Pneumatic actuating mechanism with controllable positioning function

Abstract

The utility model discloses a pneumatic actuating mechanism with a controllable positioning function, which belongs to the technical field of pneumatic actuating mechanisms and comprises an air cylinder, a controllable positioning device, a switch valve, a filtering pressure reducing valve, a pressure switch, an electromagnetic valve and a locking valve. An air inlet of the switch valve is communicated with an external air source, an air outlet of the switch valve is communicated with an air inlet of the filtering pressure reducing valve, and an air outlet of the filtering pressure reducing valve is respectively communicated with air inlets of the pressure switch and the electromagnetic valve. The pneumatic actuating mechanism controls opening and closing of the locking valve through the electromagnetic valve, controls the position of the piston rod of the air cylinder through the positioner and monitors air path pressure through the pressure switch, so that the locking valve can be automatically closed under the conditions of air loss, system faults and the like, the air cylinder is kept at the current position, and accidental action of the piston of the air cylinder is prevented; and the precision degree of the stop position of the air cylinder is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic actuators, in particular to a pneumatic actuator with controllable positioning. Background Art

[0002] With the rapid development of industrial automation technology, pneumatic actuators, as an important component of industrial automation systems, have an increasingly significant impact on production efficiency and product quality due to their accuracy and stability.

[0003] At present, the position control of the cylinder is generally achieved by using a three-position five-way solenoid valve. The position feedback of this method has serious hysteresis, resulting in inaccurate positioning of the final piston. Due to the feedback lag, the final position of the piston often cannot reach the preset precise position, which not only affects the production efficiency, but also brings serious challenges to product quality control. If the piston position is different each time it is started and stopped, the specifications of the products produced cannot be guaranteed to be uniform, and the product failure rate will also increase significantly.

[0004] Therefore, a pneumatic actuator with controllable positioning is needed to solve the above problems. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The utility model provides a pneumatic actuator with controllable positioning, aiming to solve the problem that the traditional three-position five-way solenoid valve is used to realize the position holding control of the cylinder proposed in the background technology, and the position feedback of this method has serious hysteresis, which easily leads to the problem of inaccurate final piston position positioning.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic actuator with controllable positioning, comprising a cylinder and a controllable positioner, a switch valve, a filter pressure reducing valve, a pressure switch, a solenoid valve and a locking valve;

[0009] In order to ensure the accuracy of the cylinder stop position, the air inlet of the switch valve is connected to the external air source, the air outlet of the switch valve is connected to the air inlet of the filter pressure reducing valve, the air outlet of the filter pressure reducing valve is connected to the air inlets of the pressure switch and the solenoid valve respectively, the air outlet of the pressure switch is connected to the air inlet of the controllable positioner, the air outlet of the solenoid valve is connected to the control interface of the locking valve, the air outlet of the controllable positioner is connected to the air inlet of the locking valve, and the air outlet of the locking valve is connected to the control interface of the cylinder; the combined design of the solenoid valve and the locking valve allows automatic closure under specific circumstances such as air loss, system failure, etc., to ensure that the cylinder remains in the current position and prevent accidental movement of the cylinder piston, thereby improving the stability and reliability of the system. At the same time, the introduction of the filter pressure reducing valve can effectively filter out impurities and moisture in the compressed air to prevent them from damaging the internal components of the system.

[0010] In order to provide accurate position feedback, an angle connecting rod for feeding back the position of the cylinder is fixedly installed on the controllable positioner, and the other end of the angle connecting rod is fixedly connected to the piston rod of the cylinder. The angle connecting rod is directly connected to the piston rod of the cylinder and can provide real-time and accurate feedback on the current position of the cylinder. This direct physical connection ensures the accuracy and reliability of the position feedback, thereby improving the position control accuracy of the entire system.

[0011] Preferably, in order to facilitate the installation of the pneumatic actuator, a base is fixedly installed at the bottom of the cylinder; the design of the base allows the cylinder to be quickly connected to various installation platforms and brackets, greatly simplifying the installation process of the pneumatic actuator and improving installation efficiency.

[0012] Preferably, in order to simplify installation, a Y-type joint for connecting an external device is fixedly installed on the piston rod of the cylinder; the Y-type joint has a wide range of applicability and can be applied to various types of mechanical equipment, thereby enabling the pneumatic actuator to be applied to various types of mechanical equipment.

[0013] Preferably, in order to facilitate automatic control, the controllable positioner is an electrical positioner; the electrical positioner can support automatic control, thereby reducing the need for manual operation, and has a faster response speed, and can respond to control signals in a short time and adjust the position of the actuator.

[0014] Preferably, in order to ensure the stable operation of the switch valve, the air inlet of the switch valve is fixedly installed with a ferrule joint for connecting to an external air source; the design of the ferrule joint allows the switch valve to be quickly and easily connected to the external air source while effectively preventing gas leakage.

[0015] Preferably, in order to simplify the connection and optimize the wiring, a junction box for electrically connecting the controllable positioner, solenoid valve and pressure switch to external equipment is fixedly installed on one side of the cylinder; the junction box can bring together the lines of the controllable positioner, solenoid valve and pressure switch, thereby simplifying the lines and optimizing the wiring, which makes the connection between the cylinder and the external equipment neater and more orderly, reduces the possibility of line confusion and crossing, and improves the maintainability and safety of the entire device.

[0016] (III) Beneficial effects

[0017] The pneumatic actuator controls the opening and closing of the locking valve through the solenoid valve, controls the position of the cylinder piston rod through the positioner, and monitors the gas line pressure through the pressure switch, so that in the event of air loss or system failure, the locking valve can be automatically closed to ensure that the cylinder remains in the current position, prevent the cylinder piston from accidentally moving, and ensure the accuracy of the cylinder stop position;

[0018] The pneumatic actuator can provide real-time and accurate feedback of the current position of the cylinder through the angle connecting rod, thereby improving the position control accuracy of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a pneumatic actuator with controllable positioning Figure 1 ;

[0020] Figure 2 A schematic diagram of the structure of a pneumatic actuator with controllable positioning Figure 2 ;

[0021] Figure 3 A schematic diagram of the structure of a pneumatic actuator with controllable positioning Figure 3 .

[0022] In the figure:

[0023] 1. Cylinder; 11. Base; 12. Y-type connector;

[0024] 2. Controllable positioner; 21. Angle connecting rod;

[0025] 3. On-off valve; 31. Compression fitting;

[0026] 4. Filter pressure reducing valve;

[0027] 5. Pressure switch;

[0028] 6. Solenoid valve;

[0029] 7. Locking valve;

[0030] 8. Junction box. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The utility model provides a pneumatic actuator with controllable positioning, such as Figure 1 - Figure 3 As shown, the pneumatic actuator includes a cylinder 1 and a controllable positioner 2, a switch valve 3, a filter pressure reducing valve 4, a pressure switch 5, a solenoid valve 6 and a locking valve 7; the air inlet of the switch valve 3 is connected to the external air source, the air outlet of the switch valve 3 is connected to the air inlet of the filter pressure reducing valve 4, the air outlet of the filter pressure reducing valve 4 is connected to the air inlets of the pressure switch 5 and the solenoid valve 6 respectively, the air outlet of the pressure switch 5 is connected to the air inlet of the controllable positioner 2, the air outlet of the solenoid valve 6 is connected to the control interface of the locking valve 7, the air outlet of the controllable positioner 2 is connected to the air inlet of the locking valve 7, and the air outlet of the locking valve 7 is connected to the control interface of the cylinder 1; an angle connecting rod 21 for feedback of the position of the cylinder 1 is fixedly installed on the controllable positioner 2, and the other end of the angle connecting rod 21 is fixedly connected to the piston rod of the cylinder 1.

[0033] It should be noted that the solenoid valve 6 is connected to the output end of the central control system of the external device, and the controllable positioner 2 is bidirectionally connected to the central control system of the external device; this connection method enables the central control system to directly control the switching state of the solenoid valve 6, thereby realizing precise control of the movement of the cylinder 1. At the same time, the central control system can also monitor and adjust the position of the cylinder 1 in real time by receiving signals and controlling the controllable positioner 2, thereby realizing automatic control.

[0034] When in use, first open the switch valve 3, and the external air source will enter the filter pressure reducing valve 4 through the switch valve 3. At this time, the filter pressure reducing valve 4 will filter and reduce the pressure of the incoming gas. During this process, the pressure switch 5 will monitor the air pressure inside the system in real time and feed back the monitoring results to the central control system. Then, when the cylinder 1 needs to move, the central control system will send an opening signal to the solenoid valve 6. After the solenoid valve 6 is energized, it controls the locking valve 7 to open, allowing the gas to pass through the solenoid valve 6 from the filter pressure reducing valve 4 and enter the control interface of the locking valve 7. The locking valve 7 is opened, and the outlet gas of the controllable positioner 2 enters the control interface of the cylinder 1 through the locking valve 7, causing the piston rod of the cylinder 1 to perform corresponding telescopic movements. As the piston rod is extended and retracted, its The connected angle link 21 will also rotate accordingly. At this time, the controllable positioner 2 will transmit the position information of the piston rod of the cylinder 1 to the central control system in real time by detecting the rotation angle of the angle link 21. The central control system will use the received position information to accurately adjust the position of the piston rod of the cylinder 1 or perform other operations. When encountering a loss of air or a failure, the pressure switch 5 will first detect the loss of air and send a signal to the central control system. At this time, the central control system will send a corresponding signal to the solenoid valve 6, which will control the locking valve 7 to automatically close and maintain the locked state. When the air source is restored, the central control system will send a signal to the solenoid valve 6 again to control the locking valve 7 to open, thereby continuing to ensure the movement of the cylinder 1.

[0035] Specifically, a base 11 is fixedly installed at the bottom of the cylinder 1; due to the base 11 arranged at the bottom of the cylinder 1, the cylinder 1 can be easily fixed at any position using bolts or other connecting parts, so as to simplify the installation steps of the pneumatic actuator.

[0036] Furthermore, a Y-type connector 12 for connecting an external device is fixedly mounted on the piston rod of the cylinder 1; since the Y-type connector 12 has wide applicability, when the pneumatic actuator needs to be connected to an external device, the pneumatic actuator can be used by simply tightly connecting the external device to the Y-type connector 12.

[0037] Among them, in order to facilitate the realization of automatic control, the controllable positioner 2 is an electrical positioner; the electrical positioner can support automatic control, thereby reducing the need for manual operation, and has a faster response speed, and can respond to control signals in a short time and adjust the position of the actuator.

[0038] In addition, in order to ensure the stable operation of the switch valve 3, a ferrule joint 31 for connecting to an external gas source is fixedly installed at the air inlet of the switch valve 3; the design of the ferrule joint 31 allows the switch valve 3 to be quickly and easily connected to the external gas source. At the same time, the ferrule joint 31 can completely wrap the pipeline through its unique ferrule design, thereby effectively preventing gas leakage.

[0039] In addition, in order to simplify the connection and optimize the wiring, a junction box 8 is fixedly installed on one side of the cylinder 1 for electrically connecting the controllable positioner 2, the solenoid valve 6 and the pressure switch 5 to external equipment; the junction box 8 brings together the lines of the controllable positioner 2, the solenoid valve 6 and the pressure switch 5, thereby simplifying the lines and optimizing the wiring, which makes the connection between the cylinder 1 and the external equipment or the central control system neater and more orderly, reduces the possibility of line confusion and crossing, makes subsequent maintenance and inspection work more convenient, and improves the maintainability and safety of the entire device.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pneumatic actuator with controllable positioning, comprising a cylinder (1), characterized in that: The pneumatic actuator also includes a controllable positioner (2), a switch valve (3), a filter pressure reducing valve (4), a pressure switch (5), a solenoid valve (6) and a locking valve (7); The air inlet of the switch valve (3) is communicated with an external air source, the air outlet of the switch valve (3) is communicated with the air inlet of the filter pressure reducing valve (4), the air outlet of the filter pressure reducing valve (4) is communicated with the air inlets of the pressure switch (5) and the solenoid valve (6) respectively, the air outlet of the pressure switch (5) is communicated with the air inlet of the controllable positioner (2), the air outlet of the solenoid valve (6) is communicated with the control interface of the locking valve (7), the air outlet of the controllable positioner (2) is communicated with the air inlet of the locking valve (7), and the air outlet of the locking valve (7) is communicated with the control interface of the cylinder (1); An angle connecting rod (21) for feeding back the position of the cylinder (1) is fixedly mounted on the controllable positioner (2), and the other end of the angle connecting rod (21) is fixedly connected to the piston rod of the cylinder (1).

2. A pneumatic actuator with controllable positioning according to claim 1, characterized in that: A base (11) is fixedly mounted on the bottom of the cylinder (1).

3. A pneumatic actuator with controllable positioning according to claim 1, characterized in that: A Y-type connector (12) for connecting to external equipment is fixedly mounted on the piston rod of the cylinder (1).

4. A pneumatic actuator with controllable positioning according to claim 1, characterized in that: The controllable positioner (2) is an electrical positioner.

5. The pneumatic actuator with controllable positioning according to claim 1, characterized in that: A ferrule joint (31) for connecting to an external air source is fixedly mounted on the air inlet of the switch valve (3).

6. A pneumatic actuator with controllable positioning according to claim 1, characterized in that: A junction box (8) for electrically connecting the controllable positioner (2), the solenoid valve (6) and the pressure switch (5) to external equipment is fixedly mounted on one side of the cylinder (1).

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