Energized Elastic Seat Structure and Double Eccentric Butterfly Valve Using It

Abstract

The invention relates to an energy-increased elastic sealing valve structure and a double-eccentric butterfly valve applying the same. The energy-increased elastic sealing valve structure comprises a valve seat assembly and a press ring, wherein the valve seat assembly comprises a V-shaped spring, a non-metal elastic sealing ring, a metal sealing ring and a valve seat. The metal sealing ring is arranged on the inner side of the valve seat, the metal sealing ring is a circular-ring-shaped, and the inner edge and the outer edge of the metal sealing ring are respectively provided with an inner peripheral C-shaped ring and an outer peripheral C-shaped ring. An outer ring groove and an inner ring groove which are concentric are arranged on the inner end face of the valve seat, and an annular step is arranged between the outer ring groove and the inner ring groove. The inner peripheral C-shaped ring and the outer peripheral C-shaped ring of the metal sealing ring are respectively arranged in the inner ring groove and the outer ring groove of the inner end face of the valve seat, and the middle plane of the metal sealing ring strides on the annular step and is kept suspended. The non-metal elastic sealing ring is arranged on the outer side of the valve seat and is pressed and positioned through the press ring. The energy-increased elastic sealing valve structure has a certain-degree automatic compensation function to an abraded sealing face, can achieve effective sealing and has a fireproof function.

Description

technical field [0001] The invention relates to valve equipment, in particular to an energy-enhancing elastic sealing valve seat structure and a double eccentric butterfly valve using the same, which belongs to the technical field of fluid control valves. Background technique [0002] With the development of the economy, the level of industrial automation control is constantly improving, so the requirements for the reliability of valves in process control are also continuously improved, and higher requirements are also put forward for the sealing performance of valves. In the existing technology, the metal seal butterfly valve generally does not have high requirements on the leakage level. At the same time, the required torque is relatively large, and the wear of the sealing surface is large. After a long time of work, the sealing surface is prone to leakage gaps, and the long-term good sealing of the valve cannot be guaranteed. performance; non-metallic sealing butterfly va...

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Problems solved by technology

In the existing technology, the metal seal butterfly valve generally does not have high requirements on the leakage level. At the same time, the required torque is relatively large, and the wear of the sealing surface is large. After a long time of work, the sealing surface is prone to leakage gaps, and the long-term good sealing of the valve cannot be guaranteed. performance; non-metallic sealing butterfly valves are generally not suitable for high-temperature conditions, especially in the event of a fire; the traditional three-eccentric butterfly valve has problems such as high production costs and high requirements for workers to assemble; therefore, the development of a low production cost, Butterfly valves with strong versatility, fire protection function and high leakage level requirements have become an urgent demand

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