Pneumatic single-seat quick response regulating valve

Abstract

The utility model discloses a pneumatic single-seat quick response regulating valve which comprises a pneumatic diaphragm actuating mechanism and a support arranged at the bottom of the pneumatic diaphragm actuating mechanism, a mounting frame is arranged at the bottom of a fixed outer frame, the mounting frame is arranged at the bottom end of a valve rod, and sliding rods are arranged on the two sides of the bottom end of the valve rod respectively. Sliding blocks are arranged on the sliding rods correspondingly, upward moving buffer springs are arranged on the sides, away from the valve rod, of the sliding blocks, rotating pieces are arranged on the sliding blocks, a pressing plate is arranged on the valve rod, rotating pieces are arranged on the two sides of the bottom of the pressing plate correspondingly, and linkage rods are arranged between the rotating pieces on the same side correspondingly. According to the pneumatic single-seat regulating valve, impact energy is dispersed through the vertical buffer spring and the upward-moving buffer spring, the multi-stage buffer effect is achieved, transverse shaking of the valve rod can be effectively restrained, and the stability and accuracy of operation of the valve element are remarkably improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of single-seat regulating valves, specifically relating to a pneumatic single-seat fast-response regulating valve. Background Technology

[0002] The pneumatic single-seat fast-response control valve is a type of valve that uses compressed air as a power source to drive the valve core to move rapidly through an actuator, thereby achieving precise control of process parameters such as fluid flow, pressure, or temperature. Its core feature is the single-seat structure design, meaning that there is only one valve seat and valve core in the valve body. It has good sealing performance and is suitable for applications requiring tight closure. Its rapid response capability is due to the optimized pneumatic actuator and lightweight valve core design, which can quickly follow changes in control signals and dynamically adjust fluid parameters. It meets the high real-time control requirements of industrial automation systems and is widely used in fast process control loops in industries such as petroleum, chemical, and power.

[0003] However, existing pneumatic single-seat control valves are prone to vibration during operation due to their excessively long valve stems. This can lead to incomplete valve closure and the opening and closing of the valve core can cause significant impacts on the valve stem and valve core, affecting the stability of the valve core. Utility Model Content

[0004] The purpose of this utility model is to provide a pneumatic single-seat fast-response regulating valve to solve the problems mentioned in the background art. In the operation of the existing pneumatic single-seat regulating valve, due to its excessively long valve stem, the valve stem is prone to vibration during movement, which leads to incomplete valve core closure. At the same time, the opening and closing of the valve core may cause a large impact on the valve stem and valve core, affecting the stability of the valve core.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic single-seat fast-response regulating valve, including a pneumatic diaphragm actuator and a bracket disposed at the bottom of the pneumatic diaphragm actuator;

[0006] An actuator positioner is provided on the side of the bracket, a pneumatic conduit is provided between the actuator positioner and the pneumatic diaphragm actuator, a valve stem is provided in the middle of the bracket, a packing gland is provided at the bottom of the bracket, a top cover is provided below the bracket, and a valve body is provided below the top cover.

[0007] A fixed outer frame is provided at the top of the valve body and inside the top cover. A mounting frame is provided at the bottom of the fixed outer frame. The mounting frame is located at the bottom end of the valve stem. Sliding rods are provided on both sides of the bottom end of the valve stem. Sliding blocks are provided on the sliding rods. An upward buffer spring is provided on the side of the sliding block away from the valve stem. A downward buffer spring is provided on the side of the sliding block closer to the valve stem. A rotating component is provided on the sliding block. A pressure plate is provided on the valve stem. Rotating components are also provided on both sides of the bottom of the pressure plate. A connecting rod is provided between the rotating components on the same side. A vertical buffer spring is provided at the top of the pressure plate. A valve core is provided at the bottom of the mounting frame.

[0008] Preferably, the fixed outer frame is fixedly installed with the valve body, the mounting frame is movably connected with the fixed outer frame, and the mounting frame can move up and down within the fixed outer frame.

[0009] Preferably, the slide rod is welded to the mounting frame and the valve stem respectively, the upper and lower buffer springs are respectively sleeved on the slide rod, the slide rod is inserted into the sliding block, and the sliding block can slide on the slide rod.

[0010] Preferably, the rotating component is welded to the sliding block, the rotating component is welded to the pressure plate, the connecting rod is rotatably connected to the rotating component, and the connecting rod can push and pull the sliding block.

[0011] Preferably, the pressure plate is welded to the valve stem, the vertical buffer spring is sleeved on the valve stem, and the pressure plate can compress the vertical buffer spring.

[0012] Preferably, the valve stem passes through the fixed outer frame and the top cover, the valve core is welded to the mounting frame, and the valve core can move up and down with the mounting frame.

[0013] Preferably, a sealing gasket is provided at the bottom of the valve core, and a sealing ring is provided at the valve body connection point, wherein the sealing gasket on the valve core can form a seal with the sealing ring.

[0014] Compared with the prior art, this utility model provides a pneumatic single-seat fast-response regulating valve, which has the following beneficial effects:

[0015] 1. By setting up a fixed outer frame, mounting frame, sliding block, sliding rod, upward buffer spring, downward buffer spring, connecting rod, rotating part, pressure plate, and vertical buffer spring, when the valve is opened, the actuator drives the valve stem to move upward. At this time, the vertical impact on the valve core is first absorbed by the vertical buffer spring. When the vertical buffer reaches its limit, the connecting rod will push the sliding blocks on both sides to move laterally, and further disperse the impact energy through the upward buffer spring. This not only achieves a multi-stage buffering effect, but also effectively suppresses the lateral sway of the valve stem, significantly improving the stability and accuracy of the valve core operation. At the same time, the downward buffer spring ensures the smooth reset of the buffer components, avoiding rigid collisions between components, thereby greatly extending the service life of key components such as the valve stem.

[0016] 2. By setting up sealing gaskets and sealing rings, this regulating valve adopts a replaceable sealing gasket and sealing ring combination structure. This dual sealing design not only effectively improves the overall sealing performance of the valve body and prevents the valve core from being eroded by the medium for a long time, but also makes the sealing components easy to maintain and replace, greatly extending the service life of the valve core assembly and reducing maintenance costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 For the present utility model Figure 1 Schematic diagram of a partial structure.

[0019] In the diagram: 1. Pneumatic diaphragm actuator; 2. Pneumatic conduit; 3. Actuator positioner; 4. Bracket; 5. Valve stem; 6. Packing gland; 7. Top cover; 8. Valve core; 9. Valve body; 10. Sealing ring; 11. Sealing gasket; 12. Linkage rod; 13. Upward buffer spring; 14. Downward buffer spring; 15. Mounting frame; 16. Sliding block; 17. Slide rod; 18. Fixed outer frame; 19. Pressure plate; 20. Vertical buffer spring; 21. Rotating component. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides, for example Figure 1-2 The pneumatic single-seat fast-response regulating valve shown includes a pneumatic diaphragm actuator 1 and a bracket 4 disposed at the bottom of the pneumatic diaphragm actuator 1;

[0022] An actuator positioner 3 is provided on the side of the bracket 4. A pneumatic conduit 2 is provided between the actuator positioner 3 and the pneumatic diaphragm actuator 1. A valve stem 5 is provided in the middle of the bracket 4. A packing gland 6 is provided at the bottom of the bracket 4. A top cover 7 is provided below the bracket 4. A valve body 9 is provided below the top cover 7.

[0023] A fixed outer frame 18 is provided on the top of the valve body 9 and inside the top cover 7. A mounting frame 15 is provided at the bottom of the fixed outer frame 18. The mounting frame 15 is located at the bottom end of the valve stem 5. Slide rods 17 are provided on both sides of the bottom end of the valve stem 5. Slide blocks 16 are provided on the slide rods 17. An upward buffer spring 13 is provided on the side of the slide block 16 away from the valve stem 5. A downward buffer spring 14 is provided on the side of the slide block 16 close to the valve stem 5. A rotating part 21 is provided on the slide block 16. A pressure plate 19 is provided on the valve stem 5. Rotating parts 21 are also provided on both sides of the bottom of the pressure plate 19. A connecting rod 12 is provided between the rotating parts 21 on the same side. A vertical buffer spring 20 is provided on the top of the pressure plate 19. A valve core 8 is provided at the bottom of the mounting frame 15.

[0024] In this embodiment, the pneumatic single-seat fast-response regulating valve is a valve that uses compressed air as a power source and drives the valve core to move rapidly through the actuator to achieve precise control of process parameters such as fluid flow, pressure, or temperature. The working process of the pneumatic single-seat fast-response regulating valve is as follows: When the control system sends a regulating signal, the actuator positioner 3 converts the electrical signal into a pneumatic pressure signal, which drives the diaphragm in the pneumatic diaphragm actuator 1 to move, thereby causing the valve stem 5 and valve core 8 to move up and down in the valve body 9. The displacement of the valve core 8 changes the cross-sectional area through which the fluid passes, thereby achieving precise control of parameters such as flow and pressure. Its fast response characteristics benefit from the lightweight design of the valve core 5, the low-friction guide structure, and the high-sensitivity actuator positioner 3, ensuring that the regulating valve can quickly follow the changes in the control signal and adapt to rapid fluctuations in the operating conditions.

[0025] like Figure 1 and Figure 2 As shown, the fixed outer frame 18 is fixedly installed with the valve body 9, and the mounting frame 15 is movably connected to the fixed outer frame 18. The mounting frame 15 can move up and down within the fixed outer frame 18. The slide rod 17 is welded to the mounting frame 15 and the valve stem 5 respectively. The upward buffer spring 13 and the downward buffer spring 14 are respectively sleeved with the slide rod 17. The slide rod 17 is inserted into the sliding block 16. The sliding block 16 can slide on the slide rod 17. The rotating part 21 is welded to the sliding block 16 and the rotating part 21 is welded to the pressure plate 19. The connecting rod 12 is rotatably connected to the rotating part 21. The connecting rod 12 can push and pull the sliding block 16. The pressure plate 19 is welded to the valve stem 5. The vertical buffer spring 20 is sleeved with the valve stem 5. The pressure plate 19 can compress the vertical buffer spring 20.

[0026] Preferably, by fixing the outer frame 18, mounting frame 15, sliding block 16, sliding rod 17, upward buffer spring 13, downward buffer spring 14, connecting rod 12, rotating component 21, pressure plate 19, and vertical buffer spring 20, when the pneumatic single-seat regulating valve is opened, the actuator positioner 3 converts the electrical signal into a pneumatic pressure signal, driving the diaphragm in the pneumatic diaphragm actuator 1 to move, which can drive the valve stem 5 to move upward. At this time, the instantaneous pressure difference when the valve opens will have a certain impact on the valve core 8 and valve stem 5. When the valve core 8 moves upward, it will push the top mounting frame 15 to move upward, and then the upward movement of the pressure plate 19 will compress the vertical buffer spring 20. The vertical buffer spring 20 provides some buffering against the vertical impact on the valve core 8. When the vertical buffer spring 20 is compressed to its minimum, the pressure plate 19 will continue to push the sliding blocks 16 on both sides to move to both sides through the linkage rod 12, thereby further compressing the upward buffer spring 13. The upward buffer spring 13 can further provide buffering for the valve stem 5, and at the same time stabilize the left and right swaying of the valve stem 5 during the movement, thereby improving the stability of the valve core 8. The main function of the downward buffer spring 14 is to buffer the reset of the upward buffer spring 13 and the sliding block 16, prevent the sliding block 16 from directly colliding with the valve stem 5, and improve the service life of the valve stem 5.

[0027] like Figure 1 As shown, the valve stem 5 passes through the fixed outer frame 18 and the top cover 7, the valve core 8 is welded to the mounting frame 15, the valve core 8 can move up and down with the mounting frame 15, a sealing gasket 11 is provided at the bottom of the valve core 8, and a sealing ring 10 is provided at the connection of the valve body 9, the sealing gasket 11 on the valve core 8 can form a seal with the sealing ring 10.

[0028] Preferably, by setting the sealing gasket 11 and the sealing ring 10, the cooperation between the sealing gasket 11 and the sealing ring 10 can improve the sealing performance of the valve body 9 and prevent the valve core 8 of the valve body 9 from becoming unsealed after long-term flushing. At the same time, the sealing ring 10 and the sealing gasket 11 are replaceable parts, which can improve the service life of the valve core 8 in the valve body 9.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pneumatic single-seat fast-response regulating valve, comprising a pneumatic diaphragm actuator (1) and a bracket (4) disposed at the bottom of the pneumatic diaphragm actuator (1); An actuator positioner (3) is provided on the side of the bracket (4), a pneumatic conduit (2) is provided between the actuator positioner (3) and the pneumatic diaphragm actuator (1), a valve stem (5) is provided in the middle of the bracket (4), a packing gland (6) is provided at the bottom of the bracket (4), a top cover (7) is provided below the bracket (4), and a valve body (9) is provided below the top cover (7). Its features are: A fixed outer frame (18) is provided on the top of the valve body (9) and inside the top cover (7). A mounting frame (15) is provided at the bottom of the fixed outer frame (18). The mounting frame (15) is located at the bottom end of the valve stem (5). A sliding rod (17) is provided on both sides of the bottom end of the valve stem (5). A sliding block (16) is provided on each sliding rod (17). An upward buffer spring (13) is provided on the side of the sliding block (16) away from the valve stem (5). A downward buffer spring (14) is provided on the side of the sliding block (16) close to the valve stem (5). A rotating part (21) is provided on the sliding block (16). A pressure plate (19) is provided on the valve stem (5). A rotating part (21) is also provided on both sides of the bottom of the pressure plate (19). A connecting rod (12) is provided between the rotating parts (21) on the same side. A vertical buffer spring (20) is provided on the top of the pressure plate (19). A valve core (8) is provided at the bottom of the mounting frame (15).

2. The pneumatic single-seat fast-response regulating valve according to claim 1, characterized in that: The fixed outer frame (18) is fixedly installed with the valve body (9), and the mounting frame (15) is movably connected with the fixed outer frame (18). The mounting frame (15) can move up and down within the fixed outer frame (18).

3. A pneumatic single-seat fast-response regulating valve according to claim 2, characterized in that: The slide rod (17) is welded to the mounting frame (15) and the valve stem (5) respectively. The upward buffer spring (13) and the downward buffer spring (14) are respectively sleeved on the slide rod (17). The slide rod (17) is inserted into the sliding block (16). The sliding block (16) can slide on the slide rod (17).

4. A pneumatic single-seat fast-response regulating valve according to claim 3, characterized in that: The rotating part (21) is welded to the sliding block (16), the rotating part (21) is welded to the pressure plate (19), the connecting rod (12) is rotatably connected to the rotating part (21), and the connecting rod (12) can push and pull the sliding block (16).

5. A pneumatic single-seat fast-response regulating valve according to claim 4, characterized in that: The pressure plate (19) is welded to the valve stem (5), the vertical buffer spring (20) is sleeved with the valve stem (5), and the pressure plate (19) can compress the vertical buffer spring (20).

6. A pneumatic single-seat fast-response regulating valve according to claim 5, characterized in that: The valve stem (5) passes through the fixed outer frame (18) and the top cover (7), the valve core (8) is welded to the mounting frame (15), and the valve core (8) can move up and down with the mounting frame (15).

7. A pneumatic single-seat fast-response regulating valve according to claim 6, characterized in that: A sealing gasket (11) is provided at the bottom of the valve core (8), and a sealing ring (10) is provided at the connection of the valve body (9). The sealing gasket (11) on the valve core (8) can form a seal with the sealing ring (10).

Images