Cone valve

锥形阀is a high-pressure working valve that adjusts flow by changing the distance between the movable valve sleeve and the fixed cone, mainly used in flood discharge, flow regulation, and energy dissipation scenarios of water conservancy and hydropower projects. Its core features and applications are as follows:

‌一、结构原理‌1、 Structural principle
Basic Structure
Composed of a fixed cone, a movable valve sleeve (outer or inner sleeve), and a driving device, the flow rate is controlled by changing the annular flow area through axial movement of the valve sleeve.
Outer sleeve type: The valve sleeve is externally mounted, easy to maintain, and suitable for high pressure differential scenarios (such as DN200-2200mm, PN0.6-4.0MPa).
Internal sleeve type: The valve core is built-in, with a compact structure but high maintenance costs.
Energy dissipation mechanism
When water diffuses through a conical structure, it consumes kinetic energy through turbulence, rolling, and aeration, with an energy dissipation rate of up to 70% -90%.
The curved conical valve integrates an arc-shaped flow channel, which forcibly turns the water flow for pre energy dissipation, significantly reducing downstream impact and vibration.
2、 Performance advantages
Wear resistant and durable
The valve core is made of high chromium alloy cast iron or stainless steel overlay (hardness ≥ HRC55), which is resistant to sand and water erosion and has a lifespan 3-5 times longer than carbon steel.
Precise regulation
The flow rate is linearly related to the displacement of the valve core, and the electric drive accuracy reaches 0.1mm level with an error of<2%, supporting 0-100% stepless adjustment.
Suitable for precise operations such as ecological flow reduction and peak flood response.
Efficient energy dissipation and corrosion reduction
‌高效消能减蚀‌

‌弯管式优势‌：云南水电站8年磨损量
The straight pipe jet is concentrated and relies on a dissipation pool for energy dissipation, which can easily cause cavitation and erosion.
Advantages of bent pipe design:
Internal consumption of 40% -60% kinetic energy, reducing the size of the dissipation pool;
Uniform diffusion of water flow reduces the depth of riverbed erosion;
Aeration design suppresses cavitation and extends valve life.
3、 Typical application scenarios
Scenario Function Cases and Effects
High pressure flood discharge and flow regulation of the flood discharge system of the Three Gorges Dam achieve precise flow control of 800m3/s
The pressure of the reservoir water diversion project pipeline network is stable, and the waterproof hammer has increased the flood control response speed of a reservoir in Sichuan by 50%
Sand laden water flow management, anti-wear and discharge, Yunnan hydropower station, 8-year wear and tear amount