Powder sealing valve

Abstract

The invention discloses a powder sealing valve comprising a valve body, a sweeping mechanism, a valve core and an executing mechanism; the valve core is arranged in the valve body to open and close the valve under the effect of the executing mechanism; the sweeping mechanism is an annular gas chamber; the annular gas chamber is also arranged in the valve body; the valve core is in sealed contact with the gas chamber; the sealing surfaces of the valve core and the gas chamber are both spherical surfaces; the annular gas chamber is provided with a gas inlet and a gas outlet; and the gas outlet is arranged on the sealing surfaces of the gas chamber and the valve core. In the invention, the annular gas chamber is arranged in the valve body, the gas inlet is arranged outside the gas chamber, the gas outlet is arranged on the sealing surfaces of the interior of the gas chamber and the valve core, and dry gas (compressed gases of air and nitrogen can be selected according to conditions for use) is injected between the sealing surfaces to keep the sealing surfaces clean by means of the sweeping of gas flow, thereby solving the problem of material sticking, realizing reliable sealing and achieving zero leakage.

Description

Technical field: [0001] The invention relates to a sealing device for powdery solid materials, in particular to a powder sealing valve. Background technique: [0002] Powder is a general term for powdery solids, and powder involves almost all light and heavy industrial production and manufacturing fields; the production, processing and application level of powder has become a measure of a country's scientific and technological level. In the process of its manufacture and application, the sealing of powder is an important link, especially for highly toxic, flammable and explosive powders, effective prevention of leakage is the key to restricting the development of the industry related to environmental protection, safety, occupational health, etc. The powder sealing valves used in actual production are all selected according to the liquid sealing form. During use, the powder will be adsorbed on the sealing surface, causing the seal to fail and leak; and the powder valves produ...

AI Technical Summary

Problems solved by technology

The powder sealing valves used in actual production are all selected according to the liquid sealing form. During use, the powder will be adsorbed on the sealing surface, causing the seal to fail and leak; and the powder valves produced by professional powder valve manufacturers , can only be used in normal pressure or places where a small amount of leakage is allowed

In the process of powder manufacturing and processing under high positive pressure or vacuum state, to meet the requirement of no leakage, at present, blind plates can only be used for sealing, and the bolts must be manually disassembled to open or close, which requires a large amount of labor and has potential safety hazards

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