Ultra-high-temperature metal sealing valve seat

Abstract

The invention discloses an ultra-high-temperature metal sealing valve seat. The ultra-high-temperature metal sealing valve seat comprises a valve body; a butterfly plate component is mounted in the valve body; and a sealing seat is mounted on one side of the butterfly plate component. According to the ultra-high-temperature metal sealing valve seat, the structure is scientific and reasonable, andthe use is safe and convenient; as the butterfly plate component is arranged, the hardness of the surface of a butterfly plate is enhanced under the actions of an elliptical conical surface and an STLalloy layer, the sealing reliability of the device is enhanced, and meanwhile, the sealing effect of the ultra-high-temperature metal sealing valve seat is improved to a bubble level; under the actions of a connecting pipe, a connecting hole and a limiting sealing groove, the ultra-high-temperature metal sealing valve seat is enabled to be connected to an eccentric valve rod conveniently, and theconnecting effect between the butterfly plate and the eccentric valve rod is improved; as a sealing seat is arranged, the elliptical conical surface of the butterfly plate is enabled to be embedded in a circular groove conveniently under the actions of a connecting head and the circular groove so as to change the shape of the elliptical conical surface of the butterfly plate; and moreover, the elliptical conical surface of the butterfly plate is coated to form a sealing surface so that an influence from heating state and condition of a material is effectively eliminated and the heat resistingeffect and sealing effect of the device are improved.

Description

technical field [0001] The invention relates to the technical field of sealing valve seats, in particular to an ultra-high temperature metal sealing valve seat. Background technique [0002] The valve seat is a detachable surface part in the valve, which is used to support the fully closed position of the valve core and form a sealing pair. Generally, the diameter of the valve seat is the maximum flow diameter of the valve. For example, the material of the valve seat of the butterfly valve is very wide, various types of rubber, plastic , metal materials can be used as the seat material, which uses elastic sealing material and small actuator thrust to obtain air bubble tight sealing, compressing the sealing stress of the valve seat makes the material elastically deform and squeeze into the rough surface of the matching metal parts , to block all leak paths. [0003] Due to the limitation of structural features, it is not suitable for high temperature resistant working enviro...

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Problems solved by technology

[0003] Due to the limitation of structural features, it is not suitable for high temperature resistant working environment, which limits its scope of use, and ordinary valve seat valves are prone to gaps at the switch connection, resulting in poor sealing effect. When the valve is working, the valve is in the During the switching process, the valve seat and the sealing ring are prone to friction, which will cause wear at the valve joint, reduce its sealing effect, and reduce the service performance and life of the valve. The packing equipment of the ordinary valve seat is filled with a single graphite packing. When the pressure is too large, it is easy to break and fall into the circuit of the device, affecting the normal operation of the device. Due to the long-term work of the valve seat, the packing inside the valve seat is easy to produce axial deformation after being accepted and tends to move toward the eccentric valve stem and the packing device. Squeeze on the inner wall of the packing until it reaches the limit of deformation, thus losing a part of the packing force. Repeatedly, the packing force between the packings will be continuously consumed, which will lead to packing leakage and reduce the sealing effect of the device. Therefore, it is urgently needed A super high temperature metal sealing valve seat to solve the above problems

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