Device for shutting of pipelines for transport of bulk products
AssigneePaul Wurth S.A.
InventorsPierre Mailliet, Henri Radoux, Leon Ulveling, Jeannot Loutsch, Emile Lonardi
Life of this patent
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Abstract
The device comprises a housing with a circular passage orifice, a pivoting closing element in the form of a spherical dome and a circular gasket surrounding the said orifice and mounted on an annular support axially displacable towards the closing element under the action of a pneumatic fluid, the said annular support possessing for this purpose a passive annular surface exposed to the pressure in the said housing, the active surface of the support being larger than its passive surface.
Claims13
A device for shutting off pipelines for the transport of a pressurized stream of lignite dust or coal dust, comprising:
- a housing having a circular orifice;
- closing means for closing said orifice, said closing means comprising a spherical dome pivotably mounted within said housing and having a first position wherein the dome is disposed across the orifice, and an open position wherein the dome is pivotably displaced from the first position;
- means for pivoting said closing means;
- an annular receptable defined within said housing and surrounding said orifice;
- an annular support mounted around said orifice, a first portion of said annular support being slidably received within the annular receptacle and axially displaceable toward said closing means, said annular support including an inner radial surface, an outer radial surface, a first annular surface, said first annular surface being exposed to the product stream pressure, and a second annular surface, said second annular surface being larger than said first annular surface;
- an inner concertina compensator sealingly connecting said inner radial surface of the support and the receptacle;
- an outer concertina compensator sealingly connecting said outer radial surface of the support and the receptacle;
- first gasket means mounted on a second portion of said annular support, said second portion being disposed exteriorly of said annular receptacle, for contacting the closing means to seal the orifice;
- and
- pneumatic means for axially displacing said annular support by subjecting the second annular surface of the annular support to pressurized pneumatic fluid in order to apply the first gasket means on the closing means.
The device of claim 12, wherein a first pneumatic chamber, for applying pressurized fluid to the first surface of the piston, is defined between the outer gasket and the inner compensator, a second pneumatic chamber, for applying pressurized fluid to the second side of the piston, is defined between the outer gasket and the outer compensator and a third chamber, said third chamber being vented to the atmosphere, is formed between the inner gasket and the inner compensator.
Dependencies are inferred from the claim text.