Rubber lining gate valve

Abstract

The invention relates to a rubber lining gate valve. The rubber lining gate valve comprises a valve body, a gate plate, a valve rod, a bracket and a hand wheel. The valve body is mainly formed by connecting a left valve body part and a right valve body part which are of a symmetric structure through bolts, wearproof rubber layers are integrally vulcanized on a channel of the left valve body part,a channel of the right valve body part and an end surface of a flange, U-shaped steps are arranged at channel ports of opposite end surfaces of the left valve body part and right valve body part respectively, a U-shaped sealing base is mounted in a U-shaped sealing groove formed by connecting the U-shaped steps on the two sides, and the U-shaped sealing base and the U-shaped outer end face of thegate plate are matched with each other to form a sealing pair. Transverse sealing grooves are respectively formed in the end faces of the left valve body part and right valve body part at the upper end of the U-shaped sealing groove respectively, rubber sealing strips which are in sealing fit with the planes of the two sides of the gate plate are mounted in the transverse sealing grooves in the two sides respectively, and transverse metal scraping blades which are in contact with the planes of the two sides of the gate plate are embedded in the rubber sealing strips. The machining precision ofthe valve body is high, and the valve body has the advantages of great erosion resistance, good wearing resistance, excellent corrosion resistance, superior sealing performance and the like and is applicable to a control valve of a pipeline containing abrasive and corrosive slurry.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a gate valve. The invention is suitable for the control valve of pipelines with abrasion and corrosive slurry medium. Background technique [0002] Ordinary gate valves are generally composed of a valve body, a valve seat, a gate, and a valve stem. The valve seat is installed at the inlet and outlet passages of the valve body. Both sides of the gate and the valve seat cooperate with each other to seal. Its main disadvantage is that the medium has great scouring wear and corrosion on the valve body and valve seat, and the slurry medium is easy to deposit in the valve cavity, which affects the inability of the gate to close properly, and the slurry is easy to adhere to the sealing surfaces on both sides of the gate. , wear the sealing surface of the cavity packing and the valve seat, and affect the sealing performance. Contents of the invention [0003] The purpose of the present inventio...

AI Technical Summary

Problems solved by technology

Its main disadvantage is that the medium has great scouring wear and corrosion on the valve body and valve seat, and the slurry medium is easy to deposit in the valve cavity, which affects the improper closing of the gate, and the slurry is easy to adhere to the sealing surfaces on both sides of the gate. , which will cause wear to the packing seal of the middle cavity and the sealing surface of the valve seat, affecting the sealing performance

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