The working principle of an eccentric hemisphere valve is to control the flow and pressure of the fluid by rotating the hemisphere valve core. When the hemispherical valve core rotates, fluid will flow from the inlet of the valve into the interior of the hemispherical valve core, and then flow out through the outlet of the hemispherical valve core. The rotation angle of the hemispherical valve core determines the flow rate and pressure of the fluid, so fluid control and adjustment can be achieved by controlling the rotation angle of the hemispherical valve core.

二、结构特点

2、 Structural characteristics

偏心半球阀的结构特点主要包括以下几个方面：

The structural characteristics of eccentric hemisphere valves mainly include the following aspects:

1. 阀体：偏心半球阀的阀体通常采用球体结构，球体的一侧是半球形的，另一侧是圆形的。半球形的一侧是阀门的进口，圆形的一侧是阀门的出口。

1. Valve body: The valve body of an eccentric hemispherical valve usually adopts a spherical structure, with one side of the sphere being hemispherical and the other side being circular. The hemispherical side is the inlet of the valve, and the circular side is the outlet of the valve.

2. 半球阀芯：半球阀芯是偏心半球阀的核心部件，它的形状类似于一个半球形的碗。半球阀芯的一侧是凸出的，另一侧是凹陷的。凸出的一侧与阀体的半球形一侧相对应，凹陷的一侧与阀体的圆形一侧相对应。

2. Hemisphere valve core: The hemispherical valve core is the core component of an eccentric hemispherical valve, and its shape is similar to a hemispherical bowl. One side of the hemispherical valve core is protruding, and the other side is concave. The protruding side corresponds to the hemispherical side of the valve body, and the concave side corresponds to the circular side of the valve body.

3. 传动装置：偏心半球阀的传动装置通常采用手动、电动或气动传动装置。手动传动装置通常采用手轮或手柄，电动传动装置通常采用电机和减速器，气动传动装置通常采用气动执行器。

3. Transmission device: The transmission device of the eccentric hemisphere valve usually adopts manual, electric, or pneumatic transmission devices. Manual transmission devices typically use handwheels or handles, electric transmission devices typically use motors and reducers, and pneumatic transmission devices typically use pneumatic actuators.

4. 密封结构：偏心半球阀的密封结构通常采用软密封或金属密封。软密封通常采用橡胶或聚四氟乙烯等材料，金属密封通常采用不锈钢或钛合金等材料。

4. Sealing structure: The sealing structure of eccentric hemisphere valves usually adopts soft sealing or metal sealing. Soft seals typically use materials such as rubber or polytetrafluoroethylene, while metal seals typically use materials such as stainless steel or titanium alloy.

三、应用领域

3、 Application field

偏心半球阀广泛应用于石油、化工、冶金、电力、水处理等行业，主要用于控制流体的流量和压力。它的优点是结构简单、操作方便、密封性好、耐腐蚀性强、使用寿命长等。在石油和化工行业中，偏心半球阀通常用于控制高温、高压、腐蚀性强的介质，如酸、碱、盐等。在水处理行业中，偏心半球阀通常用于控制污水、废水等介质的流量和压力。

Eccentric hemispherical valves are widely used in industries such as petroleum, chemical, metallurgical, power, and water treatment, mainly for controlling fluid flow and pressure. Its advantages include simple structure, convenient operation, good sealing, strong corrosion resistance, and long service life. In the petroleum and chemical industries, eccentric hemisphere valves are usually used to control high temperature, high pressure, and highly corrosive media, such as acids, alkalis, salts, etc. In the water treatment industry, eccentric hemispherical valves are usually used to control the flow and pressure of media such as sewage and wastewater.

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