Automatic decoking multi-layer sealing discharging ball valve with double scrapers

Abstract

The invention relates to an automatic decoking multi-layer sealing discharging ball valve with double scrapers. The automatic decoking multi-layer sealing discharging ball valve comprises a valve body, a valve seat, a ball body, a valve rod and a transmission mechanism, wherein the valve seat is a combined valve seat composed of an inner valve seat body, a middle valve seat body and an outer valve seat body which float independently; abrasion compensation of the three valve seat bodies does not interfere with one another, and after any one of the three valve seat bodies is abraded, independent automatic compensation can be conducted, so that the combined valve seat and the ball body form three independent sealing pairs which do not interfere with one another, and the sealing reliability is improved; the inner scraper composed of the multiple small scrapers is arranged on the inner side of a sealing ring of the inner valve seat body, and the outer scraper composed of the multiple small scrapers is arranged on the outer side of a sealing ring of the outer valve seat body; and when the ball body rotates, surface coking objects are reliably removed, and the situation that the coking objects are accumulated between the scrapers and the surface of the ball body and extruded, and consequently the surface of the ball body is abraded is prevented. The automatic decoking multi-layer sealing discharging ball valve has the beneficial effects of being reliable in sealing performance, long in service life and the like.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a ball valve. The invention is applicable to a discharge device for loading and unloading powdery materials, granular materials and coking-prone materials in the fields of environmental protection, metallurgy, coal, mining, chemical industry, food and the like. Background technique [0002] The unloading valve is mainly used as a control valve for discharging medium at the outlet of the silo and storage tank. The types of unloading valves mainly include flap unloading valves, slide plate unloading valves, star unloading valves, and spherical unloading valves. The main disadvantage of the flap unloading valve, slide unloading valve and star unloading valve is poor sealing performance, which is generally only suitable for the working conditions of powdery materials and granular materials with low sealing requirements in coal, mining and other industries; The main disadvantages of the spheri...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an automatic decoking device with double scrapers with good sealing performance and long service life, aiming at the disadvantages that the valve seat and ball sealing surface of the existing spherical discharge valve are easy to wear, the sealing performance is poor, and the service life is short. Multi-level seal unloading ball valve

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