Streamline reinforced valve plate

Abstract

The utility model discloses a streamline reinforced valve plate, relates to the technical field of valves, and solves the problems that a traditional valve plate is large in fluid impact, high in energy consumption, heavy in structure, easy to vibrate and the like. According to the technical scheme, the incident flow surface of the valve plate is designed to be a continuous and smooth asymmetric streamline curved surface, and the thickness is gradually increased from the incident flow end and then contracts towards the back flow end; the valve plate is of a hollow structure with the hollow interior, reinforcing ribs are arranged in the valve plate, the distribution density of the reinforcing ribs is gradually increased from the rotating center to the edge, the connecting position of the valve rod is the highest, and the cross section can be rectangular, round or triangular. The valve plate and the reinforcing ribs are integrally formed in a casting mode and are made of stainless steel or duplex stainless steel. The effects that fluid impact and energy consumption are remarkably reduced, cavitation and vibration are restrained, light weight and high structural reliability are achieved, and the service life is prolonged are achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a streamlined reinforced valve plate. Background Technology

[0002] Butterfly valves, as fluid pipeline control components with simple structure and rapid opening and closing, are widely used in various fluid transport systems in power plants, such as circulating cooling water systems and chemical water treatment systems. The performance of its core component, the valve plate, directly affects the valve's working efficiency, pressure loss, and service life. In power plants, valves need to withstand the impact of high-speed fluids, pressure fluctuations, and potential cavitation phenomena for extended periods, placing extremely high demands on the strength and fatigue resistance of the valve plate. Currently, most butterfly valve plates used in power plants adopt a solid structure or a simple flat or double-flat plate form. To enhance the rigidity of the valve plate, uniformly distributed reinforcing ribs are usually set on the outside of the valve plate. However, this traditional design has the following significant drawbacks:

[0003] 1) Flat plate structures easily induce severe eddies, leading to large fluid impacts and frequent pressure fluctuations, resulting in high system energy consumption and the risk of cavitation damage; 2) Low structural efficiency: Solid or uniformly reinforced designs make the valve plate bulky, increasing the opening torque, and the stress distribution does not match the actual situation, posing a risk of local deformation or fatigue; 3) Shortcomings in manufacturing processes and materials: Modular manufacturing is prone to introducing defects, and the materials' corrosion resistance and cavitation resistance are insufficient, affecting long-term reliability. Therefore, how to research and design a streamlined reinforced valve plate that can overcome the above defects is an urgent problem we need to solve. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a streamlined reinforced valve plate. By synergistically integrating an optimized asymmetric streamlined curved surface, a stress-distribution-based gradient reinforced hollow structure, and a corrosion-resistant material integral molding process, a complete valve plate performance enhancement solution is formed. This achieves a comprehensive effect of significantly reducing fluid impact and energy consumption, effectively suppressing cavitation and vibration, ensuring high structural reliability while achieving significant weight reduction, and significantly improving durability. It provides a high-performance valve plate solution for demanding operating conditions such as power plants.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A streamlined reinforced valve plate is provided, wherein the valve plate is disposed within the flow channel of the valve body and fixedly connected to the valve stem, wherein:

[0007] The frontal surface of the valve plate is a continuous, smooth, streamlined curved surface;

[0008] The valve plate is a hollow structure with internal reinforcing ribs.

[0009] Furthermore, the contour of the streamlined surface is an asymmetrical structure, with its thickness gradually increasing from the thinnest at the front end and then gradually contracting and thinning towards the back end.

[0010] Furthermore, the point of maximum thickness of the valve plate is located in front of the central axis of the valve plate.

[0011] Furthermore, the valve plate has a thin-walled structure with a smooth transition at its edge.

[0012] Furthermore, the distribution density of the reinforcing ribs gradually increases from the edge of the valve plate towards the center of rotation.

[0013] Furthermore, the distribution density of the reinforcing ribs is highest in the area near the valve stem connection.

[0014] Furthermore, the cross-sectional shape of the reinforcing rib is one or more combinations of rectangle, circle, or triangle.

[0015] Furthermore, the valve plate and reinforcing ribs are integrally cast and made of stainless steel or duplex stainless steel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This utility model integrates three elements—an optimized asymmetric streamlined curved surface, a gradient-strengthened hollow structure based on stress distribution, and an integrated molding process using corrosion-resistant materials—to form a complete valve plate performance improvement solution. This achieves a comprehensive effect of significantly reducing fluid impact and energy consumption, effectively suppressing cavitation and vibration, ensuring high structural reliability while achieving significant weight reduction, and significantly improving durability. It provides a high-performance valve plate solution for demanding operating conditions such as power plants.

[0018] 2. This utility model, through the specific contour design of the streamlined curved surface, enables the fluid to transition smoothly, effectively suppresses the generation of eddies, thereby reducing the pressure loss and operating energy consumption of the valve system, and improving the cavitation resistance.

[0019] 3. Through the hollow structure and gradient distribution of reinforcing ribs, this utility model achieves a high degree of matching between the valve plate material distribution and the stress state, thereby significantly improving the stiffness and fatigue resistance of the valve plate while achieving lightweighting and reducing opening and closing torque.

[0020] 4. Through the integral molding casting and the selection of specific materials, this utility model ensures that the internal structure of the valve plate is uniform and without weak connection points, thereby guaranteeing the integrity and stability of the structure, giving it excellent corrosion resistance, and extending its service life. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of the streamlined reinforced valve plate in an embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the valve plate structure in an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the frontal surface in an embodiment of this utility model;

[0025] Figure 4 This is a schematic diagram showing the distribution of reinforcing ribs in an embodiment of this utility model.

[0026] The attached diagram shows the markings and corresponding component names:

[0027] 1. Valve body; 2. Valve plate; 21. Flow-facing surface; 22. Reinforcing rib; 3. Valve stem. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0030] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] Example: A streamlined reinforced valve plate 2, such as Figure 1 As shown, the valve plate 2 is located within the flow channel of the valve body 1 and is fixedly connected to the valve stem 3. The valve plate 2 opens and closes by rotating the valve stem 3 axially. The flow-facing surface 21 of the valve plate 2 is a continuous and smooth streamlined curved surface; the valve plate 2 is a hollow structure with internal reinforcing ribs 22.

[0033] In the process of controlling flow using a traditional flat plate valve, the opening and closing of the valve plate 2 will cause severe obstruction and impact on the fluid, forcing changes in the fluid motion state, resulting in sharp bending of streamlines, collision and friction between fluid particles, and the generation of large-scale, high-intensity vortex zones. This chaotic motion state will cause serious energy loss, equipment vibration, and potential cavitation corrosion damage to the entire fluid transport system. In order to solve this series of systemic problems caused by the poor fluid characteristics of the valve plate 2, this utility model optimizes the design by adopting a streamlined valve plate 2 with specific geometric features.

[0034] In some examples, the present invention designs the flow-facing surface 21 of the valve plate 2 as a continuous, smooth, asymmetric streamlined curved surface. For example... Figure 2 and Figure 3 As shown, the leading edge on its right end is designed to be relatively thin, smoothly splitting the fluid and transforming the violent frontal impact into a smooth flow around it; the middle part rises gently, guiding the fluid rather than forcibly blocking it, allowing the fluid to flow in accordance with the curved shape; the trailing edge on the left end adopts a slowly contracting design, providing a smooth confluence channel for the two fluid streams and avoiding the sudden generation of a low-pressure vortex region at the tail of valve plate 2. Its core principle is to actively intervene in and guide the motion state of the fluid. By controlling the acceleration and pressure changes of the fluid, the occurrence of flow separation is delayed to the maximum extent, enabling the fluid to maintain a laminar or stable turbulent boundary layer. This transforms the chaotic large-scale vortex that generates huge energy dissipation in traditional designs into a relatively ordered, smaller-scale flow structure with much lower energy loss.

[0035] In some examples, considering that power plant valves need to maintain efficient and stable operation under a wide range of flow conditions, the profile of their streamlined curved surfaces can be designed based on classical aerodynamic airfoil theory and modified for the characteristics of liquid media. By simulating the flow field characteristics of an airfoil at a small positive angle of attack, the laminar flow region can be maximized, the fluid can be smoothly accelerated, and the turbulence transition can be delayed, achieving the optimal lift-to-drag ratio characteristics under common partial opening conditions.

[0036] In some examples, considering the response of pressure distribution patterns when the fluid interacts with valve plate 2, the point of maximum thickness of valve plate 2 is located in front of the central axis. When the fluid impacts valve plate 2, the pressure load is not uniformly distributed, and the point of maximum dynamic pressure impact is usually located in front of the central axis. This design is to match the structural strength distribution of valve plate 2 with the fluid load distribution, ensuring that the valve plate 2 remains stable in its motion state when subjected to fluid impact and does not undergo harmful deformation, thereby maintaining the guiding effect of its streamlined design on the fluid motion state.

[0037] Meanwhile, considering that any sharp edge can become a "trigger point" for abrupt changes in the fluid's motion state, leading to instantaneous flow separation and the generation of new eddies, this invention employs a smoothly transitioned edge to ensure that the change in the fluid's motion state from the surface of valve plate 2 to the external flow field is continuous and gradual. This eliminates additional flow separation caused by geometric discontinuities, maintains the integrity of the smooth flow field that the streamlined surface attempts to establish, and further eliminates local eddies and the resulting energy loss and local scouring.

[0038] This utility model designs a streamlined curved surface that transforms the fluid into a controlled and smooth flow state, significantly reducing the impact loss when the fluid passes through the valve and significantly saving the operating energy consumption of the pumping system; the stable flow field protects the valve plate 2 and the internal surface of the valve body 1 from the impact damage of cavitation collapse; the stable flow also significantly reduces the vibration of the valve plate 2 and pipeline noise caused by periodic eddy shedding, improving the stability and reliability of the system operation.

[0039] Because the solid valve plate 2 is bulky and has high inertia, it results in large valve opening and closing torques, slow operation, and high requirements for the actuator. Therefore, this utility model adopts a hollow valve plate 2 structure to achieve significant weight reduction. However, considering that the hollow structure will significantly reduce the rigidity and strength of the valve plate 2, and cannot withstand the impact and pressure fluctuations of high-speed fluids in power plant pipelines, reinforcing ribs 22 must be installed inside the valve plate 2 for reinforcement.

[0040] However, considering that the internal stress actually experienced by the valve plate 2 during fluid impact is not uniformly distributed, the design of the reinforcing ribs 22 in this utility model is not simply uniformly distributed, but rather a gradient layout based on the mechanical properties of the valve plate 2 under actual working conditions. For example... Figure 4As shown, the distribution density of the reinforcing ribs 22 gradually increases from the outer edge of the valve plate 2 toward the center of rotation.

[0041] Because the connection point of valve stem 3 is the core area for torque transmission and stress concentration, the connection area between valve plate 2 and valve stem 3 reaches its maximum. This gradient reinforcement design mimics the mechanical structure of a skeleton in nature, precisely placing more reinforcing material on the critical path with the highest stress, thereby achieving optimal matching between the structural stiffness distribution of valve plate 2 and its bending moment and torque distribution during operation.

[0042] To further optimize mechanical properties and process characteristics, the cross-sectional shape of the stiffener 22 can be one or more combinations of rectangle, circle or triangle.

[0043] In some examples, rectangular sections are used in areas that bear the main bending moments, given that they have the largest moment of inertia and the best resistance to bending.

[0044] In some examples, considering that circular or elliptical cross sections are isotropic, have no sharp edges, and can effectively avoid stress concentration, circular cross sections can be used in edge regions;

[0045] In some examples, triangular cross-sections, which provide stable support in a specific direction, can be used in transition areas. By combining different shapes, a reinforcing network with excellent mechanical and technological properties can be constructed inside the valve plate 2.

[0046] The valve plate 2 and the reinforcing rib 22 are integrally cast to ensure, from a manufacturing perspective, that the complex curved surface and internal gradient reinforcement structure form a complete and continuous whole. Any connection method introduces discontinuities in materials and microstructure, creating local stress concentration points. Under long-term alternating loads, this can induce crack generation and propagation, altering the microscopic motion state within the material, such as dislocation slip and crack propagation, leading to structural failure. Integral casting avoids this potential defect, ensuring that the valve plate 2 responds to fluid loads as a whole, making its macroscopic motion state, such as vibration modes, more consistent with design expectations. The selection of stainless steel or duplex stainless steel is to control the chemical state of the material in corrosive environments and its microscopic damage state under cavitation impact. High-quality materials can resist corrosion and cavitation collapse impacts, maintaining a smooth and intact surface, thereby stably maintaining its intended hydrodynamic function over the long term.

[0047] This invention, through its hollow design and internal reinforcing ribs 22, significantly reduces weight while simultaneously improving rigidity and strength. The weight reduction directly lowers the valve's opening and closing torque, reducing the load on the actuator and improving response speed. Meanwhile, the gradient reinforcing ribs 22 ensure excellent resistance to deformation and fatigue under high-pressure fluid impact. Furthermore, by matching the optimal cross-sectional shape combination, it further improves casting formability, reduces the risk of internal defects, avoids localized stress concentration, and achieves a balance between lightweight design and high reliability.

[0048] Working Principle: This invention is based on the synergistic effect of fluid dynamics and structural mechanics: the asymmetric streamlined curved surface of the valve plate can smoothly guide the fluid and effectively suppress the generation of eddies, thereby significantly reducing the risk of fluid impact, pressure loss and cavitation; to achieve lightweighting, the valve plate adopts a hollow structure with gradient-distributed reinforcing ribs inside, with the density increasing from the rotation center to the edge and valve stem connection, so that the material distribution is precisely matched to the stress state, ensuring high rigidity and fatigue resistance while reducing weight; the one-piece casting process and stainless steel material ensure structural integrity and corrosion resistance, together achieving efficient, stable and durable working effect.

[0049] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A streamlined reinforcing valve plate characterized by, The valve plate (2) is disposed in the flow channel of the valve body (1) and is fixedly connected to the valve stem (3), wherein: The frontal surface (21) of the valve plate (2) is a continuous and smooth streamlined curved surface; The valve plate (2) is a hollow structure with internal hollow parts and is provided with reinforcing ribs (22).

2. A streamlined reinforcing valve plate according to claim 1, wherein The streamlined surface has an asymmetrical profile, with its thickness gradually increasing from the thinnest point at the front end and then gradually thinning towards the back end.

3. A streamlined reinforcing valve plate according to claim 1, wherein, The point of maximum thickness of the valve plate (2) is located in front of the central axis of the valve plate (2).

4. A streamlined reinforcing valve plate according to claim 1, wherein, The valve plate (2) has a thin-walled structure with a smooth transition at the edge.

5. A streamlined reinforcing valve plate according to claim 1, wherein, The distribution density of the reinforcing ribs (22) gradually increases from the edge of the valve plate (2) toward the center of rotation.

6. A streamlined reinforcing valve plate according to claim 1, wherein, The distribution density of the reinforcing ribs (22) is highest in the area near the connection of the valve stem (3).

7. A streamlined reinforcing valve plate according to claim 1, wherein The cross-sectional shape of the reinforcing rib (22) is one or more combinations of rectangle, circle or triangle.

8. A streamlined reinforcing valve plate according to claim 1, wherein, The valve plate (2) and the reinforcing rib (22) are integrally cast and are made of stainless steel or duplex stainless steel.

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