 1. The cylinder 1 is provided with an air inlet 100 for controlling the movement of the piston member 2, and also includes a reset assembly 4 detachably connected to the cylinder 1. The end face of the cylinder 1 is provided with an adapter plate 5. The reset assembly 4 includes a cylinder seat 6, a spring seat 7 and a reset spring 8. The cylinder seat 6 is detachably connected to the cylinder 1 through the adapter plate 5. The spring seat 7 is slidably connected in the cylinder seat 6. One end of the piston rod assembly 3 is detachably connected to the spring seat 7, and a reset spring 8 for controlling the reset of the piston member 2 is provided between the spring seat 7 and the adapter plate 5.

[0026] Combine Figure 3 、 4 As shown, in this embodiment, the adapter plate 5 is provided with threaded holes 51 distributed in a circumferential manner, the cylinder seat 6 is provided with mounting holes 61 corresponding to the threaded holes 51, and a limiting surface 62 for controlling the stroke of the piston member 2, the screw passes through the mounting hole 61 and is threadedly connected to the threaded hole 51, so that the cylinder seat 6 is threadedly connected to the adapter plate 5, the spring seat 7 is provided with a through hole 71, the piston rod assembly 3 passes through the through hole 71 and is threadedly connected to the spring seat 7 through the nut member 33, the adapter plate 5 and the spring seat 7 are respectively provided with an annular groove 52 and a positioning column 72 for connecting the reset spring 8, and the reset spring 8 is prevented from tilting and misalignment by limiting the structure of the annular groove 52 and the positioning column 72, the cylinder seat 6 is provided with an opening window 63 for observing the working status of the spring seat 7, and the cylinder seat 6 is provided with a cover 9 on one side of the opening window 63.

[0027] Combine Figure 5 As shown, in this embodiment, the piston rod assembly 3 includes a screw 31 and a push rod 32 distributed on the upper and lower sides of the piston member 2, and a nut member 33 for locking. The push rod 32 is provided with a step portion 34 and a first threaded portion 35. The piston member 2 is provided with a countersunk hole 21 adapted to the step portion 34. The push rod 32 is threadedly connected to the nut member 33 and the screw 31 through the countersunk hole 21. One end of the screw 31 is provided with a second threaded portion 36. The screw 31 is threadedly connected to the nut member 33 through the through hole 71. The screw 31 is provided with an internal thread. The nut member 33 and the screw 31 are installed at the first threaded portion 35 at the same time, and two groups of nut members 33 are installed at the second threaded portion 36, so that the connection structures at the screw 31 and the push rod 32, and the screw 31 and the threaded seat are fixedly connected by a double nut structure.

[0028] The top cover 12 and the bottom cover 13 are connected to each other on both sides of the cylinder body 11 by bolts. The top cover 12 and the bottom cover 13 are provided with sealing grooves for clamping the sealing ring 14, and are sealed to the cylinder body 11 through the sealing ring 14. The side of the upper end cover 12 / lower end cover 13 is provided with an air inlet 100 connected to the inner cavity of the cylinder body 11, and the outer side of the air inlet 100 is provided with an internal thread for connecting to an external air source. The screw 31 and the push rod 32 are respectively slidably connected to the upper end cover 12 and the lower end cover 13. The adapter plate 5 is fixedly connected to the upper end cover 12. The connection between the screw 31 / push rod 32 and the upper end cover 12 / lower end cover 13 is provided with a wear-resistant ring 15 and a sealing ring 14. The connection between the piston 2 and the cylinder body 11 is provided with a wear-resistant ring 15 and a sealing ring 14. The connection between the cylinder seat 6 and the spring seat 7 is provided with a wear-resistant ring 15.

[0029] Combine Figure 6 As shown, the working principle of the present invention is that when the air source enters the cylinder body 11 from the air inlet 100, the piston member 2 is controlled to move downward, and the spring seat 7 is controlled by the screw 31 to compress the return spring 8; when the air source stops inputting, the return spring 8 forces the piston member 2 to return to its original position, and the return assembly 4 is independent of the cylinder 1, so that it can be detachably connected to the cylinder 1. When the cylinder 1 is installed with the return assembly 4, the actuator becomes a single-acting actuator with a return function. When the return assembly 4 is removed, the actuator becomes a double-acting actuator, and the return springs 8 of different specifications can be replaced as needed without destroying the air tightness of the cylinder 1, so that it can be used under various working conditions. The working status of the actuator can be intuitively seen by removing the cover 9, and external devices such as micro switches and photoelectric sensors for detecting the working status of the actuator can be installed in the opening window 63 to meet the needs of fault analysis of the hydraulic system.

[0030] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A failure-type dual-use pneumatic actuator, comprising a cylinder (1), a piston member (2) and a piston rod assembly (3) slidably connected in the cylinder (1), the cylinder (1) being provided with an air inlet (100) for controlling the movement of the piston member (2), characterized in that: The invention also includes a reset assembly (4) detachably connected to the cylinder (1), an adapter plate (5) being provided on the end surface of the cylinder (1), the reset assembly (4) including a cylinder seat (6), a spring seat (7) and a reset spring (8), the cylinder seat (6) being detachably connected to the cylinder (1) via the adapter plate (5), the spring seat (7) being slidably connected inside the cylinder seat (6), one end of the piston rod assembly (3) being detachably connected to the spring seat (7), and a reset spring (8) for controlling the reset of the piston member (2) being provided between the spring seat (7) and the adapter plate (5).

2. A failure-proof dual-use pneumatic actuator according to claim 1, characterized in that: The adapter plate (5) is provided with threaded holes (51) distributed in a circumferential manner, the cylinder seat (6) is provided with mounting holes (61) corresponding to the threaded holes (51), and a limit surface (62) for controlling the stroke of the piston member (2), the cylinder seat (6) is threadedly connected to the adapter plate (5) through the threaded holes (51), the spring seat (7) is provided with a through hole (71), and the piston rod assembly (3) is threadedly connected to the spring seat (7) through the through hole (71).

3. The failure-resistant dual-use pneumatic actuator according to claim 2, characterized in that: The adapter plate (5) and the spring seat (7) are respectively provided with an annular groove (52) and a positioning column (72) for connecting the return spring (8).

4. A failure-proof dual-use pneumatic actuator according to claim 3, characterized in that: The cylinder seat (6) is provided with an opening window (63) for observing the working state of the spring seat (7), and a sealing cover (9) is provided on one side of the cylinder seat (6) located at the opening window (63).

5. The failure-resistant dual-use pneumatic actuator according to claim 2, characterized in that: The piston rod assembly (3) includes a screw (31) and a push rod (32) distributed on the upper and lower sides of the piston member (2), and a nut member (33) for locking. The push rod (32) is provided with a step portion (34) and a first threaded portion (35). The piston member (2) is provided with a countersunk hole (21) adapted to the step portion (34). The push rod (32) passes through the countersunk hole (21) and is threadedly connected to the nut member (33) and the screw rod (31). One end of the screw rod (31) is provided with a second threaded portion (36). The screw rod (31) passes through the through hole (71) and is threadedly connected to the nut member (33).

6. The failure-resistant dual-use pneumatic actuator according to claim 5, characterized in that: The cylinder (1) comprises a cylinder body (11), an upper end cover (12), a lower end cover (13) and a sealing ring (14); the upper end cover (12) and the lower end cover (13) are connected to both sides of the cylinder body (11) by bolts; the upper end cover (12) and the lower end cover (13) are sealed to the cylinder body (11) by the sealing ring (14); the side of the upper end cover (12) / lower end cover (13) is provided with the air inlet (100); the screw (31) and the push rod (32) are respectively slidably connected to the upper end cover (12) and the lower end cover (13); and the adapter plate (5) is fixedly connected to the upper end cover (12).

7. The failure-resistant dual-use pneumatic actuator according to claim 6, characterized in that: A wear-resistant ring (15) and a sealing ring (14) are provided at the connection between the screw (31) / push rod (32) and the upper end cover (12) / lower end cover (13); a wear-resistant ring (15) and a sealing ring (14) are provided at the connection between the piston (2) and the cylinder body (11); and a wear-resistant ring (15) is provided at the connection between the cylinder seat (6) and the spring seat (7).

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