Air path control device of pneumatic actuating mechanism
By introducing components such as filter pressure reducing valves, reversing valves, and check valves into pneumatic actuators, gas circulation is achieved, solving the problems of corrosion and malfunction of pneumatic piston actuators in humid environments, and improving the safety and stability of chemical plants.
Patent Information
- Application Number
- CN202520552794.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-03-27
AI Technical Summary
In chemical plants, pneumatic piston actuators are susceptible to corrosion from humid air in humid environments, leading to condensation, corrosion, and damage to seals, which affects the stable operation of the plant. Furthermore, they may malfunction at low temperatures. Existing periodic inspection methods are insufficient to comprehensively cover a large number of actuators.
A pneumatic actuator air path control device was designed. By setting up components such as filter pressure reducing valve, reversing valve, solenoid valve and check valve, the gas is ensured to circulate in the actuator and external gas is prevented from entering. A bidirectional air path connection is adopted in the piston cylinder internal chamber to prevent gas from entering the actuator under different conditions.
It effectively prevents external gas from entering the pneumatic actuator, avoiding corrosion and malfunction, improving the safety and stability of the device, and eliminating the need for regular inspections.
Smart Images
Figure CN223725005U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of gas circuit control device, concretely is a pneumatic actuator gas circuit control device. BACKGROUND
[0002] At present, the chemical device is usually selected in the occasion of reliable instrument gas source Pneumatic actuator, and it is mainly pneumatic piston type. The pneumatic piston type is spring return single action structure, and the spring return single action structure piston type actuator is usually connected with the atmosphere in the spring structure in one side piston cylinder body, and one side piston cylinder body is used for connecting instrument gas source to provide the working mode of losing gas - opening or losing gas - closing.
[0003] The spring return single action structure piston type actuator is connected with the atmosphere in one side cylinder, according to the action principle of piston type actuator, the cylinder connected with the atmosphere will exchange with the atmosphere in the opening and closing process of actuator, which may cause wet air to enter the cylinder and then condense into liquid phase and remain in the cylinder, especially in the seaside humid environment, the situation is more obvious, when the condensate in the cylinder accumulates to a certain degree, it will cause corrosion, rust and other problems in the cylinder, and when the ambient temperature is lower than 0 DEG C, the condensate in the cylinder will freeze and cause the sealing ring of the cylinder to be damaged, and the cylinder "string gas", the spring force cannot overcome the spring force, the spring reset makes the valve "misoperation", and finally leads to the production fluctuation of device.
[0004] For the water in the cylinder of the actuator, the method of regular inspection is generally adopted, but the number of chemical device actuators is huge, and the structure of the actuator is not the same, so there may be the situation of incomplete and incomplete inspection, which brings certain risk and hidden danger to the safe and stable operation of the chemical device. INVENTION CONTENTS
[0005] In order to solve the technical problems mentioned in the background art, the utility model provides a pneumatic actuator gas circuit control device, which adopts the technical scheme as follows:
[0006] The utility model discloses a pneumatic actuator gas circuit control device, which comprises a pneumatic actuator, a piston cylinder, a piston rod, a piston, a spring, an air inlet line, an air outlet line and a piston cylinder.
[0007] Further, the air inlet line comprises a first air inlet line, a filter pressure reducing valve and a reversing valve are arranged on the first air inlet line, a second air inlet line is arranged on the first air inlet line, an electromagnetic valve is arranged on the second air inlet line, a third air inlet line is arranged on the reversing valve, and the third air inlet line is connected with the right end of the piston cylinder.
[0008] Further, the air outlet line comprises a first air outlet line connected with the left end of the piston cylinder, a one-way valve is arranged on the first air outlet line, a second air outlet line is arranged on the first air outlet line and located on the upside of the one-way valve, and the second air outlet line is connected with the reversing valve.
[0009] The utility model has the advantages that when the air inlet line is opened, the gas enters the chamber on the right side of the piston in the piston cylinder through the air inlet line, the spring is compressed, the piston and the piston rod move to the left, the gas in the chamber on the left side of the piston in the piston cylinder enters the air outlet line, the gas in the air outlet line is discharged, then the air outlet line is closed, the external gas cannot enter the chamber on the left side of the piston in the piston cylinder through the air outlet line, when the air inlet line is closed, the air outlet line is connected with the air inlet line, the gas in the chamber on the right side of the piston in the piston cylinder returns to the chamber on the left side of the piston in the piston cylinder through the air inlet line and the air outlet line, so that no matter the pneumatic actuator is in the state of stretching or shrinking, the external gas cannot enter the pneumatic actuator, the pneumatic actuator of the utility model does not need to be checked regularly, and the external gas can be prevented from entering the pneumatic actuator when the pneumatic actuator is used or closed, so that the pneumatic actuator is prevented from being eroded by the external gas and cannot be used. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 The utility model discloses a schematic diagram Figure 1 ;
[0011] Figure 2 The utility model discloses a schematic diagram Figure 2 .
[0012] The drawings show that 1 is a piston cylinder, 2 is a piston rod, 3 is a piston, 4 is a first air inlet line, 5 is a filter pressure reducing valve, 6 is a reversing valve, 7 is a second air inlet line, 8 is an electromagnetic valve, 9 is a third air inlet line, 10 is a first air outlet line, 11 is a one-way valve, 12 is a second air outlet line, and 13 is a spring. DETAILED DESCRIPTION
[0013] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the range protected by the utility model.
[0014] Please refer to Figures 1-2 The utility model discloses a pneumatic actuator gas circuit control device, including pneumatic actuator, pneumatic actuator includes piston cylinder 1, be provided with piston rod 2 in piston cylinder 1, be provided with piston 3 of the sliding seal that forms with piston cylinder 1 inner wall on piston rod 2, be provided with spring 13 in piston cylinder 1, spring 13 is located piston rod 2 outside, piston 3 moves when being compressed by gas pressure, and drives piston rod 2 to move, spring 13 is compressed or stretches, one side of piston cylinder 1 is provided with intake line, and external gas enters piston cylinder 1 through intake line, and one end of intake line is connected with the right end of piston cylinder 1, and the other side of piston cylinder 1 is provided with outlet line, and outlet line is connected with the left end of piston cylinder 1, and outlet line is connected with intake line, and the gas in the left chamber of piston 3 in piston cylinder 1 is discharged through outlet line, and outlet line is also connected with the chamber of left part and the chamber of right part of piston cylinder 1 through the connection with intake line.
[0015] Intake line includes first intake pipeline 4, be provided with filter pressure reducing valve 5 and reversing valve 6 on first intake pipeline 4, and filter pressure reducing valve 5 filters and reduces the pressure of external gas, and reversing valve 6 switches the flow direction of gas, be provided with second intake pipeline 7 on first intake pipeline 4, be provided with electromagnetic valve 8 on second intake pipeline 7, and electromagnetic valve 8 controls the switch of line, be provided with third intake pipeline 9 on reversing valve 6, and third intake pipeline 9 is connected with the right end of piston cylinder 1.
[0016] Outlet line includes first outlet pipeline 10 connected with the left end of piston cylinder 1, be provided with check valve 11 on first outlet pipeline 10, and the gas in the chamber of left part of piston cylinder 1 enters check valve 11 through first outlet pipeline 10, and check valve 11 opens under the impact of gas pressure, and exhaust gas, and check valve 11 is automatically closed after the exhaust of gas, be provided with second outlet pipeline 12 on first outlet pipeline 10 and check valve 11 upside, and second outlet pipeline 12 is connected with reversing valve 6, and when reversing valve 6 switches the flow direction of gas, the gas in the right chamber of piston cylinder 1 enters the chamber of left part of piston cylinder 1 through reversing valve 6.
[0017] The utility model discloses a working principle as follows: when pneumatic actuator needs to start, open filter pressure reducing valve 5 and solenoid valve 8, and the airflow passes through filter pressure reducing valve 5 and is filtered to one way through first inlet pipeline 4 and enters into reversing valve 6, and in this way control reversing valve 6 changes the airflow direction, and makes the airflow of another way through second inlet pipeline 7 and solenoid valve 8 also enter reversing valve 6 and can enter third inlet pipeline 9, and at this time, reversing valve 6 and second outlet pipeline 12 are closed state, and the airflow that enters piston cylinder 1 through third inlet pipeline 9 is located at the right part of piston 3, and piston 3 is extruded by air pressure, and piston 3 drives piston rod 2 to move to left together, and spring 3 is compressed, and at this time, the airflow in the left chamber of piston cylinder 1 passes through first outlet pipeline 10 and enters one-way valve 11, and one-way valve 11 opens, and exhausts gas, and when the gas in the left chamber of piston cylinder 1 is exhausted, the valve core of one-way valve 11 resets, and one-way valve 11 closes, and external air cannot enter the left chamber of piston cylinder 1 through one-way valve 11.
[0018] When needing to close pneumatic actuator, close filter pressure reducing valve 5 and solenoid valve 8, and piston 3 is rebounded by spring 13 elastic force, drives piston rod 2 to move to left, and the gas in the right chamber of piston cylinder 1 is extruded and returns to flow into reversing valve 6 through third inlet pipeline 9, and reversing valve 6 switches the airflow direction, and makes reversing valve 6 and second outlet pipeline 12 communicate, and then the gas in the right chamber of piston cylinder 1 flows into the left chamber of piston cylinder 1 through third inlet pipeline 9 and second outlet pipeline 12.
[0019] The utility model discloses simple operation, convenient to use is suitable for overall popularization and application. Although the embodiment of the utility model has been shown and described, for the ordinary skilled person in the art, can understand that these embodiments can be changed, modified, replaced and changed in many ways without departing from the principle and spirit of the utility model, and the scope of the utility model is defined by the appended claims and its equivalents.
Claims
1. A kind of pneumatic actuator gas path control device, including pneumatic actuator, pneumatic actuator includes piston cylinder (1), piston rod (2) is arranged in piston cylinder (1), piston rod (2) is provided with the piston (3) that the sliding seal is formed with the inner wall of piston cylinder (1), spring (13) is arranged in piston cylinder (1), spring (13) is located the outside of piston rod (2), it is characterized in that, The piston cylinder (1) is provided with an air inlet line on one side, one end of the air inlet line is connected with the right end of the piston cylinder (1), the piston cylinder (1) is provided with an air outlet line on the other side, the air outlet line is connected with the left end of the piston cylinder (1), and the air outlet line is connected with the air inlet line.
2. The pneumatic actuator control device according to claim 1, wherein The air inlet line comprises a first air inlet pipeline (4), the first air inlet pipeline (4) is provided with a filter pressure reducing valve (5) and a reversing valve (6), the first air inlet pipeline (4) is provided with a second air inlet pipeline (7), the second air inlet pipeline (7) is provided with an electromagnetic valve (8), the reversing valve (6) is provided with a third air inlet pipeline (9), and the third air inlet pipeline (9) is connected with the right end of the piston cylinder (1).
3. The pneumatic actuator control device according to claim 2, wherein The air outlet line comprises a first air outlet pipeline (10) connected with the left end of the piston cylinder (1), the first air outlet pipeline (10) is provided with a check valve (11), the first air outlet pipeline (10) is provided with a second air outlet pipeline (12) on the upside of the check valve (11), and the second air outlet pipeline (12) is connected with the reversing valve (6).