A multi-channel pneumatic actuator

Abstract

The utility model discloses a kind of multi-channel pneumatic actuators, it is related to pneumatic actuator technical field, including cylinder body, the front end of cylinder body is equipped with two-position five-way valve, the lower end both sides of two-position five-way valve are connected with exhaust pipe, muffler is connected on exhaust pipe, cylinder body is equipped with reset component;The utility model is through reset spring and the cooperation of two-position five-way valve, it is convenient to make pneumatic actuator have single / dual action mode switching capacity, it is convenient to make device lose gas, whatever mode can still be automatically reset after;Through the cooperation of adjusting bolt and limit block, it is convenient to control the rotation of limit block, it is convenient to adjust the maximum rotation angle of piston rod;Through the above structure, the mode switching of existing pneumatic actuator is not flexible, cannot satisfy the demand of daily dual action high efficient stability, while retaining single action safety reset function.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic actuator technology, and in particular to a multi-channel pneumatic actuator. Background Technology

[0002] Pneumatic actuators are devices that convert compressed air energy into mechanical linear or rotary motion. They are used to drive the opening, closing, and regulation of various industrial valves and are widely used in process industries such as chemical, power, water treatment, and oil and gas. Due to their explosion-proof, clean, and high reliability, they have become key actuators for automation control. Existing traditional single-acting pneumatic actuators rely on air pressure on one side for driving and a return spring on the other side for reset. While the structure is simple, it has drawbacks. Reset relies solely on spring force, and if the spring fatigues or the valve jams, reset failure is likely. Furthermore, the spring force varies with the compression, resulting in unstable operating speed and long response time. While double-acting actuators can solve the above problems through bidirectional air pressure drive, they lack the automatic reset function of single-acting actuators in case of air loss, limiting their applicability. Therefore, improvements are needed to address the aforementioned issues. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-channel pneumatic actuator.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a multi-channel pneumatic actuator, including a cylinder body, a two-position five-way valve installed at the front end of the cylinder body, exhaust pipes connected to both sides of the lower end of the two-position five-way valve, a muffler connected to the exhaust pipes, and a reset assembly provided in the cylinder body.

[0005] Preferably, multiple connectors are installed on both sides and the rear end of the cylinder body and on the upper and lower ends of the two-position five-way valve. The two connectors at the upper end of the two-position five-way valve are respectively connected to a first connecting pipe and a second connecting pipe. The rear end of the first connecting pipe is connected to a three-way pipe. The two sides of the three-way pipe are connected to a third connecting pipe. The other end of the third connecting pipe is respectively connected to the connectors on both sides of the cylinder body. The other end of the second connecting pipe is connected to the connector at the rear end of the cylinder body, and the second connecting pipe is positioned below the third connecting pipe.

[0006] Preferably, a piston rod is vertically rotatably connected to the middle of the cylinder body, the lower end of the piston rod passes through the cylinder body, and a gear is fixedly connected to the middle of the piston rod; a limit block is fixedly connected to the upper end of the piston rod, a circular groove is opened at the upper end of the cylinder body, the limit block is placed in the circular groove, and an external thread groove is opened at the lower end of the piston rod.

[0007] Preferably, the reset assembly includes piston discs that slide on both sides inside the cylinder. The two piston discs have toothed grooves at their proximal ends for meshing with gears, and sealing grooves are provided on the distal ends of the piston discs. A sealing ring is installed in the sealing groove.

[0008] Preferably, multiple return springs are installed on both sides of the inside of the cylinder, and the near ends of the return springs on both sides are respectively connected to two piston discs.

[0009] Preferably, two adjusting bolts are threaded to the upper middle part of the rear end face of the cylinder, and the two adjusting bolts are respectively placed on both sides of the rear end of the limiting block.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: In this utility model, the cooperation between the return spring and the two-position five-way valve facilitates the pneumatic actuator to switch between single and double-acting modes, and ensures that the device can still automatically reset regardless of the mode after air loss; the cooperation between the adjusting bolt and the limit block facilitates the control of the rotation of the limit block and the adjustment of the maximum rotation angle of the piston rod; the cooperation between the gear and the piston disc facilitates the conversion of the linear motion of the piston disc into the rotational motion of the piston rod, and facilitates the control of the piston rod rotation through the air path change of the two-position five-way valve; the above structure solves the problem of the inflexible mode switching of existing pneumatic actuators, which cannot meet the high efficiency and stability of daily double-acting operation, while retaining the safety reset function of single-acting operation. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional schematic diagram of the overall structure proposed in this utility model; Figure 2 This is a schematic diagram of the overall structure proposed in this utility model from another perspective; Figure 3 This is a cross-sectional view of the overall structure proposed in this utility model; Figure 4 This is a cross-sectional schematic diagram of the cylinder block structure proposed in this utility model; Figure 5 This is a schematic diagram of the internal structure connection state proposed in this utility model.

[0012] The numbers in the diagram are: 1. Cylinder block; 2. Two-position five-way valve; 3. Muffler; 4. Connector; 5. T-pipe; 6. Return spring; 7. Piston disc; 8. Piston rod; 9. Gear; 10. Limit block; 11. Adjusting bolt. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Example: See Figures 1 to 5 This utility model discloses a multi-channel pneumatic actuator, comprising a cylinder body 1. A two-position five-way valve 2 is installed at the front end of the cylinder body 1. Exhaust pipes are connected to both sides of the lower end of the two-position five-way valve 2, and a muffler 3 is connected to the exhaust pipes. The cylinder body 1 is equipped with a reset assembly, which facilitates automatic reset and closure of the valve after air loss. Multiple connectors 4 are installed on both sides and the rear end of the cylinder body 1 and at the upper and lower ends of the two-position five-way valve 2. The two connectors 4 at the upper end of the two-position five-way valve 2 are respectively connected to a first connecting pipe and a second connecting pipe. A three-way pipe 5 is connected to the rear end of the first connecting pipe. A third connecting pipe is connected to both sides of the three-way pipe 5. The other side of the third connecting pipe... The first end is connected to the connector 4 on both sides of the cylinder body 1. The other end of the second connecting pipe is connected to the connector 4 at the rear end of the cylinder body 1, and the second connecting pipe is placed below the third connecting pipe. The connector 4 facilitates the sealing of the interfaces of multiple connecting pipes. A piston rod 8 is vertically rotatably connected to the middle of the cylinder body 1. The lower end of the piston rod 8 passes through the cylinder body 1, and a gear 9 is fixedly connected to the middle of the piston rod 8. A limit block 10 is fixedly connected to the upper end of the piston rod 8. A circular rotating groove is opened at the upper end of the cylinder body 1, and the limit block 10 is placed in the circular rotating groove. An external thread groove is opened at the lower end of the piston rod 8. The rotating groove facilitates the rotation of the limit block 10, thereby controlling the rotation angle of the piston rod 8.

[0015] In this invention, the reset assembly includes piston discs 7 that slide on both sides inside the cylinder body 1. The proximal ends of the two piston discs 7 are provided with toothed grooves for meshing with gears 9, and the distal ends of the piston discs 7 are provided with sealing grooves containing sealing rings. The toothed grooves and gears 9 facilitate the conversion of the linear movement of the piston discs 7 into the rotation of the piston rod 8. Multiple reset springs 6 are installed on both sides inside the cylinder body 1, with the proximal ends of the reset springs 6 connected to the two piston discs 7. The reset springs 6 facilitate the automatic reset of the piston rod 8 after air loss. Two adjusting bolts 11 are threadedly connected to the upper center of the rear end face of the cylinder body 1. The two adjusting bolts 11 are respectively placed on both sides of the rear end of the limiting block 10. The adjusting bolts 11 facilitate the restriction of the rotation of the limiting block 10, thereby controlling the maximum rotation angle of the piston rod 8.

[0016] Working Principle: When using this invention, first connect each connecting pipe to the connector 4. In single-acting mode, air enters through the connector 4 at the lower end of the two-position five-way valve 2 and exits through the connector 4 on the other side of the upper end. Then, high-pressure gas enters the middle of the cylinder 1 through the second connecting pipe, thereby pushing the piston discs 7 on both sides to compress the return springs 6 and move them outward. Then, the gear 9 meshing with the piston discs 7 controls the rotation of the piston rod 8, thereby controlling the valve connected to the lower end of the piston rod 8 to open. When the air supply stops, the return springs 6 on both sides of the cylinder 1 generate elastic force to squeeze the piston discs 7, thereby causing the gas in the middle of the cylinder 1 to flow back, thus resetting the device and closing the valve. When it is necessary to change the mode to double-acting mode, high-pressure gas first enters from the connector 4 at the lower end of the two-position five-way valve 2 and exits through the connector 4 on the other side of the upper end. 4. The piston rod 8 is rotated by pushing the piston disc 7 inside the cylinder 1 through the second connecting pipe into the middle of the cylinder body 1. When it is necessary to close the valve, the piston inside the two-position five-way valve 2 is controlled by energizing the electromagnetic coil, thereby changing the gas flow path inside it. The gas enters from the lower end of the two-position five-way valve 2 and flows through the three-way pipe 5 and the third connecting pipe from the upper side connector 4 into the two sides of the cylinder body 1. This works with the return spring 6 to press the piston disc 7 into its reset position, thereby causing the piston rod 8 to reverse and reset, closing the valve. At the same time, the gas in the middle of the cylinder body 1 flows back from the second connecting pipe and enters the exhaust pipe after being squeezed by the two sides. After being silenced by the muffler 3, it is discharged. However, if it is necessary to change the rotation angle of the piston rod 8, it is only necessary to control its extension length by rotating the adjusting bolt 11.

[0017] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-channel pneumatic actuator, comprising a cylinder (1), characterized in that: The cylinder body (1) is equipped with a two-position five-way valve (2) at the front end. The two-position five-way valve (2) is connected to exhaust pipes on both sides of its lower end. A muffler (3) is connected to the exhaust pipe. The cylinder body (1) is provided with a reset assembly. Multiple connectors (4) are installed on both sides of the cylinder body (1), the rear end, and the upper and lower ends of the two-position five-way valve (2). The two connectors (4) at the upper end of the two-position five-way valve (2) are respectively connected to a first connecting pipe and a second connecting pipe. A three-way pipe (5) is connected to the rear end of the first connecting pipe.

2. The multi-channel pneumatic actuator according to claim 1, characterized in that: The three-way pipe (5) is connected to the third connecting pipe on both sides. The other end of the third connecting pipe is connected to the connector (4) on both sides of the cylinder (1). The other end of the second connecting pipe is connected to the connector (4) at the rear end of the cylinder (1). The second connecting pipe is positioned below the third connecting pipe.

3. A multi-channel pneumatic actuator according to claim 2, characterized in that: A piston rod (8) is vertically rotatably connected to the middle of the cylinder (1). The lower end of the piston rod (8) passes through the cylinder (1), and a gear (9) is fixedly connected to the middle of the piston rod (8). A limit block (10) is fixedly connected to the upper end of the piston rod (8). A circular rotating groove is opened at the upper end of the cylinder (1), and the 10 is placed in a square rotating groove. An external thread groove is opened at the lower end of the 8.

4. A multi-channel pneumatic actuator according to claim 3, characterized in that: The reset assembly includes piston discs (7) that slide on both sides inside the cylinder (1). The two piston discs (7) have tooth grooves at their proximal ends for meshing with gears (9). The piston discs (7) also have sealing grooves at their distal ends, and sealing rings are installed in the sealing grooves.

5. A multi-channel pneumatic actuator according to claim 4, characterized in that: Multiple return springs (6) are installed on both sides of the inside of the cylinder (1), and the near ends of the return springs (6) on both sides are connected to two piston discs (7).

6. A multi-channel pneumatic actuator according to claim 5, characterized in that: Two adjusting bolts (11) are threadedly connected to the upper middle part of the rear end face of the cylinder (1), and the two adjusting bolts (11) are respectively placed on both sides of the rear end of the limiting block (10).

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