Double-scraper toroidal valve core and ball valve

Abstract

The invention discloses a double-scraper toroidal valve core. The double-scraper toroidal valve core comprises a ball core body, a fully open seal ring, a fully closed seal ring and supporting shafts,the ball core body has a penetrating material channel, each of the fully open seal ring and the fully closed seal ring is externally convex to the surface of the ball core body, the fully open seal ring is arranged at the channel port and the channel port is arranged in the fully open seal ring, the axis of the fully closed seal ring is perpendicular and intersect the axis of the fully open sealring, the fully closed seal ring is arranged to be a partition surface, the sealing surface of the fully open seal ring and the sealing surface of the fully closed seal ring are arranged on the same spherical surface, each of the outer wall surface of the full open seal ring, the inner wall surface of the fully open seal ring, the outer wall surface of the fully closed seal ring and the inner wallsurface of the fully closed seal ring takes the spherical surface and a spherical center as the truncated conical surface of a vertex, the two opposite sides of the ball core body are provided with the supporting shafts, and one supporting shaft is provided with a valve rod connecting groove. The invention further discloses a ball valve adopting the double-scraper toroidal valve core, the double-scraper toroidal valve core and the ball valve are long in service life.

Description

Technical field [0001] The invention relates to the field of valves, in particular to a double scraper annular valve core and a ball valve. Background technique [0002] Petroleum, chemical, electric power, metallurgy, building materials and other industrial fields used to transport liquid, gas and solid mixed media pipelines usually need to use valves to adjust and shut off, a ball valve is a kind of commonly used valves. [0003] Such as figure 1 , figure 2 As shown in the existing ball valve, the ball core body 1 is provided with a material channel 2 for material circulation. The material channel 2 penetrates through opposite sides of the ball core body 1 and forms a passage opening. The ball core body 1 is installed in the valve body 3. The opposite ends of the valve body 3 are provided with valve seats 4 adapted to the ball core body 1, and the valve seats 4 at both ends have valve seat passages, which are respectively the upstream valve seat passage 41 and the downstream val...

AI Technical Summary

Problems solved by technology

[0004] When the core body 1 rotates, the materials adhering to the sealing surface of the core body 1 and the valve seat sealing surface 43 are easy to scratch the sealing surface of the ball core body 1 and the valve seat sealing surface 43, and will leak when the valve is closed. Even the small opening phenomenon occurs, the phenomenon of small opening takes a long time to wash, and the wear is serious; when the valve is at a small opening (that is, when the ball valve is just opened or is about to close), the flow area of ​​the material is small, and the material flow rate is large at this time, and the high-speed flow The material scours the valve seat 4 and the ball core body 1 severely, and the above two situations will seriously affect the service life of the ball valve

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