Speed regulating device of pneumatic actuating mechanism

Abstract

The utility model discloses a pneumatic actuating mechanism speed regulating device which comprises an air source, an electromagnetic valve and a pneumatic actuating mechanism, the common end of the electromagnetic valve is respectively connected with one end of a first throttle valve and one end of a one-way valve, the other end of the first throttle valve is connected with the other end of the one-way valve, the common connecting end of the first throttle valve is connected with the pneumatic actuating mechanism, and the air inlet end of the electromagnetic valve is connected with the air source. The exhaust end of the electromagnetic valve is connected with the second throttling valve. According to the utility model, the first throttle valve and the second throttle valve are adjusted to change the air inlet flow and the air outlet flow of the pneumatic actuating mechanism and change the action speed of the pneumatic actuating mechanism, so that the action speed of an accessory device driven by the pneumatic actuating mechanism is changed, the controllability of the action speed of a control part is improved, the structure is simple and reasonable, and the practicability is high. The practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic actuators, and more specifically, to a speed regulating device for a pneumatic actuator. Background Art

[0002] Some factories have high automation requirements in the production process and will configure a large number of automatic action components in the production equipment, such as fluid control valves. Different work sections or different media in a set of production equipment have different requirements for the action speed of the control valves, so different work sections are often required to configure corresponding air circuits for their control actuators. However, most of the existing pneumatic actuators can only realize the full closing and full opening operations of the valve, and cannot adjust the speed of opening and closing actions, which affects the versatility and maintenance efficiency of automatic equipment.

[0003] Therefore, it is necessary to propose a new solution to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a pneumatic actuator speed control device, which changes the air intake flow and exhaust flow of the pneumatic actuator by adjusting the first throttle valve and the second throttle valve, changes the action speed of the pneumatic actuator, and thus changes the action speed of the auxiliary device driven by the pneumatic actuator.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pneumatic actuator speed control device comprises an air source, a solenoid valve and a pneumatic actuator, wherein the common end of the solenoid valve is respectively connected to one end of a first throttle valve and one end of a one-way valve, the other end of the first throttle valve is connected to the other end of the one-way valve, and the common connection end is connected to the pneumatic actuator, the air inlet end of the solenoid valve is connected to the air source, and the exhaust end of the solenoid valve is connected to the second throttle valve.

[0007] Furthermore, the pneumatic actuator is a cylinder, including a cylinder body and a piston arranged in the cylinder body. The common connection end of the first throttle valve and the one-way valve is connected to the air cavity on one side of the piston. The other side of the piston is connected to a piston rod. The piston rod sleeve is provided with a spring. One end of the spring abuts the other side of the piston, and the other end of the spring abuts the inner wall of the cylinder body.

[0008] Furthermore, the air inlet end of the solenoid valve is connected to the air source through a filter pressure reducing valve.

[0009] The beneficial effects of the utility model are as follows: in the utility model, the first throttle valve and the second throttle valve are adjusted to change the air intake flow and the exhaust flow of the pneumatic actuator, change the action speed of the pneumatic actuator, thereby changing the action speed of the auxiliary device driven by the pneumatic actuator, thereby improving the controllability of the action speed of the control component, and the structure is simple and reasonable, and the practicality is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of the structure of the pneumatic actuator speed control device in this embodiment.

[0011] Figure numerals: air source 1, solenoid valve 2, pneumatic actuator 3, cylinder 301, piston 302, air chamber 303, piston rod 304, spring 305, first throttle valve 4, one-way valve 5, second throttle valve 6, filter pressure reducing valve 7, compressed air pipeline 8. DETAILED DESCRIPTION

[0012] 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.

[0013] Embodiment: A pneumatic actuator speed regulating device, such as Figure 1 As shown, it includes an air source 1, a solenoid valve 2 and a pneumatic actuator 3. The common end of the solenoid valve 2 is connected to one end of a first throttle valve 4 and one end of a one-way valve 5 respectively through a compressed air pipeline 8. The other end of the first throttle valve 4 is connected to the other end of the one-way valve 5 through a compressed air pipeline 8, and its common connection end is connected to the pneumatic actuator 3 through a compressed air pipeline 8. The air inlet end of the solenoid valve 2 is connected to the air source 1 through the compressed air pipeline 8, and the exhaust end of the solenoid valve 2 is connected to the second throttle valve 6 through the compressed air pipeline 8. The solenoid valve 2 is connected to a controller or button for controlling the opening and closing of the solenoid valve 2.

[0014] When the pneumatic actuator 3 needs to be actuated, an action instruction is issued by pressing a button or the controller. After receiving the electrical signal, the solenoid valve 2 switches the connecting air path. The compressed air output by the air source 1 passes through the solenoid valve 2 and then enters the pneumatic actuator 3 through the first throttle valve 4, thereby pushing the pneumatic actuator 3 to act. At this time, the air intake flow rate of the cylinder air chamber 303 can be changed by adjusting the opening of the first throttle valve 4, that is, when the first throttle valve 4 is closed, the air intake flow rate decreases, and the action speed of the pneumatic actuator 3 slows down. When the first throttle valve 4 is opened, the air intake flow rate increases, and the action speed of the pneumatic actuator 3 speeds up, thereby setting the speed at which the pneumatic actuator 3 needs to act.

[0015] When the pneumatic actuator 3 needs to move in the opposite direction, an action instruction is issued by pressing a button or controlling. After the solenoid valve 2 receives the power-off signal, it switches the connecting air path. Since the air source 1 is cut off at this time, the compressed air in the cylinder cavity 303 passes through the one-way valve 5 and then enters the second throttle valve 6 through the solenoid valve 2. The second throttle valve 6 exhausts outward, and the pneumatic actuator 3 is reset by the spring 305. At this time, the exhaust flow rate of the cylinder cavity 303 can be changed by adjusting the opening of the second throttle valve 6. That is, when the second throttle valve 6 is closed, the exhaust flow rate decreases and the action speed of the pneumatic actuator 3 slows down. When the second throttle valve 6 is opened, the exhaust flow rate increases and the action speed of the pneumatic actuator 3 is accelerated. In this way, the speed of the resetting action of the pneumatic actuator 3 can be set.

[0016] Preferably, the air inlet end of the solenoid valve 2 is connected to the air source 1 via a filter pressure reducing valve 7. The filter pressure reducing valve 7 is used to stabilize the pressure of the compressed air provided by the air source 1 and to filter moisture or impurities in the compressed air.

[0017] Furthermore, the pneumatic actuator 3 is a cylinder, including a cylinder body 301 and a piston 302 arranged in the cylinder body 301. The piston 302 is slidably connected to the inner cavity of the cylinder body 301 and forms an air cavity 303 with the inner cavity of the cylinder body 301. The common connection end of the first throttle valve 4 and the one-way valve 5 is connected to the air cavity 303 on one side of the piston 302. The other side of the piston 302 is connected to a piston rod 304. The end of the piston rod 304 extends to the outside of the cylinder body 301 and is used to connect the attached auxiliary device (automatic action component), such as a fluid control valve; the piston rod 304 is sleeved with a spring 305, and the spring 305 is located in the inner cavity of the cylinder body 301. One end of the spring 305 abuts the other side of the piston 302, and the other end of the spring 305 abuts the inner wall of the cylinder body 301.

[0018] When the solenoid valve 2 receives the power signal, it switches the connecting air path. The compressed air output by the air source 1 passes through the solenoid valve 2 and enters the cylinder cavity 303 through the first throttle valve 4. The air pressure in the cylinder cavity 303 increases, causing the piston 302 to move to the right. The movement of the piston 302 drives the piston rod 304 to move synchronously, so that the piston rod 304 acts on the automatic action component. At this time, the spring 305 is compressed; when the solenoid valve 2 receives the power-off signal, it switches the connecting air path. At this time, the air source 1 is cut off. The piston 302 moves to the left under the action of the restoring force of the spring 305, and the compressed air in the cavity 303 is pressed toward the one-way valve 5. At the same time, the movement of the piston 302 drives the piston rod 304 to move synchronously, so that the piston rod 304 acts on the automatic action component in the opposite direction. At this time, the cylinder is reset.

[0019] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A pneumatic actuator speed regulating device, comprising an air source (1), a solenoid valve (2) and a pneumatic actuator (3), characterized in that: The common end of the solenoid valve (2) is respectively connected to one end of the first throttle valve (4) and one end of the one-way valve (5); the other end of the first throttle valve (4) is connected to the other end of the one-way valve (5); and the common connection end is connected to the pneumatic actuator (3); the air inlet end of the solenoid valve (2) is connected to the air source (1); and the air outlet end of the solenoid valve (2) is connected to the second throttle valve (6).

2. A pneumatic actuator speed regulating device according to claim 1, characterized in that: The pneumatic actuator (3) is a cylinder, comprising a cylinder body (301) and a piston (302) arranged in the cylinder body (301); the common connection end of the first throttle valve (4) and the one-way valve (5) is connected to the air cavity (303) on one side of the piston (302); the other side of the piston (302) is connected to a piston rod (304); the piston rod (304) is sleeved with a spring (305); one end of the spring (305) abuts against the other side of the piston (302), and the other end of the spring (305) abuts against the inner wall of the cylinder body (301).

3. A pneumatic actuator speed regulating device according to claim 1, characterized in that: The air inlet end of the solenoid valve (2) is connected to the air source (1) via a filter pressure reducing valve (7).

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