Pneumatic actuating mechanism of multi-rotation valve

Abstract

The utility model relates to the technical field of valves, in particular to a multi-rotation valve pneumatic actuating mechanism which can automatically rotate a hand wheel on a gate valve when the gate valve is opened and closed, reduces labor intensity, and is convenient to use and high in practicability. Comprising a bottom plate and a gate valve, the gate valve is installed at the upper end of the bottom plate and provided with a hand wheel, and opening and closing of the gate valve are controlled through rotation of the hand wheel; the device further comprises a sliding column, a connecting column and a driving mechanism, the sliding column is fixedly installed at the upper end of the hand wheel, the upper portion of the sliding column is installed on the connecting column in an up-down sliding mode, the connecting column is installed on the driving mechanism, the driving mechanism is used for driving the connecting column to rotate, and the sliding column, the connecting column and the hand wheel are coaxial.

Description

Technical Field

[0001] This utility model relates to the technical field of valves, and in particular to a pneumatic actuator for a multi-turn valve. Background Technology

[0002] Gate valves are common valves widely used in chemical and mechanical fields. They control fluid transport by controlling the position of a gate. In the prior art, utility model patent application number 202222057338.3 discloses a gate valve, mainly composed of a valve body, a screw, and a handwheel. The screw is installed on the upper part of the valve body, and the handwheel is installed on the upper end of the screw. To control the opening and closing of the valve body, the operator rotates the handwheel, which in turn rotates the screw, controlling the movement of the gate and other mechanisms inside the valve body, thus controlling the flow of fluid within the valve body. However, this design has the following problems: controlling the opening and closing of the valve body requires manual rotation of the handwheel. For some large valves, the operator needs to rotate the handwheel many times to fully open or close the valve, which is extremely labor-intensive and inconvenient. Therefore, an automatic valve opening and closing actuator is needed. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a multi-turn valve pneumatic actuator that can automatically rotate the handwheel on the gate valve when opening and closing the gate valve, reducing labor intensity, and is easy to use and highly practical.

[0004] This utility model relates to a multi-turn valve pneumatic actuator, comprising a base plate and a gate valve. The gate valve is mounted on the upper end of the base plate and has a handwheel. The opening and closing of the gate valve is controlled by rotating the handwheel. It also includes a sliding column, a connecting column, and a drive mechanism. The sliding column is fixedly mounted on the upper end of the handwheel, and its upper part slides vertically on the connecting column. The connecting column is mounted on the drive mechanism, which drives the connecting column to rotate. The sliding column, connecting column, and handwheel are coaxial. The drive mechanism is connected to an external controller. When controlling the opening and closing of the gate valve, the controller controls the drive mechanism to rotate the connecting column. The connecting column, through the sliding column, rotates the handwheel, thus controlling the opening and closing of the gate valve. This mechanism automatically rotates the handwheel on the gate valve when opening and closing, reducing labor intensity, making it convenient to use and highly practical.

[0005] Preferably, the drive mechanism includes a pneumatic motor, a lifting frame, an output shaft, and an air supply mechanism. The pneumatic motor is fixedly mounted on the lifting frame and has two air holes. An output shaft is located at the output end of the pneumatic motor, and a connecting column is fixedly mounted at the lower end of the output shaft. The air supply mechanism communicates with the two air holes. The lifting frame is fixedly mounted on an external support. When the connecting column rotates, air is supplied to one of the air holes through the air supply mechanism. The gas enters the pneumatic motor and exits through the other air hole. Simultaneously, the gas, after entering the pneumatic motor, drives the output shaft to rotate through an impeller or other structure within the motor, thereby causing the output shaft to rotate the connecting column. When the air supply mechanism switches to supplying air to the other air hole, the output shaft rotates in the opposite direction. The rotation direction of the output shaft can be adjusted as needed, improving convenience.

[0006] Preferably, the air supply mechanism includes a conveying mechanism, an air pump, an air inlet pipe, and an air outlet pipe. The input end of the air pump is connected to the air inlet pipe, and the output end of the air pump is connected to the air outlet pipe. The air outlet pipe is connected to two air holes through the conveying mechanism. When the output shaft on the pneumatic motor is rotated, the air pump is turned on, allowing air to enter the conveying mechanism sequentially through the air inlet pipe, the air pump, and the air outlet pipe. Then, the gas enters one of the air holes through the conveying mechanism, and then enters the pneumatic motor through the other air hole, thereby driving the output shaft on the pneumatic motor to rotate. Finally, the gas is discharged through the other air hole on the pneumatic motor.

[0007] Preferably, the conveying mechanism includes a discharge pipe, a conveying pipe A, a conveying pipe B, an exhaust pipe A, and an exhaust pipe B. One end of each of the conveying pipes A and B is connected to the discharge pipe. Valves are installed on both conveying pipes A and B. Each of the conveying pipes A and B is connected to two air ports on a pneumatic motor. Exhaust pipes A and B are respectively installed on the conveying pipes A and B, and valves are installed on both. The valves on both conveying pipes A and B are located on the side closest to the discharge pipe. When air is supplied to the air ports connected to conveying pipe A, exhaust pipes A and B are closed. The valve on delivery pipe B opens the air pump, allowing gas to enter the air hole connected to delivery pipe A through the discharge pipe and delivery pipe A. The gas then enters the pneumatic motor, and is discharged into delivery pipe B through another air hole, before finally exiting through exhaust pipe B. When supplying air to the air hole connected to delivery pipe B, the valves on exhaust pipe B and delivery pipe A are closed, allowing gas to enter the pneumatic motor through delivery pipe B and exit through exhaust pipe A on delivery pipe A. When gas enters through two different air holes on the pneumatic motor, the output axis can rotate in different directions.

[0008] Preferably, the sliding column is provided with a spline, and the connecting column is provided with a groove. The sliding column is installed in the groove of the connecting column by sliding up and down through the spline.

[0009] Preferably, the surface of the sliding column is provided with a wear-resistant coating; this provision reduces the wear of the sliding column.

[0010] Preferably, a filter screen is provided at the input end of the air intake pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are: when opening and closing the gate valve, the handwheel on the gate valve can be rotated automatically, which reduces labor intensity, is convenient to use, and has high practicality. Attached Figure Description

[0012] Figure 1 It is a structural diagram of the base plate, gate valve, and handwheel, etc.

[0013] Figure 2 It is a structural diagram of the handwheel, pneumatic motor, and output shaft, etc.

[0014] Figure 3 It is a structural schematic diagram of sliding columns, connecting columns, and pneumatic motors, etc.

[0015] Figure 4 This is a structural diagram of the air pump, delivery pipe A, and delivery pipe B, etc.

[0016] Figure 5 This is a structural diagram of the connecting column and the sliding column.

[0017] The following are labels in the attached diagram: 1. Base plate; 2. Gate valve; 3. Handwheel; 4. Sliding column; 5. Connecting column; 6. Pneumatic motor; 7. Lifting frame; 8. Air hole; 9. Output shaft; 10. Air pump; 11. Inlet pipe; 12. Outlet pipe; 13. Delivery pipe A; 14. Delivery pipe B; 15. Exhaust pipe A; 16. Exhaust pipe B. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0019] Example 1

[0020] like Figures 1 to 5The multi-turn valve pneumatic actuator of this utility model includes a base plate 1, a gate valve 2, a sliding column 4, a connecting column 5, and a drive mechanism. The gate valve 2 is installed on the upper end of the base plate 1, and a handwheel 3 is provided on the gate valve 2. The opening and closing of the gate valve 2 is controlled by rotating the handwheel 3. The sliding column 4 is fixedly installed on the upper end of the handwheel 3, and the upper part of the sliding column 4 is slidably installed on the connecting column 5. The connecting column 5 is installed on the drive mechanism, which is used to drive the connecting column 5 to rotate. The sliding column 4, the connecting column 5, and the handwheel 3 are coaxial. The drive mechanism is connected to an external controller. When controlling the opening and closing of the gate valve 2, the controller controls the drive mechanism to rotate the connecting column 5. The connecting column 5 rotates the handwheel 3 through the sliding column 4, and the opening and closing of the gate valve 2 is controlled by rotating the handwheel 3. When opening and closing the gate valve 2, it can automatically rotate the handwheel 3 on the gate valve 2, which reduces labor intensity, is convenient to use, and has high practicality.

[0021] like Figure 1 and Figure 3 The drive mechanism includes a pneumatic motor 6, a lifting frame 7, an output shaft 9, and an air supply mechanism. The pneumatic motor 6 is fixedly mounted on the lifting frame 7. The pneumatic motor 6 has two air holes 8. The output end of the pneumatic motor 6 is provided with an output shaft 9. A connecting column 5 is fixedly mounted on the lower end of the output shaft 9. The air supply mechanism communicates with the two air holes 8. The lifting frame 7 is fixedly mounted on an external support. When the connecting column 5 is rotated, air is supplied to one of the air holes 8 through the air supply mechanism. After the gas enters the pneumatic motor 6, it is discharged through the other air hole 8 on the pneumatic motor 6. At the same time, after entering the pneumatic motor 6, the gas drives the output shaft 9 to rotate through the impeller and other structures in the pneumatic motor 6, thereby causing the output shaft 9 to drive the connecting column 5 to rotate. When the air supply mechanism switches to supplying air to the other air hole 8, the output shaft 9 rotates in the opposite direction. The rotation direction of the output shaft 9 can be adjusted as needed, improving convenience.

[0022] like Figure 4 The air supply mechanism includes a conveying mechanism, an air pump 10, an air inlet pipe 11, and an air outlet pipe 12. The input end of the air pump 10 is connected to the air inlet pipe 11, and the output end of the air pump 10 is connected to the air outlet pipe 12. The air outlet pipe 12 is connected to two air holes 8 through the conveying mechanism. When the output shaft 9 on the pneumatic motor 6 is rotated, the air pump 10 is turned on, so that air enters the conveying mechanism in sequence through the air inlet pipe 11, the air pump 10, and the air outlet pipe 12. Then, the gas enters one of the air holes 8 through the conveying mechanism, and then the gas enters the pneumatic motor 6 through one of the air holes 8, thereby driving the output shaft 9 on the pneumatic motor 6 to rotate. Then, the gas is discharged through the other air hole 8 on the pneumatic motor 6.

[0023] like Figure 4The conveying mechanism includes a discharge pipe 12, a conveying pipe A13, a conveying pipe B14, an exhaust pipe A15, and an exhaust pipe B16. One end of each of the conveying pipes A13 and B14 is connected to the discharge pipe 12. Valves are installed on both conveying pipes A13 and B14. Each conveying pipe is connected to two air holes 8 on the pneumatic motor 6. Exhaust pipes A15 and B16 are installed on the conveying pipes A13 and B14, respectively, and are connected to both. Valves are installed on both exhaust pipes A15 and B16. The valves on the conveying pipes A13 and B14 are located on the side closest to the discharge pipe 12. When the discharge pipe A13 is filled with air, the valves on the conveying pipe B14 are connected to the discharge pipe 12. When air is supplied through the air port 8 connected to 13, the valves on the exhaust pipe A15 and the delivery pipe B14 are closed, and the air pump 10 is turned on, so that the gas enters the air port 8 connected to the delivery pipe A13 through the exhaust pipe 12 and the delivery pipe A13. Then the gas enters the pneumatic motor 6, and then the gas is discharged into the delivery pipe B14 through another air port 8. After that, the gas is discharged through the exhaust pipe B16. When air is supplied to the air port 8 connected to the delivery pipe B14, the valves on the exhaust pipe B16 and the delivery pipe A13 are closed, so that the gas enters the pneumatic motor 6 through the delivery pipe B14. The gas is discharged through the exhaust pipe A15 on the delivery pipe A13. When the gas enters through the two different air ports 8 on the pneumatic motor 6, the output shaft 9 can rotate in different directions.

[0024] The surface of the sliding column 4 is provided with a wear-resistant coating, and the sliding column 4 is provided with a spline. The connecting column 5 is provided with a groove. The sliding column 4 is installed in the groove of the connecting column 5 by sliding up and down through the spline.

[0025] Example 2

[0026] Based on Embodiment 1, a filter screen is provided at the input end of the air intake pipe 11.

[0027] The handwheel 3, pneumatic motor 6, lifting frame 7, and air pump 10 of the multi-turn valve pneumatic actuator of this utility model are all purchased from the market. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multi-turn valve pneumatic actuator, comprising a base plate (1) and a gate valve (2), wherein the gate valve (2) is mounted on the upper end of the base plate (1), and a handwheel (3) is provided on the gate valve (2), the opening and closing of the gate valve (2) is controlled by rotating the handwheel (3); characterized in that, It also includes a sliding column (4), a connecting column (5) and a drive mechanism. The sliding column (4) is fixedly installed on the upper end of the handwheel (3). The upper part of the sliding column (4) is slidably installed on the connecting column (5). The connecting column (5) is installed on the drive mechanism. The drive mechanism is used to drive the connecting column (5) to rotate. The sliding column (4), the connecting column (5) and the handwheel (3) are coaxial. The drive mechanism includes a pneumatic motor (6), a lifting frame (7), an output shaft (9), and an air supply mechanism. The pneumatic motor (6) is fixedly installed on the lifting frame (7). The pneumatic motor (6) has two air holes (8). The output end of the pneumatic motor (6) is provided with an output shaft (9). The connecting column (5) is fixedly installed at the lower end of the output shaft (9). The air supply mechanism is connected to the two air holes (8). The gas supply mechanism includes a conveying mechanism, a gas pump (10), an air inlet pipe (11), and an exhaust pipe (12). The input end of the gas pump (10) is connected to the air inlet pipe (11), and the output end of the gas pump (10) is connected to the exhaust pipe (12). The exhaust pipe (12) is connected to two air holes (8) through the conveying mechanism. The conveying mechanism includes a discharge pipe (12), a conveying pipe A (13), a conveying pipe B (14), an exhaust pipe A (15), and an exhaust pipe B (16). One end of the conveying pipe A (13) and the conveying pipe B (14) are connected to the discharge pipe (12). Valves are provided on the conveying pipe A (13) and the conveying pipe B (14). The conveying pipe A (13) and the conveying pipe B (14) are respectively connected to two air holes (8) on the pneumatic motor (6). The exhaust pipe A (15) and the exhaust pipe B (16) are respectively installed on the conveying pipe A (13) and the conveying pipe B (14). Valves are provided on the exhaust pipe A (15) and the exhaust pipe B (16).

2. The multi-turn valve pneumatic actuator as described in claim 1, characterized in that, The sliding column (4) is provided with a spline, and the connecting column (5) is provided with a groove. The sliding column (4) is installed in the groove of the connecting column (5) by sliding up and down through the spline.

3. The multi-turn valve pneumatic actuator as described in claim 1, characterized in that, The surface of the sliding column (4) is provided with a wear-resistant coating.

4. The multi-turn valve pneumatic actuator as described in claim 1, characterized in that, The intake pipe (11) is equipped with a filter screen at its input end.

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