CN221922212U - Pneumatic actuating mechanism of valve - Google Patents
Pneumatic actuating mechanism of valve Download PDFInfo
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- CN221922212U CN221922212U CN202420648550.3U CN202420648550U CN221922212U CN 221922212 U CN221922212 U CN 221922212U CN 202420648550 U CN202420648550 U CN 202420648550U CN 221922212 U CN221922212 U CN 221922212U
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- buffer
- piston
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- 230000007246 mechanism Effects 0.000 title claims abstract description 18
- 230000001360 synchronised effect Effects 0.000 claims abstract description 4
- 230000000712 assembly Effects 0.000 abstract description 6
- 238000000429 assembly Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Abstract
The utility model discloses a pneumatic actuating mechanism of a valve, which relates to the technical field of valve actuating mechanisms and comprises a shell, wherein spring cylinders and driving cylinders are respectively arranged at two ends of the shell, pistons in the two cylinders are connected through a connecting rod to realize synchronous sliding, a fixed rotating shaft is arranged on the connecting rod, the shell is provided with a shifting fork shaft, a shifting fork is hinged on the shifting fork shaft, the shifting fork is provided with a sliding chute, the fixed rotating shaft is limited in the sliding chute, a spring frame is arranged in the spring cylinder to divide the spring cylinder into an upper spring cylinder and a lower spring cylinder, a first spring component is arranged in the upper spring cylinder, a second spring component is arranged in the lower spring cylinder, and the elastic modulus of the first spring component is smaller than or equal to that of the second spring component. The spring assemblies are not easy to damage due to frequent operation, and when any one group of spring assemblies fails, the other group of spring assemblies can still play a role, so that the operation stability of the actuating mechanism is ensured, and the opening and closing of the valve are ensured to be normal.
Description
Technical Field
The utility model relates to the technical field of valve execution mechanisms, in particular to a valve pneumatic execution mechanism.
Background
Valve actuating mechanisms are generally classified into pneumatic, electric and hydraulic actuating mechanisms according to energy forms, wherein the pneumatic actuating mechanism is an actuating device for opening and closing or adjusting a valve by using air pressure, and is also called a pneumatic actuator or a pneumatic device. The shifting fork type pneumatic actuator is a type of stroke piston actuating mechanism, is suitable for switching off or metering control of valves (such as ball valves, butterfly valves and plug valves) with 90-degree rotation angles, and is used for pushing pistons to do linear motion through compressed air entering cylinders, and the piston pin and shifting fork U-shaped groove design is utilized to convert the linear motion of the pistons into the rotary motion of shifting forks, and the shifting forks rotate to drive output shafts to rotate, so that the control of the valves is realized.
The existing single-acting shifting fork type pneumatic actuator is driven by an air source to complete the opening action, the closing action is completed by spring reset, a driving cylinder and a spring cylinder are usually arranged in the spring cylinder, and a reset spring is arranged in the spring cylinder.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a valve pneumatic actuating mechanism.
The technical scheme provided by the utility model is as follows:
The utility model provides a pneumatic actuating mechanism of valve, includes the casing, the casing both ends are equipped with spring jar and actuating cylinder respectively, be equipped with the reset piston in the spring jar, be equipped with the actuating piston in the actuating cylinder, the actuating piston passes through the connecting rod with the reset piston and links to each other and realize synchronous slip, be equipped with fixed pivot on the connecting rod, the casing is equipped with the shift fork axle, articulated shift fork on the shift fork axle, the shift fork is equipped with the spout, fixed pivot is spacing in the spout, be equipped with the spring frame in the spring jar, the spring frame separates the spring jar into spring jar and lower spring jar, be equipped with first spring subassembly in the spring jar, the cylinder cap of spring jar is supported to first spring subassembly one end, the other end supports the spring frame, be equipped with the second spring subassembly in the lower spring jar, second spring subassembly one end supports the spring frame, the other end supports the reset piston, the modulus of elasticity of first spring subassembly is less than or equal to the modulus of elasticity of second spring subassembly.
The first spring assembly comprises a first spring and a second spring, the diameter of the first spring is larger than that of the second spring, and the first spring is sleeved outside the second spring.
The second spring assembly comprises a third spring and a fourth spring, the diameter of the third spring is larger than that of the fourth spring, and the third spring is sleeved outside the fourth spring.
The spring frame is provided with a plurality of mounting grooves which are matched with springs with different diameters.
The driving cylinder is provided with a buffer cylinder, a buffer rod is arranged in the buffer cylinder, one end of the buffer rod extends into the driving cylinder and is connected with the driving piston, and the other end of the buffer rod is provided with a soft buffer column.
The buffer cylinder is detachably connected to a cylinder cover of the driving cylinder through the stud, a through hole is formed in the cylinder cover of the driving cylinder, threads are arranged in the through hole, and external threads are arranged on the buffer rod corresponding to the through hole.
And air holes are formed in the two ends of the driving cylinder, and air holes are formed in the side, far away from the shell, of the spring cylinder.
The bottom of the fixed rotating shaft is provided with a limiting column, and the top of the limiting column is in a cambered surface shape and is contacted with the outer wall of the fixed rotating shaft.
The utility model has the beneficial effects that: according to the utility model, the spring frame is arranged in the spring cylinder, the spring frame separates the spring cylinder into the upper spring cylinder and the lower spring cylinder, the upper spring cylinder and the lower spring cylinder are respectively provided with the spring components, and the elastic modulus of the spring components in the upper spring cylinder is smaller than or equal to that of the spring components in the lower spring cylinder, so that the deformation of the spring components in the upper spring cylinder is larger than that of the spring components in the lower spring cylinder when the reset piston presses the spring components under the force, the spring components in the upper spring cylinder play a buffering role, the spring components are not easy to damage due to frequent operation, and when any group of spring components fail, the other group of spring components still play a role, the operation stability of an executing mechanism is ensured, and the opening and closing of the valve is ensured to be normal.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
fig. 2 is a schematic cross-sectional structure of an embodiment of the present utility model.
Detailed Description
Embodiments of the present utility model are further described below with reference to the accompanying drawings.
As shown in fig. 1-2, a valve pneumatic actuator comprises a housing 1, wherein spring cylinders 2 and driving cylinders 3 are respectively arranged at two ends of the housing 1.
The casing 1 is equipped with shift rail 9, connecting rod 11, and shift rail 9 extends outside casing 1 for be connected with the valve rod of valve, articulated shift fork 23 on the shift rail 9, shift fork 23 are equipped with spout 231, and connecting rod 11 both ends extend respectively to in spring jar 2 and the actuating cylinder 3, are equipped with fixed pivot 10 on the connecting rod 11, and fixed pivot 10 is spacing in spout 231, and fixed pivot 10 bottom is equipped with spacing post 24, and spacing post 24 top is arc shape, contacts with fixed pivot 10 outer wall, ensures that the transmission is stable.
The spring cylinder 2 comprises a cylinder body and a cylinder cover 17 which are detachably connected through bolts, the disassembly, the maintenance and the maintenance are convenient, the cylinder cover 17 is provided with an exhaust hole 16, a reset piston 12 is arranged in the spring cylinder 2, the reset piston 12 is connected with one end of a connecting rod 11, a spring frame 4 is arranged between the reset piston 12 and the cylinder cover 17, the spring cylinder is divided into an upper spring cylinder 21 and a lower spring cylinder 22 by the spring frame 4, a first spring assembly is arranged in the upper spring cylinder 21 and comprises a first spring 6 and a second spring 5, the diameter of the first spring 6 is larger than that of the second spring 5, the first spring 6 is sleeved outside the second spring 5, one end of the first spring assembly is propped against the cylinder cover 17, the other end of the first spring assembly is propped against the spring frame 4, and an installation groove 41 matched with the first spring 6 and the second spring 5 is arranged on the spring frame 4 to prevent the spring from shifting when the spring is extruded; the lower spring cylinder 22 is internally provided with a second spring assembly, the second spring assembly comprises a third spring 8 and a fourth spring 9, the diameter of the third spring 8 is larger than that of the fourth spring 9, the third spring 8 is sleeved outside the fourth spring 9, one end of the second spring assembly is propped against the spring frame 4, the other end is propped against the reset piston 12, the double-spring structure can better support and disperse pressure when being compressed, the service life is longer under the condition of frequent action, and furthermore, the elastic modulus of the first spring assembly is smaller than or equal to that of the second spring assembly, so that the deformation of the first spring assembly in the upper spring cylinder is larger than that of the second spring assembly in the lower spring cylinder when the reset piston 12 is stressed to squeeze the spring assemblies, the first spring assembly in the upper spring cylinder plays a role in buffering, and when any group of spring assemblies fails, the other group of spring assemblies still play a role, the operation of the actuating mechanism is stable, and the normal opening and closing of the valve is ensured.
The driving cylinder 3 comprises a cylinder body and a cylinder cover which are detachably connected through bolts, the disassembly, the maintenance and the maintenance are convenient, the cylinder covers at the two ends of the driving cylinder are respectively provided with an air inlet hole 15 and an air outlet hole 20, the air inlet hole 15 is used for being connected with an air source to provide driving force, the driving cylinder 3 is internally provided with a driving piston 13, the driving piston 13 and a reset piston 12 are connected through a connecting rod 11 to realize synchronous sliding, the driving cylinder is externally provided with a buffer cylinder 14, a buffer rod 18 is arranged in the buffer cylinder 14, one end of the buffer rod 18 extends into the driving cylinder 14 to be connected with the driving piston 13, the other end of the buffer rod is provided with a soft buffer column 19, the soft buffer column 19 is contacted with the cylinder body of the buffer cylinder 14, sliding friction force between the soft buffer column 19 and the cylinder body of the buffer cylinder 14 is used for providing buffering when an actuating mechanism acts, further, the action of the soft buffer column 19 in the buffer cylinder 14 is set to be smaller than the action of the driving piston 13 in the driving cylinder 3, and the soft buffer column 19 is firstly contacted with the end of the buffer cylinder 14, so that the soft buffer column 13 can not strike the cylinder cover of the driving cylinder 3 due to overlarge rebound force of the reset spring. Preferably, the buffer cylinder 14 is detachably connected to the cylinder cover of the driving cylinder 13 through a stud, a through hole 25 is formed in the cylinder cover of the driving cylinder, threads are arranged in the through hole 25, and the buffer rod 18 is provided with external threads corresponding to the through hole, so that the buffer rod is convenient to detach, maintain and repair.
The operation process of the pneumatic actuating mechanism of the valve is as follows:
When the opening action is required to be executed, the air source is used for air filling into the air inlet hole 15, the air pressure drives the driving piston 13 to move left, the connecting rod 11 to move left, the soft buffer column 19 slides to the left in the buffer cylinder 14 to provide buffer, so that the fixed rotating shaft 10 is driven to move left, the shifting fork 23 is driven to swing left due to the limit of the sliding groove 231, the shifting fork shaft 9 is driven to rotate, the opening of the valve is realized, and the reset piston 12 moves left to squeeze the spring component due to the left movement of the connecting rod 11;
When the closing action is required to be executed, the compression resilience force of the spring assembly drives the reset piston 12 to move right, the connecting rod 11 is driven to move right, the fixed rotating shaft 10 is driven to move right, the shifting fork 23 is driven to swing right due to the limit of the sliding groove 231, the shifting fork shaft 9 is driven to rotate, the valve is closed, the driving piston 13 is driven to move right due to the right movement of the connecting rod 11, the soft buffer column 19 slides right in the buffer cylinder 14 to provide buffering, the soft buffer column 19 firstly contacts the right end part of the buffer cylinder 14, and the driving piston 13 is ensured not to collide with the cylinder cover of the driving cylinder 3 due to the overlarge resilience force of the reset spring.
The examples should not be construed as limiting the utility model, and any non-inventive modifications based on the spirit of the utility model should be regarded as being within the scope of the utility model.
Claims (8)
1. The utility model provides a pneumatic actuating mechanism of valve, includes the casing, the casing both ends are equipped with spring jar and actuating cylinder respectively, be equipped with the piston that resets in the spring jar, be equipped with the actuating piston in the actuating cylinder, the actuating piston passes through the connecting rod with the piston that resets and links to each other and realize synchronous slip, be equipped with fixed pivot on the connecting rod, the casing is equipped with the shift fork axle, articulated shift fork on the shift fork axle, the shift fork is equipped with the spout, fixed pivot is spacing in the spout, its characterized in that: the spring cylinder is internally provided with a spring frame, the spring frame divides the spring cylinder into an upper spring cylinder and a lower spring cylinder, a first spring assembly is arranged in the upper spring cylinder, one end of the first spring assembly is propped against a cylinder cover of the spring cylinder, the other end of the first spring assembly is propped against the spring frame, a second spring assembly is arranged in the lower spring cylinder, one end of the second spring assembly is propped against the spring frame, the other end of the second spring assembly is propped against a reset piston, and the elastic modulus of the first spring assembly is smaller than or equal to that of the second spring assembly.
2. A valve pneumatic actuator as set forth in claim 1 wherein: the first spring assembly comprises a first spring and a second spring, the diameter of the first spring is larger than that of the second spring, and the first spring is sleeved outside the second spring.
3. A valve pneumatic actuator as set forth in claim 1 wherein: the second spring assembly comprises a third spring and a fourth spring, the diameter of the third spring is larger than that of the fourth spring, and the third spring is sleeved outside the fourth spring.
4. A valve pneumatic actuator as set forth in claim 1 wherein: the spring frame is provided with a plurality of mounting grooves which are matched with springs with different diameters.
5. A valve pneumatic actuator as set forth in claim 1 wherein: the driving cylinder is provided with a buffer cylinder, a buffer rod is arranged in the buffer cylinder, one end of the buffer rod extends into the driving cylinder and is connected with the driving piston, and the other end of the buffer rod is provided with a soft buffer column.
6. A valve pneumatic actuator as set forth in claim 5 wherein: the buffer cylinder is detachably connected to a cylinder cover of the driving cylinder through the stud, a through hole is formed in the cylinder cover of the driving cylinder, threads are arranged in the through hole, and external threads are arranged on the buffer rod corresponding to the through hole.
7. A valve pneumatic actuator as set forth in claim 1 wherein: and air holes are formed in the two ends of the driving cylinder, and air holes are formed in the side, far away from the shell, of the spring cylinder.
8. A valve pneumatic actuator as set forth in claim 1 wherein: the bottom of the fixed rotating shaft is provided with a limiting column, and the top of the limiting column is in a cambered surface shape and is contacted with the outer wall of the fixed rotating shaft.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202420648550.3U CN221922212U (en) | 2024-04-01 | 2024-04-01 | Pneumatic actuating mechanism of valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202420648550.3U CN221922212U (en) | 2024-04-01 | 2024-04-01 | Pneumatic actuating mechanism of valve |
Publications (1)
Publication Number | Publication Date |
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CN221922212U true CN221922212U (en) | 2024-10-29 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN202420648550.3U Active CN221922212U (en) | 2024-04-01 | 2024-04-01 | Pneumatic actuating mechanism of valve |
Country Status (1)
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CN (1) | CN221922212U (en) |
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2024
- 2024-04-01 CN CN202420648550.3U patent/CN221922212U/en active Active
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