Rubber seal desulfurization and denitrification knife gate valve

Abstract

A desulfurization and denitrification sluice valve sealed through rubber comprises a flash board. A valve body of the sluice valve comprises a main left valve body and a main right valve body, and a sealing device is arranged between the main left valve body and the main right valve body. The sealing device comprises a U-shaped sealing gasket which is located between the main left valve body and the main right valve body and provided with a skirt edge. An inward protrusion is arranged at the mouth of the U-shaped sealing gasket with the skirt edge. The protrusion is tightly matched with a transverse sealing strip of the mouth of the U-shaped sealing gasket with the skirt edge in an embedded mode. Meanwhile, push rods are arranged on the two sides of the valve body of the sluice valve, and after passing through a sealing sleeve, the front ends of the push rods make contact with the side edge of the U-shaped sealing gasket with the skirt edge. By means of the improvement and innovation on the sealing mode of a valve body structure, the U-shaped sealing gasket and the middle sealing strip, the defects of inward leakage and outward leakage of an existing sluice valve are thoroughly overcome.

Description

technical field [0001] The invention belongs to the technical field of valve manufacturing, and relates to a knife gate valve used in a device containing solid particles such as various powders, granules, slurry, and waste residues during flue gas desulfurization and denitrification in petrochemical and thermal power fields. Background technique [0002] In petrochemical and thermal power field flue gas desulfurization and denitrification, mining metallurgy, sewage treatment, papermaking and other pipelines containing powder, pulp, slurry, waste residue, particles, a large number of knife gate valve devices are used to control and transport pulp slag and pulp. At present, the disadvantages of common knife gate valves: 1. Common knife valves without bonnets are only used in the working conditions of conveying solid materials and coal-water slurry, sludge and paper pulp. leakage. [0003] 2. The contact area of ​​the long ring packing is large, and the bolts cannot be tighten...

AI Technical Summary

Problems solved by technology

At present, the disadvantages of common knife gate valves: 1. Common knife valves without bonnets are only used in the working conditions of conveying solid materials and coal-water slurry, sludge and paper pulp. leakage

[0003] 2. The contact area of ​​the long ring packing is large, and it cannot be evenly tightened when the bolt is tightened, and the medium leaks out.

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