Nuclear power island core reheat steam main flow control valve spool and its processing technology

Abstract

The invention relates to a nuclear power island center reheat steam main-flow-control-valve valve element. The nuclear power island center reheat steam main-flow-control-valve valve element comprisesa labyrinth seat, a plurality of labyrinth discs and a labyrinth close cover. A circular groove is formed in the middle of the bottom of the labyrinth seat, the top of the labyrinth close cover extends into the circular groove of the labyrinth seat and is fixedly connected with the labyrinth seat, and a plurality of round holes are evenly formed in the side wall of the labyrinth close cover. Ringprotrusions are arranged at the bottom of the labyrinth close cover, the multiple labyrinth discs are installed on the labyrinth close cover in a sleeving mode, the labyrinth discs are in rotational contact with the labyrinth close cover, the labyrinth discs are supported on the ring protrusions, and the uppermost one of the labyrinth discs is in clearance contact with the labyrinth seat. A plurality of turbine structures are evenly arranged on the labyrinth discs, and the multiple labyrinth discs are stacked to jointly form a labyrinth structure. A sealing surface is arranged on the outer peripheral surface of the labyrinth seat so as to form the sealing surface of the valve element. The design is reasonable, the structure is simple, the rotary labyrinth disc design is adopted, pressure regulating and flow stabilizing are carried out on a medium by using the rotation of the labyrinth discs, and the pressure regulating effect is good.

Description

technical field [0001] The invention relates to the technical field of power plant valves, in particular to a core of a nuclear power island core reheat steam main flow control valve core and a processing technology thereof. Background technique [0002] In the past, the labyrinth valve core used in the reheat steam main flow control valve of nuclear power island center generally adopts fixed labyrinth discs, and the labyrinth structure composed of fixed labyrinth discs plays a role of decompression to a certain extent. But the effect is not good, and it does not have the effect of steady flow. Contents of the invention [0003] The invention proposes a main flow control valve core for reheating steam in a nuclear power island center, which has a reasonable design, a simple structure, good pressure regulation effect, and has the function of stabilizing flow. [0004] Technical scheme of the present invention: [0005] A nuclear power island core reheat steam main flow co...

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Problems solved by technology

[0002] In the past, the labyrinth valve core used in the reheat steam main flow control valve of nuclear power island center generally adopts fixed labyrinth discs, and the labyrinth structure composed of fixed labyrinth discs plays a role of decompression to a certain extent. But the effect is not good, and it does not have the effect of steady flow

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