Introduction of expansion and contraction light gate valve

Expansion and contraction light gate valve is a novel double gate plate gate valve, the valve body uses a new symmetrical flat structure, the top seal with mechanical expansion and contraction seal mechanism, with light weight, reliable seal, gate valve Sealing surface wear small, long service life and opening and closing resistance moment and so on. The body of the expansion-contraction light weight gate valve is a space shell structure, which has a special shape and a complicated structure. The calculation of the strength without an appropriate theoretical analytical formula can only be solved by the numerical method. Using finite element method to calculate the stress distribution of the valve body and displacement, and then check the strength of the valve body. The valve body model is built according to the actual size. At the same time, in order to simplify the model and increase the calculation speed, small chamfer and groove are omitted in the model. Check the strength of the valve body, take the valve strength test pressure as the working conditions. Displacement boundary dimension is the valve body on both sides of the outer surface of the valve and the valve outer surface of the valve outer end of the fixed surface, limiting its movement. Force boundary conditions are to apply a uniform pressure inside the valve p = 214MPa (valve working pressure of 116MPa). Expansion and contraction of light valve will be common gate valve body and bonnet together, while the common gate valve seat and valve interface as a whole, the unique structural design, the design of the ball top mechanical expansion and contraction seal body, with a sealed and reliable , Gate valve sealing surface wear small, long service life and opening and closing resistance moment and so on. The valve has carried out a number of tests such as shell strength test, two-way liquid seal test, two-way gas seal test, 6,000 static pressure life test, high and low temperature environmental adaptability test, the test results show that the valve performance is superior.