Valve pneumatic actuating mechanism
By introducing a combination of rack rod, gear seat, limit bolt and adjustment ring into the pneumatic actuator, the problem of difficulty in operating the valve under power and air is solved, and the stable and precise control of high-pressure large-diameter valves is achieved.
Patent Information
- Application Number
- CN202421564106.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-04
AI Technical Summary
In the case of power and air disconnection, the pneumatic actuator is difficult to operate manually and cannot achieve precise control of the valve, especially high-pressure large-diameter valves.
A manual adjustment mechanism including rack rod, gear seat, connector, limit bolt and adjustment ring is designed. Through the combination of the hexagonal hole and limit bolt, the valve is stable and precisely controlled under power and air disconnection.
In the case of power and air disconnection, the valve opening and closing can be controlled stably and accurately, reducing the torque requirement for manual operation, and is suitable for high-pressure large-diameter valves.
Smart Images
Figure CN223137117U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, and particularly relates to a pneumatic actuator for valves. Background Art
[0002] A pneumatic actuator for valves is a device used to control the opening and closing of valves, and controls the valves from a remote position through pneumatic force. It usually consists of a pneumatic actuator, a valve, a connecting piece, a control element, an accessory, etc. The pneumatic actuator receives signals from the control system, and transmits the pneumatic force to the valve through the air source, so as to realize the opening or closing action. This mechanism is widely used in the industrial field, and can realize remote and automatic control, improving production efficiency and safety.
[0003] Since the pneumatic actuator relies on compressed air for driving, when the air source is interrupted or there is a power failure, the valve may not be able to open or close according to the predetermined instructions. In this case, the valve may remain in the current state and automatic control cannot be achieved. And in the case of power failure and air cut-off, due to the lack of a stable driving energy source, the reliability of the pneumatic actuator will be affected, and then it needs to be controlled through a manual structure.
[0004] In the state of power failure and air cut-off, the pneumatic actuator relies on manual operation. Since the gas pressure in the cylinder disappears, the operating torque increases, and a greater force is required for manual operation. For some high-pressure and large-diameter valves, manual operation may become difficult. At the same time, in the case of power failure and air cut-off, the manual operation of the pneumatic actuator is usually limited to the opening and closing of the valve, and precise control of the valve cannot be achieved.
[0005] Therefore, it is very necessary to invent a pneumatic actuator for valves to solve the above problems. Content of the Utility Model
[0006] The purpose of the utility model is to provide a pneumatic actuator for valves to solve the above deficiencies in the technology.
[0007] To achieve the above purpose, the utility model provides the following technical solution: A pneumatic actuator for valves, including a housing, a rack bar is vertically arranged at the center inside the housing, gear seats are installed at both ends inside the housing, the front ends of the two gear seats are respectively located on one side of the rack bar, and the front ends of the two gear seats are respectively meshed and connected with the outer sides of both sides of the rack bar;
[0008] A connection head is fixedly installed at the top of the rack bar, an internal hexagonal hole is opened at the top of the connection head, a base is fixedly installed at the bottom of the rack bar, a locking hole is opened at the bottom of the base, an adjusting ring is sleeved on the top of the rack bar, and limit bolts are horizontally threadedly installed on both sides of the housing above and corresponding to the adjusting ring.
[0009] As a preferred embodiment of the present utility model, the adjusting ring is fixedly connected to the top of the rack bar. The front surface of the adjusting ring has a triangular structure, and the back surface of the adjusting ring has an annular structure. The two limit bolts are respectively located on both sides of the triangular structure on the front surface of the adjusting ring.
[0010] As a preferred embodiment of the present utility model, end caps are fixedly installed at both ends of the housing through bolts. A plurality of combined springs are horizontally fixedly installed at the tails of the two gear seats, and the tails of the plurality of combined springs are connected to the end caps.
[0011] As a preferred embodiment of the present utility model, through holes are provided at the top and bottom of the housing, and the two through holes are on the same vertical center line. The top and bottom ends of the rack bar are respectively located in the through holes at the top and bottom of the housing.
[0012] As a preferred embodiment of the present utility model, a ball valve is provided at the bottom of the housing. A shaft rod is vertically fixedly installed at the top of the ball valve, and the top end of the shaft rod is connected to the locking hole at the bottom of the base.
[0013] As a preferred embodiment of the present utility model, a cap is installed on the top of the rack bar. A sleeve is fixedly installed at the center inside the cap, and the sleeve is threadedly connected to the top end of the rack bar.
[0014] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:
[0015] 1. By installing a connector at the top of the rack bar, providing an internal hexagonal hole at the top of the connector, installing two symmetrical limit bolts on one side above the housing, and installing an adjusting ring at the upper end of the rack bar, a manual adjustment mechanism composed of the adjusting ring, limit bolts, and connector is utilized. In the case of power failure and gas cut-off, the valve can be controlled to close through the manual structure. Moreover, this manual adjustment mechanism can not only stably control the opening and closing of the valve, but also achieve more precise adjustment and control. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.
[0017] Figure 1 It is a three-dimensional view of the overall structure of the present utility model;
[0018] Figure 2 It is an exploded view of the overall structure of the present utility model from the first perspective;
[0019] Figure 3 This is the second perspective exploded view of the overall structure of the present utility model;
[0020] Figure 4 This is the cross-sectional view of the overall structure of the present utility model;
[0021] Figure 5 This is the three-dimensional view of the rack bar of the present utility model.
[0022] Explanation of reference numerals:
[0023] 1. Housing; 2. End cover; 3. Gear seat; 4. Rack bar; 41. Connector; 42. Hexagon socket head cap screw hole; 43. Base; 5. Through hole; 6. Shaft rod; 7. Ball valve; 8. Adjusting ring; 9. Limit bolt; 10. Combination spring; 11. Cap; 12. Sleeve. Detailed implementation manners
[0024] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further introduced in detail below with reference to the accompanying drawings.
[0025] The present utility model provides a pneumatic actuator for a valve as Figures 1-5 shown, which includes a housing 1. The housing 1 serves as the overall framework of the actuator to ensure the stable installation and operation of each component. A rack bar 4 is vertically arranged at the center inside the housing 1. The rack bar 4 realizes the opening and closing actions of the valve through meshing connection with the gear seat 3. Gear seats 3 are installed at both ends inside the housing 1. The front ends of the two gear seats 3 are respectively located on one side of the rack bar 4, and the front ends of the two gear seats 3 are respectively meshed with the outer sides of both sides of the rack bar 4;
[0026] A connector 41 is fixedly installed at the top of the rack bar 4. A hexagon socket head cap screw hole 42 is opened at the top of the connector 41. A base 43 is fixedly installed at the bottom of the rack bar 4. A locking hole is opened at the bottom of the base 43. An adjusting ring 8 is sleeved on the top of the rack bar 4. The adjusting ring 8 realizes precision when manually controlling the valve and adjusts the opening degree of the valve. Limit bolts 9 are horizontally threadedly installed on both sides at the position corresponding to the adjusting ring 8 on one side above the housing 1. The limit bolts 9 limit the moving range of the adjusting ring 8 to ensure the opening and closing positions of the valve.
[0027] Furthermore, in the above technical solution, the adjusting ring 8 is fixedly connected to the top of the rack bar 4. The front surface of the adjusting ring 8 is triangular in structure, and the back surface of the adjusting ring 8 is annular in structure. The two limit bolts 9 are respectively on both sides of the triangular structure on the front surface of the adjusting ring 8.
[0028] Further, in the above technical solution, end caps 2 are fixedly installed at both ends of the housing 1 through bolts. The end caps 2 protect the internal components and enhance the sealing performance of the actuator. At the tails of both gear seats 3, a plurality of combined springs 10 are horizontally fixedly installed. The tails of the plurality of combined springs 10 are connected to the end caps 2. The combined springs 10 provide an additional operating force in the case of power failure and air cut-off, enabling the valve to be manually operated.
[0029] Further, in the above technical solution, through holes 5 are provided at both the top and bottom of the housing 1. The two through holes 5 are on the same vertical center line. The top and bottom ends of the rack bar 4 are respectively located in the through holes 5 at the top and bottom of the housing 1.
[0030] Further, in the above technical solution, a ball valve 7 is provided at the bottom of the housing 1. A shaft rod 6 is vertically fixedly installed at the top of the ball valve 7. The top end of the shaft rod 6 is connected to the locking hole at the bottom of the base 43.
[0031] Further, in the above technical solution, a cap 11 is installed to cover the top of the rack bar 4. The cap 11 protects the top of the rack bar 4 and enhances the sealing performance of the actuator. A sleeve 12 is fixedly installed at the center inside the cap 11. The sleeve 12 is threadedly connected to the top end of the rack bar 4.
[0032] When the pneumatic actuator of the valve provided by the present utility model is in use, its working process is as follows:
[0033] When the pneumatic actuator of the valve needs to be manually controlled and adjusted in the case of power failure and air cut-off, rotate the cap 11 off the connector 41. Then, insert a special hex key into the hex hole 42 at the top of the connector 41, and then turn the wrench to rotate the rack bar 4 through the wrench. When the rack bar 4 rotates forward or backward, the rack bar 4 drives the two gear seats 3 to move relatively or in opposite directions. As the rack bar 4 rotates forward and backward, the ball valve 7 follows the shaft rod 6 to open and close at the bottom of the rack bar 4. When the rack bar 4 drives the ball valve 7 to rotate to an appropriate angle, turn the two limit bolts 9 above the outside of the housing 1. Then, the front ends of the two limit bolts 9 move towards the inside of the housing 1. When the front ends of the two limit bolts 9 abut against both sides of the adjusting ring 8 above the rack bar 4, stop turning the limit bolts 9. The two limit bolts 9 prevent the adjusting ring 8 from rotating. Since the adjusting ring 8 is fixed above the rack bar 4, the purpose of preventing the rack bar 4 from rotating is achieved, avoiding the situation where the ball valve 7 rotates and closes inside the valve. When the valve is re-energized and re-aerated, the two limit bolts 9 need to be turned again and retracted to their original positions to prevent the front ends of the two limit bolts 9 from contacting the adjusting ring 8 and affecting the automatic controlled rotation of the rack bar 4.
[0034] Only some exemplary embodiments of the present utility model are described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.
Claims
1. A pneumatic actuator for a valve, comprising a housing (1), characterized in that: A rack bar (4) is vertically arranged at the inner center of the housing (1). Gear seats (3) are installed at both ends inside the housing (1). The front ends of the two gear seats (3) are respectively located on one side of the rack bar (4), and the front ends of the two gear seats (3) are respectively meshed and connected with the outer sides of both sides of the rack bar (4). A connection head (41) is fixedly installed at the top of the rack bar (4). An internal hexagonal hole (42) is formed at the top of the connection head (41). A base (43) is fixedly installed at the bottom of the rack bar (4). A locking hole is formed at the bottom of the base (43). An adjusting ring (8) is sleeved on the top of the rack bar (4). Two limit bolts (9) are horizontally and threadedly installed on both sides of the upper side of the housing (1) at a position corresponding to the adjusting ring (8).
2. The pneumatic actuator of a valve according to claim 1, characterized in that: The adjusting ring (8) is fixedly connected with the top of the rack bar (4). The front surface of the adjusting ring (8) is of a triangular structure, and the back surface of the adjusting ring (8) is of an annular structure. The two limit bolts (9) are respectively located on both sides of the triangular structure on the front surface of the adjusting ring (8).
3. The pneumatic actuator of a valve according to claim 1, characterized in that: End covers (2) are fixedly installed at both ends of the housing (1) through bolts. A plurality of combined springs (10) are horizontally and fixedly installed at the tail ends of the two gear seats (3). The tail ends of the plurality of combined springs (10) are connected with the end covers (2).
4. A pneumatic actuator for a valve according to claim 1, characterized in that: Through holes (5) are formed at the top and bottom of the housing (1). The two through holes (5) are on the same vertical center line. The top end and the bottom end of the rack bar (4) are respectively located in the through holes (5) at the top and bottom of the housing (1).
5. A pneumatic actuator for a valve according to claim 1, characterized in that: A ball valve (7) is arranged at the bottom of the housing (1). A shaft rod (6) is vertically and fixedly installed at the top of the ball valve (7). The top end of the shaft rod (6) is connected with the locking hole at the bottom of the base (43).
6. The pneumatic actuator of a valve according to claim 1, characterized in that: A cap (11) is coveredly installed at the top of the rack bar (4). A sleeve (12) is fixedly installed at the inner center of the cap (11). The sleeve (12) is threadedly connected with the top end of the rack bar (4).