Full-manual dual-seal butterfly valve of movable sealing device independent of valve body

Abstract

The invention discloses a full-manual dual-seal butterfly valve of a movable sealing device independent of a valve body. The full-manual dual-seal butterfly valve comprises a movable sealing ring, the valve body and a valve plate, wherein the movable sealing ring is arranged on a screw rod, and is connected with a butterfly valve upstream connecting pipe through the screw rod; an adjusting nut capable of manually mounting and manually relieving the movable sealing ring is arranged on the screw rod; the movable sealing ring is connected with the valve body through a flange bolt. According to the full-manual dual-seal butterfly valve of the movable sealing device independent of the valve body, the overhauling sealing device is independent of the butterfly valve body, so that free valving and disassembly transportation of the butterfly valve body can be realized, meanwhile, when the sealing of the butterfly valve is damaged or aged and needs to be overhauled and replaced, the adjusting nut on the screw rod is manually operated through operating the movable sealing ring, so the inputting and the relieving of the overhauling sealing ring are realized; a locking function of the overhauling sealing ring is realized, the overhauling sealing ring of the butterfly valve is reliable to act, and the overhauling work of work sealing is safer.

Description

technical field [0001] The invention relates to a butterfly valve, in particular to a fully manual double-sealed butterfly valve in which the mobile sealing device of a water turbine inlet butterfly valve and a pressure steel pipe protection valve is independent of a valve body. Background technique [0002] Due to the designed water head of the double-sealed butterfly valve is not high enough to use its own pipeline water pressure to drive the sealing ring for inspection and maintenance of the butterfly valve, it is necessary to provide pressure water source for the input and maintenance of the sealing ring by adding filtering devices, operating valves and booster pumps, etc. Pull out to provide power. [0003] Due to the limitation of transportation size or transportation weight conditions (such as highways, tunnels, bridges, etc.), the large-diameter butterfly valves need to be transported in the form of disintegration or split flaps. The rigidity of the device cannot be...

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of transportation size or transportation weight conditions (such as highways, tunnels, bridges, etc.), large-diameter butterfly valves need to be transported in a dismantled or split-flap manner. The rigidity of the device cannot be guaranteed after the butterfly valve is disassembled, which makes it very difficult to assemble the butterfly valve after it is transported to the construction site, and the sealing performance of the assembled product cannot be effectively guaranteed.

May cause irreparable economic loss while wasting cost

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