Corrugated pipe washing-free valve

Abstract

The invention discloses a corrugated pipe washing-free valve, and relates to the technical field of valves. The corrugated pipe washing-free valve comprises a valve body assembly, a sealing assembly and an execution assembly; the valve body assembly comprises a valve body, a valve deck, a valve clack and a first valve rod; the valve body is provided with a first cavity, a second cavity, a first opening, a second opening and a third opening, the first opening of the valve body is fixedly connected with the valve deck, the valve clack is located in the first cavity and connected with one end of the first valve rod, the other end of the first valve rod extends out of the valve deck, the second opening is in communication with a pipeline, the third opening is in communication with the pipeline, and the first cavity is in communication with the second cavity; and the sealing assembly comprises a corrugated pipe, a filler assembly and a base. The invention has the technical effect that the corrugated pipe is not contacted with a medium, so that the corrugated pipe is prevented from being frequently scoured by the medium.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a bellows flush-free valve. Background technique [0002] Related bellows valves generally adopt an exposed bellows structure. The medium will continuously wash the bellows during the flow process. The bellows will be completely deformed and unstable under the force of the medium, which greatly affects the use of the bellows. life. [0003] The lower end of the related bellows valve is fixed on the lower valve stem. When the lower valve stem moves up and down, due to the erosion of the bellows by the medium, the lower valve stem will generate a bending moment during the opening or closing process, which will cause the bellows to break down. Torsion, the bellows are subjected to frequent torque moments, causing the bellows to fail, so that the seal cannot be achieved. [0004] Chinese utility model patent, publication number: CN201103694Y, announcement date: 2008.08.20; discloses...

AI Technical Summary

Problems solved by technology

[0002] Related bellows valves generally adopt an exposed bellows structure. The medium will continuously wash the bellows during the flow process. The bellows will be completely deformed and unstable under the force of the medium, which greatly affects the use of the bellows. life

[0003] The lower end of the related bellows valve is fixed on the lower valve stem. When the lower valve stem moves up and down, due to the erosion of the bellows by the medium, the lower valve stem will generate a bending moment during the opening or closing process, which will cause the bellows to break down. Torsion, the bellows are subject to frequent torque moments, causing the bellows to fail, making it impossible to seal

[0004] Chinese utility model patent, publication number: CN201103694Y, announcement date: 2008.08.20; discloses a bellows special valve for dangerous media, the sealing surface of the valve disc and the valve body is processed with an annular dovetail groove, and the dovetail groove is formed by isobaric pressure. The PTFE sealing ring ensures the sealing performance, but the disadvantage is that the bellows will be washed by the medium, reducing the service life of the bellows

[0005] Chinese utility model patent, publication number: CN210318559U, announcement date: 2020.04.14; discloses a bellows-sealed valve in which the bellows bears internal pressure, and the inner cavity of the bellows communicates with the inner cavity of the valve, and the inner cavity of the bellows and the inner cavity of the valve Separation, the peaks outside the bellows will not be crushed by the medium pressure, the disadvantage is that the inner cavity of the bellows is washed by the medium, causing the bellows to twist, reducing the service life of the bellows

Images