Valve plug for a regulating valve and regulating valve

Abstract

The application relates to a valve plug for a regulating valve and a regulating valve, which comprises a sealing plate, a plurality of adjusting parts arranged on the edge of one side of the sealing plate and arranged along the circumference of the sealing plate and arranged in a central symmetry with the center line of the sealing plate, the adjusting part comprising a first adjusting part and a second adjusting part, the width of the first adjusting part gradually decreasing in the direction away from the sealing plate, the second adjusting part being arranged at the end of the first adjusting part away from the sealing plate, the width of the second adjusting part being equal to the width of the end of the first adjusting part away from the sealing plate, and the adjusting port being formed between two adjacent adjusting parts. The valve plug for the regulating valve and the regulating valve can improve the flow regulating precision of the regulating valve.

Description

Technical Field

[0001] This invention relates to the field of valve plug structure technology, and in particular to a valve plug for a regulating valve and a regulating valve. Background Technology

[0002] A control valve is a valve body used to control flow rate. It controls the flow rate by moving an internal valve plug, thereby controlling the cross-sectional area of ​​the fluid passage. Currently, unbalanced control valves use a frustum-shaped valve plug. As the plug rises, the distance between the plug and the valve seat gradually increases, thus increasing the cross-sectional area of ​​the fluid passage and achieving flow control. However, for small pipelines in light industry such as instrument cooling circuits, auxiliary pipelines in the chemical and pharmaceutical industries, and laboratory equipment, where precise flow control is required, the frustum-shaped valve plug, which only adjusts the distance between the plug and the valve seat, results in relatively low flow control accuracy. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a valve plug for a regulating valve and a regulating valve, which can improve the flow regulation accuracy of the regulating valve.

[0004] To solve the above-mentioned technical problems, the present invention provides a valve plug for a regulating valve, comprising: a sealing plate; and adjusting members, wherein a plurality of adjusting members are located on one side edge of the sealing plate and are arranged circumferentially along the sealing plate and centrally symmetrically along the center line of the sealing plate. Each adjusting member includes a first adjusting portion and a second adjusting portion. The width of the first adjusting portion gradually decreases in the direction away from the sealing plate. The second adjusting portion is located at the end of the first adjusting portion away from the sealing plate, and the width of the second adjusting portion is equal to the width of the end of the first adjusting portion away from the sealing plate. An adjusting port is formed between two adjacent adjusting members.

[0005] In one embodiment of the present invention, a protrusion is provided at the center of one side of the sealing plate, the end of the protrusion is spherical, and the diameter of the protrusion gradually increases towards the sealing plate. The protrusion and the adjusting member are located on the same side of the sealing plate.

[0006] In one embodiment of the present invention, a first reinforcing part is provided at the position where the first adjusting part is in contact with the sealing plate, the width of the first reinforcing part gradually increases towards the first adjusting part, and the side of the first reinforcing part away from the first adjusting part is arc-shaped.

[0007] In one embodiment of the present invention, the adjusting member is provided with a second reinforcing part, one end of the second reinforcing part is connected to the first reinforcing part, and the other end of the second reinforcing part is located at the end of the second adjusting part away from the sealing plate.

[0008] In one embodiment of the present invention, the included angle between the planes containing the sidewalls of two adjacent first adjustment parts is 50°-60°.

[0009] In one embodiment of the present invention, a connector is further included, the connector being located on the side of the sealing plate away from the adjusting member, and the end of the connector away from the sealing plate is provided with a first connecting hole.

[0010] In one embodiment of the present invention, the side wall of the connector is provided with a second connecting hole, which communicates with the first connecting hole.

[0011] In one embodiment of the invention, the sidewall of the connector includes two parallel clamping surfaces.

[0012] In one embodiment of the present invention, the sidewall of the sealing plate is provided with three adjusting members.

[0013] The present invention also provides a regulating valve, including the valve plug for the regulating valve described above.

[0014] The technical solution of the present invention has the following advantages compared with the prior art:

[0015] The present invention discloses a valve plug and a regulating valve for a regulating valve. By gradually decreasing the width of the first adjusting part in the adjusting component away from the sealing plate, the width of the adjusting port between the first adjusting parts gradually increases away from the sealing plate. This ensures that the cross-sectional area of ​​the fluid channel remains constant per unit distance the valve plug rises, resulting in a linear increase in fluid flow rate with the valve plug's ascent. This achieves precise flow rate regulation and improves the flow rate regulation accuracy of the regulating valve. Furthermore, compared to controlling flow rate by adjusting the distance between the valve plug and the valve seat, the valve plug of this invention uses a design where fluid flows through the adjusting port on the valve plug's side wall. Therefore, with the same volume, fluid flowing through the adjusting port on the valve plug's side wall increases the flow rate regulation range of the regulating valve. The protrusion at the bottom of the sealing plate reduces turbulence interference on the valve plug, ensuring smooth fluid flow. Attached Figure Description

[0016] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of a valve plug for a regulating valve according to the present invention;

[0018] Figure 2 yes Figure 1 A schematic diagram of the bottom structure;

[0019] Figure 3 This is a schematic diagram of another embodiment of the valve plug for a regulating valve;

[0020] Figure 4 This is a schematic diagram of the control valve.

[0021] Figure 5 This is a schematic diagram of the assembly structure of the valve stem, valve cover, and valve body;

[0022] Figure 6 yes Figure 5 A sectional view.

[0023] Explanation of reference numerals in the accompanying drawings: 1. Valve plug; 2. Actuator; 3. Valve stem; 4. Valve cover; 5. Valve body; 6. Valve seat; 11. Sealing plate; 12. First adjusting part; 13. Second adjusting part; 14. Connecting part; 15. Clamping surface; 16. First connecting hole; 17. Second connecting hole; 18. Protrusion; 19. First reinforcing part; 31. Fastener; 32. Seal; 51. Input end; 52. Output end; 121. Equal width part; 122. Gradient part; 191. Second reinforcing part. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0025] Reference Figure 1 As shown, a valve plug for a regulating valve according to the present invention includes: a sealing plate 11; and adjusting members, wherein a plurality of adjusting members are located on one side edge of the sealing plate 11 and are arranged circumferentially along the sealing plate 11 and centrally symmetrically along the center line of the sealing plate 11. Each adjusting member includes a first adjusting portion 12 and a second adjusting portion 13. The width of the first adjusting portion 12 gradually decreases in the direction away from the sealing plate 11. The second adjusting portion 13 is located at the end of the first adjusting portion 12 away from the sealing plate 11, and the width of the second adjusting portion 13 is equal to the width of the end of the first adjusting portion 12 away from the sealing plate 11. An adjusting port is formed between two adjacent adjusting members.

[0026] This embodiment provides a valve plug for a regulating valve. Fluid flows through an adjustment port between two adjacent regulating components. During operation, the cross-sectional area of ​​the fluid channel formed by the regulating component and the valve seat 6 is changed by raising and lowering the valve plug 1, thereby controlling the fluid flow rate. The width of the first regulating part 12 in the regulating component gradually decreases in the direction away from the sealing plate 11, while the width of the adjustment port between the first regulating parts 12 gradually increases in the direction away from the sealing plate 11. This ensures that the cross-sectional area of ​​the fluid channel increases constantly per unit distance the valve plug 1 rises, resulting in a linear increase in fluid flow rate as the valve plug 1 rises. This achieves precise flow rate regulation and improves the flow rate regulation accuracy of the regulating valve. Furthermore, compared to controlling flow rate by adjusting the distance between the valve plug 1 and the valve seat 6, the valve plug 1 of this invention uses an adjustment port on its side wall for fluid flow. Therefore, with the same volume, the flow rate regulation range of the regulating valve can be increased by allowing fluid to flow through the adjustment port on the side wall of the valve plug 1.

[0027] The sealing plate 11 is generally circular, and its sidewalls can abut against the valve seat 6, thereby closing the fluid passage.

[0028] Reference Figure 1 and Figure 2 As shown, the regulating element is used to control the flow rate of the fluid. The regulating element is located on the edge of the sealing plate 11. Specifically, the regulating element is located on the bottom edge of the sealing plate 11. Multiple regulating elements are arranged circumferentially along the sealing plate 11 and symmetrically arranged along the center line of the sealing plate 11.

[0029] The outer wall of the adjusting component is arc-shaped and can fit against the inner wall of the valve seat 6. The adjusting component includes a first adjusting part 12 and a second adjusting part 13. The top end of the first adjusting part 12 is connected to the sealing plate 11, and the second adjusting part 13 is located at the end of the first adjusting part 12 away from the sealing plate 11, that is, the second adjusting part 13 is located at the bottom end of the first adjusting part 12. An adjusting port is formed between two adjacent adjusting components for fluid flow. The width of the first adjusting part 12 gradually decreases in the direction away from the sealing plate 11, thereby gradually increasing the width of the adjusting port between the first adjusting parts 12 in the direction away from the sealing plate 11. The included angle between the planes containing the side walls of two adjacent first adjusting parts 12 is 50°-60°, and the included angle between the side walls of two adjacent first adjusting parts 12 is fixed, that is, the included angle of the side walls at each position between two adjacent first adjusting parts 12 is a fixed value. When fluid flows through the regulating port between two adjacent first regulating parts 12, the cross-sectional area of ​​the fluid channel gradually increases as the valve plug 1 rises. Since the width of the regulating port gradually increases away from the sealing plate 11, the fluid flow rate increases linearly with the rise of the valve plug 1, achieving precise flow rate regulation. The width of the second regulating part 13 is equal to the width of the first regulating part 12 at the end away from the sealing plate 11, and the length of the second regulating part 13 is less than the length of the first regulating part 12. The sidewalls of two adjacent second regulating parts 13 are parallel, making the vertical width of the regulating port between two adjacent second regulating parts 13 equal. When fluid flows through the regulating port between two adjacent second regulating parts 13, the fluid flow rate increases rapidly. As the valve plug 1 rises, the cross-sectional area of ​​the fluid channel increases proportionally, ensuring flow rate regulation accuracy even at high flow rates. Furthermore, the fact that the width of the second regulating part 13 is equal to the width of the first regulating part 12 at the end away from the sealing plate 11 prevents sudden increases in fluid flow rate, improving the stability of flow rate control. In this invention, the valve plug 1 is designed so that fluid flows through the adjustment port on the side wall of the valve plug 1. This allows for increased flow rate regulation range of the regulating valve while maintaining the same volume. During the movement of the valve plug 1, the side wall of the adjusting member remains against the inner wall of the valve seat 6, providing guidance and preventing the valve plug 1 from shifting due to fluid pressure. This ensures the overall stability of the valve plug 1, effectively counteracting fluid disturbances and preventing valve plug 1 from shaking, thus guaranteeing flow rate regulation accuracy. Compared to the frustum-shaped block valve plug 1 in the prior art, the valve plug of this invention is lighter, reducing the energy consumption of the regulating valve actuator 2. Preferably, the bottom of the sealing plate 11 has three adjusting members. These three members ensure high flow rate regulation accuracy while also providing a larger contact area between the adjusting members and the valve seat 6, resulting in stronger load-bearing capacity and overall stability of the valve plug 1.

[0030] A protrusion 18 is provided at the center of one side of the sealing plate 11. The protrusion 18 and the adjusting component are located on the same side of the sealing plate 11, that is, the protrusion 18 is located at the bottom of the sealing plate 11. The end of the protrusion 18 is spherical, and the diameter of the protrusion 18 gradually increases towards the sealing plate 11, thus making the surface of the protrusion 18 arc-shaped. The protrusion 18 reduces the interference of turbulence on the valve plug 1, allowing the fluid to flow smoothly.

[0031] A first reinforcing part 19 is provided at the position where the first adjusting part 12 contacts the sealing plate 11. The width of the first reinforcing part 19 gradually increases towards the first adjusting part 12, and the side of the first reinforcing part 19 away from the first adjusting part 12 is arc-shaped. The arc-shaped side of the first reinforcing part 19 extends from the first adjusting part 12 toward the sealing plate 11. By providing the first reinforcing part 19, the strength of the adjusting part can be improved, and because the surface of the first reinforcing part 19 is smooth and includes an arc-shaped side, it can avoid affecting the flow of fluid.

[0032] The adjusting component also includes a second reinforcing part 191. One end of the second reinforcing part 191 is connected to the bottom end of the first reinforcing part 19, and the other end of the second reinforcing part 191 is located at the end of the second adjusting part 13 away from the sealing plate 11, that is, the other end of the second reinforcing part 191 is located at the bottom end of the second adjusting part 13. The second reinforcing part 191 is semi-cylindrical in shape, so that the surface of the second reinforcing part 191 is arc-shaped, thereby enabling the second reinforcing part 191 to improve the strength of the adjusting component while avoiding affecting the flow of fluid.

[0033] The valve plug for the regulating valve also includes a connector 14, which is located on the side of the sealing plate 11 away from the regulating member. Specifically, the connector 14 is cylindrical and located at the top center of the sealing plate 11. A first connecting hole 16 is provided at the end of the connector 14 away from the sealing plate 11, for connecting to the valve stem 3. A second connecting hole 17 is provided on the side wall of the connector 14, communicating with the first connecting hole 16. A fastener 31 is connected through the second connecting hole 17, thereby making the connection between the valve stem 3 and the valve plug 1 more stable. The fastener 31 can be considered as a fastening screw. The side wall of the connector 14 includes two opposing and parallel clamping surfaces 15. The clamping surfaces 15 facilitate clamping, fixing, and handling of the regulating valve during processing, achieving precise and stable clamping.

[0034] Reference Figure 3As shown, in another embodiment, the first regulating part 12 of the regulating valve includes a constant width portion 121 and a gradual change portion 122. The constant width portion 121 is connected to the sealing plate 11. The regulating port between two adjacent constant width portions 121 has the same width in the vertical direction and the regulating port width is small. This makes the increase in fluid cross-sectional area smaller as the valve plug 1 rises when the fluid flows through the regulating port between two adjacent constant width portions 121, and the rate of change of the increase is also small, thereby achieving high-precision regulation of the flow rate. The bottom of the gradient section 122 is connected to the bottom of the equal-width section 121. The width of the gradient section 122 gradually decreases away from the sealing plate 11. The sidewall of the transition position between the gradient section 122 and the equal-width section 121 is arc-shaped. The included angle between the planes containing the sidewalls of two adjacent gradient sections 122 is 150°-160°, which makes the width of the adjustment port between two adjacent gradient sections 122 increase rapidly. As the valve plug 1 rises, the flow rate of the fluid increases rapidly when the fluid flows through the adjustment port between two adjacent gradient sections 122, thus adapting to the medium-amplitude flow rate adjustment requirements. The second adjusting section 13 is connected to the bottom of the gradient section 122. The width of the second adjusting section 13 is smaller than the bottom width of the first adjusting section 12, that is, the width of the second adjusting section 13 is smaller than the bottom width of the gradient section 122. The sidewalls of two adjacent second adjusting sections 13 are parallel, so that the vertical width of the adjusting port between two adjacent second adjusting sections 13 is equal. When the fluid flows through the adjusting port between two adjacent second adjusting sections 13, as the valve plug 1 rises, the fluid flow rate increases rapidly, thereby adapting to the large-scale flow rate adjustment requirements. The adjusting component of this embodiment realizes three-stage flow rate adjustment, thus being suitable for adjustment requirements when the flow rate needs to fluctuate significantly.

[0035] Reference Figure 4 As shown, the present invention also provides a regulating valve, including the valve plug for the regulating valve described above.

[0036] Reference Figure 5 and Figure 6As shown, the regulating valve also includes an actuator 2, a valve body 5, a valve stem 3, a valve cover 4, and a valve seat 6. The actuator 2 can be considered as a pneumatic spring diaphragm actuator 2. The output end 52 of the actuator 2 is connected to the top of the valve stem 3, and the actuator 2 can drive the valve stem 3 to rise and fall. The actuator 2 is connected to the valve cover 4, and the valve cover 4 is connected to the top of the valve body 5. The valve body 5 includes an adjustment channel that runs through the valve body 5. The valve seat 6 is located in the middle of the adjustment channel, and the valve plug 1 is located in the inner cavity of the valve seat 6 and fits against the inner cavity sidewall. The top of the valve cover 4 is provided with a through hole, through which the valve stem 3 passes. A sealing element 32 is provided between the valve stem 3 and the sidewall of the through hole to prevent fluid leakage between the valve stem 3 and the sidewall of the through hole. The bottom end of the valve stem 3 is inserted into the first connecting hole 16 of the connecting element 14 in the valve plug 1. The connecting hole is connected to a fastener 31, which passes through the valve stem 3, thereby ensuring a stable connection between the valve stem 3 and the valve plug 1. To improve the sealing performance between the valve plug 1 and the valve seat 6, a sealing ring is circumferentially fitted on the side wall of the sealing plate 11. The sealing ring abuts against the inner end of the valve seat 6, thereby improving the sealing performance between the valve plug 1 and the valve seat 6. The regulating channel includes an input end 51 and an output end 52. Fluid enters the regulating channel from the input end 51, and the fluid applies pressure to the bottom of the valve plug 1. When the regulating port is located inside the inner cavity of the valve seat 6, the regulating channel is in a flow state. Fluid enters the regulating channel from the input end 51, passes through the fluid channel formed between the valve plug 1 and the valve seat 6, and can flow out from the output end 52 of the regulating channel.

[0037] In use, the sealing plate 11 abuts against the top of the valve seat 6, at which point the regulating channel is in a state of flow interruption. When the actuator 2 drives the valve stem 3 to rise, the valve stem 3 drives the valve plug 1 to rise until part of the regulating port is located outside the inner cavity of the valve seat 6, and the fluid flows through the regulating port. The actuator 2 drives the valve plug 1 to continue to rise, increasing the flow rate of the regulating channel. The actuator 2 drives the valve plug 1 to move to different positions, thereby regulating the flow rate of the regulating valve. When it is necessary to interrupt the flow of the regulating channel, the actuator 2 drives the valve plug 1 to descend until the sealing plate 11 abuts against the end of the valve seat 6.

[0038] This invention discloses a valve plug and a regulating valve for a regulating valve. By gradually decreasing the width of the first adjusting portion 12 in the adjusting member away from the sealing plate 11, the width of the adjusting port between the first adjusting portions 12 gradually increases away from the sealing plate 11. This ensures that the cross-sectional area of ​​the fluid passage remains constant as the valve plug 1 rises a unit distance, resulting in a linear increase in fluid flow rate with the rise of the valve plug 1. This achieves precise flow rate regulation and improves the flow rate regulation accuracy of the regulating valve. Furthermore, compared to controlling flow rate by adjusting the distance between the valve plug 1 and the valve seat 6, this invention uses a design where fluid flows through the adjusting port on the side wall of the valve plug 1. Therefore, with the same volume, fluid flowing through the adjusting port on the side wall of the valve plug 1 can increase the flow rate regulation range of the regulating valve. The protrusion 18 at the bottom of the sealing plate 11 reduces turbulence interference on the valve plug 1, allowing for smooth fluid flow.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A valve plug for a regulating valve, characterized in that, include: Sealing plate; The adjusting members are located on one side of the sealing plate and are arranged circumferentially along the sealing plate and are centrally symmetrical about the center line of the sealing plate. Each adjusting member includes a first adjusting part and a second adjusting part. The width of the first adjusting part gradually decreases in the direction away from the sealing plate. The second adjusting part is located at the end of the first adjusting part away from the sealing plate, and the width of the second adjusting part is equal to the width of the end of the first adjusting part away from the sealing plate. An adjusting opening is formed between two adjacent adjusting members.

2. The valve plug for the regulating valve according to claim 1, characterized in that: The center of one side of the sealing plate is provided with a protrusion, the end of the protrusion is spherical, and the diameter of the protrusion gradually increases towards the sealing plate. The protrusion and the adjusting member are located on the same side of the sealing plate.

3. The valve plug for the regulating valve according to claim 1, characterized in that: A first reinforcing part is provided at the position where the first adjusting part is in contact with the sealing plate. The width of the first reinforcing part gradually increases towards the first adjusting part, and the side of the first reinforcing part away from the first adjusting part is arc-shaped.

4. The valve plug for the regulating valve according to claim 3, characterized in that: The adjusting member is provided with a second reinforcing part, one end of which is connected to the first reinforcing part, and the other end of which is located at the end of the second adjusting part away from the sealing plate.

5. The valve plug for the regulating valve according to claim 1, characterized in that: The included angle between the planes containing the two adjacent sidewalls of the first adjustment section is 50°-60°.

6. The valve plug for the regulating valve according to claim 1, characterized in that: It also includes a connector located on the side of the sealing plate away from the adjusting member, and the end of the connector away from the sealing plate is provided with a first connecting hole.

7. The valve plug for a regulating valve according to claim 6, characterized in that: The side wall of the connector is provided with a second connection hole, which communicates with the first connection hole.

8. The valve plug for a regulating valve according to claim 6, characterized in that: The sidewall of the connector includes two parallel clamping surfaces.

9. The valve plug for the regulating valve according to claim 1, characterized in that: The side wall of the sealing plate is provided with three adjusting components.

10. A regulating valve, characterized in that, Including the valve plug for the regulating valve as described in any one of claims 1-9.

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