Fluorine-lined ball valve with sealing piece protecting function

Abstract

The invention relates to a fluorine-lined ball valve with a sealing piece protecting function. The fluorine-lined ball valve comprises a valve body, a fluorine-lined ball body, a valve rod and a mainvalve seat. The valve body is internally provided with a flow channel; the valve rod controls the fluorine-lined ball body to make action so as to achieve cutting-off and communicating of the flow channel; the main valve seat is mounted at the flow channel and is in seal fit with the fluorine-lined ball body; the flow channel is provided with an inner communicating end communicating with a tank car and an outer communicating end communicating with the outside world; a fluorine lining is arranged on the inner wall of the flow channel; the fluorine-lined ball valve further comprises an particlematerial sealing piece and an operation piece which are arranged at the flow channel and located between the inner communicating end and the fluorine-lined ball body; the particle material sealing piece has a first communicating state and a second cutting-off state relative to the flow channel under control of the operation piece; and a positioning piece is arranged between the fluorine lining andthe main valve seat. By adopting the technical scheme, through the fluorine-lined ball valve with the sealing piece protecting function, the situation that a fluorine-lined open-close piece and the valve seat are damaged due to particle materials is avoided.

Description

technical field [0001] The invention relates to a fluorine-lined ball valve, in particular to a fluorine-lined ball valve with a seal protection function. Background technique [0002] The fluorine-lined ball valve adopts the lining process for all the places where the medium in the valve body can reach. The lining material is generally made of FEP (F46), PCTFE (F3), FPA and other fluoroplastics, which can be applied to various concentrations of sulfuric acid, hydrochloric acid, and hydrogen. Hydrofluoric acid, aqua regia and various organic acids, strong acids, strong oxidants and other corrosive particles, powders and other pipelines. [0003] The traditional fluorine-lined ball valve includes a valve body, a fluorine-lined ball, a valve stem and a valve seat. There is a flow channel in the valve body, and the valve stem controls the action of the fluorine-lined ball to cut off and connect the flow channel. The ball is sealed and fit. When the fluorine-lined ball valve is...

AI Technical Summary

Problems solved by technology

[0003] The traditional fluorine-lined ball valve includes a valve body, a fluorine-lined ball, a valve stem and a valve seat. There is a flow channel in the valve body, and the valve stem controls the action of the fluorine-lined ball to cut off and connect the flow channel. The ball is sealed and fit. When the fluorine-lined ball valve is installed on the entry and exit position of the tank truck transporting granular materials as its entry and exit control part, the granular material of the tanker often flows back to the fluorine-lined ball valve. During the process of cutting off the flow path by the fluorine-lined ball , the countercurrent granular material will adhere to the outer wall of the fluorine-lined ball, and this part of the granular material will cause friction between the fluorine-lined ball and the valve seat, causing the wear of the fluorine-lined opening and closing parts and the valve seat, reducing the sealing performance and service life

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