Wear-resistant high-temperature-resistant metal rigid seal ball valve

Abstract

The invention discloses a wear-resistant high-temperature-resistant metal rigid seal ball valve, comprising a main valve body, an auxiliary valve body, a valve seat, a ball, a valve stem, a stuffing box, a coupling, a support and a positioning block; the inlet end of the valve seat is arranged at the inner wall of the main valve body, a first disc spring is arranged between the inlet end of the valve seat and an adjacent plane of the main valve body, a second disc spring is arranged between the outlet end of the valve seat and the adjacent plane of the auxiliary valve body, a passage port of the ball is provided with asymmetric arc notches, and an antifriction pad is arranged between the valve stem and the main valve body. The wear-resistant high-temperature-resistant metal rigid seal ball valve is long in service life, good in airtightness, and resistant to scour, wear, and high temperature and high pressure.

Description

technical field [0001] The invention relates to the field of ball valves, in particular to a wear-resistant and high-temperature resistant metal hard-sealed ball valve. Background technique [0002] With the rapid development of the petrochemical industry, petrochemical equipment continues to develop in the direction of high parameters and large-scale, so strict requirements are put forward for valves, such as: high temperature resistance, wear resistance, heat cycle resistance, low torque and zero leakage, etc. , effectively promoting the necessity of the development of wear-resistant and high-temperature-resistant ball valves; high-temperature gas-solid (such as adsorbents), high-temperature gas-liquid-solid (such as coal chemical industry) and other harsh multi-phase flow conditions require a large number of wear-resistant and high-temperature resistant ball valves ball valve. [0003] But the current ball valve has three problems: [0004] First, the coating hardness o...

AI Technical Summary

Problems solved by technology

[0004] First, the coating hardness of the sealing surface is low, and the wear resistance of the sealing surface is poor;

[0005] The second is that the valve stem material has poor high temperature resistance. Under the harsh working conditions of high temperature multiphase flow, the valve stem is easily deformed or even broken when the valve is opened and closed at high frequency;

[0006] The third is to adopt the conventional ball design. When the valve is initially opened and finally closed, the fluid with high flow rate and high hardness will easily cause the wear of the ball and the valve seat.

Images