Novel ultrahigh-temperature fixed ball valve

Abstract

The invention discloses a novel ultrahigh-temperature fixed ball valve which comprises a valve bonnet. A liner tube is fixedly connected to the inner wall of the valve bonnet, a disc spring is fixedly connected to the outer wall of the liner tube, a sealing ring is fixedly connected to the outer wall of the disc spring, a valve seat is fixedly connected to the inner wall of the sealing ring, and a valve body is fixedly connected to the outer wall of the valve bonnet. A ball is arranged on the inner wall of the valve body, a stuffing box is fixedly connected to the outer wall of the top of the valve body, and a valve rod is arranged on the inner wall of the stuffing box. Multi-combination packing can effectively prevent packing leakage caused by abrasion, is resistant to high temperature, does not generate metal bonding at the high temperature, and has the characteristics of corrosion resistance and impact resistance,and the floating structure ensures that the ball is not jammed or stuck at the high temperature; and the disc spring is arranged between the liner tube and the valve seat, the disc spring is adopted in a compensation system, the rigidity coefficient of the mechanism can be improved, the influence of temperature on the performance is reduced, and the disc spring is more suitable for high-temperature work.

Description

technical field [0001] The invention belongs to the technical field of valves, and in particular relates to a novel ultra-high temperature fixed ball valve. Background technique [0002] Ball valve, the opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for the regulation and control of fluids, among which the hard-sealed V-shaped ball valve has a strong shear force between its V-shaped ball core and the metal valve seat of surfacing welding carbide, especially suitable for fibers, tiny solid particles, etc. medium. The multi-way ball valve can not only flexibly control the confluence, diversion and flow switching of the medium on the pipeline, but also close any channel and connect the other two channels. This type of valve should generally be installed horizontally in the pipeline. According to the driving mode, the ball valve is divided into: pneumatic ball valve, electric ball valve, manual ba...

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the extremely complicated working environment of the ball valve, it often works in high temperature, high pressure, hydrogen, high frequency, and high hardness adsorption media. These mixed media are easily adsorbed on the surface of the ball, which will make the ball valve Damage, damage to the valve seat, and even the hardened layer on the ball valve to fall off. Under high temperature and high pressure, the cemented carbide is prone to metal bonding and heat accumulation, resulting in strain on the sealing surface of the valve ball and valve seat, especially when the operating temperature reaches 450 degrees. , the fixed ball valve is very easy to get stuck, and the traditional floating ball cannot complete the two-way seal under the solid material. These situations lead to the phenomenon that the traditional ball valve is not resistant to high temperature environment and the ball valve cannot be cleaned in time after the ball valve is stuck to the medium, and it is easy to get stuck.

[0005] 2. Due to the simple design of the traditional ball valve and the slow flow rate, the efficiency is low

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