A valve gate button is disclosed comprising a contacting face for sealing a port of a valve seat, wherein the contacting face is flat and has a substantially straight flow control edge. A valve gate is disclosed, comprising the valve gate button. A valve is disclosed comprising the valve gate button
A valve gate button is disclosed comprising a contacting face for sealing a port of a valve seat, wherein the contacting face is flat and has a substantially straight flow control edge. A valve gate is disclosed, comprising the valve gate button. A valve is disclosed comprising the valve gate button or valve gate.
대표청구항▼
1. A valve gate comprising a gate body and at least two gate buttons, each gate button comprising a contacting face configured for sealing a respective port of a valve seat, wherein the contacting face of each gate button is flat, and wherein each gate button has an outer periphery with a substantia
1. A valve gate comprising a gate body and at least two gate buttons, each gate button comprising a contacting face configured for sealing a respective port of a valve seat, wherein the contacting face of each gate button is flat, and wherein each gate button has an outer periphery with a substantially straight flow control edge in the form of a chord, the gate button comprising a circular cross section with the circular segment created by the chord removed, the gate body having an axis, the gate body being configured to retain the gate buttons in sealing contact with the valve seat and to move the gate buttons through respective arcuate paths, the gate body being movable between a closed position in which the gate buttons fully overlie the respective ports and an open position displaced from the closed position by rotation of the gate body about the axis, the valve gate further comprising a guide having pockets, the pockets being defined within the gate body and the gate buttons being located within the pockets, the pockets each having a cross-sectional shape substantially matching that of the gate buttons. 2. The valve gate according to claim 1, wherein the contacting face is of substantially segment shaped form. 3. The valve gate according to claim 1, wherein the chord has a length approximately equal to the radius of the base circle. 4. The valve gate according to claim 1, wherein each of the gate buttons comprise tungsten carbide. 5. The valve gate according to claim 1, wherein each of the gate buttons further comprise a retaining portion, rearward of the contacting face, for co-operating with a corresponding recess of a valve gate body to retain the gate buttons in position. 6. The valve gate according to claim 5, wherein the retaining portion is a substantially cylindrical portion that extends rearward of the contacting face. 7. The valve gate according to claim 5, wherein the retaining portion comprises a guide for maintaining the rotational orientation of the gate buttons about the axis of the base circle. 8. The valve gate according to claim 5, wherein the retaining portion comprises a spring recess for receiving a spring element. 9. The valve gate of claim 1, wherein the gate body comprises at least one flow passage for allowing communication of fluid through the gate body when the valve gate is in a valve and is in the open position. 10. The valve gate of claim 9, wherein the flow passage is of substantially segment shape at one end and is of lozenge shape at the other end thereof. 11. A gate valve comprising a valve seat and a valve gate, wherein the valve seat comprises at least two ports, and the valve gate comprises at least two gate buttons, each of the gate buttons corresponding with a respective one of the ports, wherein each of the gate buttons comprises a contacting face for sealing the corresponding port in use, wherein the contacting face is flat and each of the gate buttons has an outer periphery with a substantially straight flow control edge in the form of a chord, the gate button comprising a circular cross section with the circular segment created by the chord removed, wherein the gate body is configured to retain the gate buttons in sealing contact with the valve seat and to move the gate buttons through a respective arcuate path, the gate body being movable between a closed position in which the gate buttons fully overlie the corresponding ports and an open position displaced from the closed position by rotation of the gate body about an axis thereof, the valve gate further comprising a guide having pockets defined within the gate body, the gate buttons being located within respective ones of the pockets, wherein the cross-sectional shapes of the pockets substantially matches that of the gate buttons. 12. A valve gate comprising a gate body and at least two gate buttons, the gate body having an axis, each gate button comprising a contacting face configured for sealing a respective port of a valve seat, wherein the contacting face of each gate button is flat, and wherein each gate button has an outer periphery with a substantially straight flow control edge, the flow control edge straight with respect to an axis perpendicular to the axis, the gate body being configured to retain the gate buttons in sealing contact with the valve seat and to move the gate buttons through respective arcuate paths, the gate body being movable between a closed position in which the gate buttons fully overlie the respective ports and an open position displaced from the closed position by rotation of the gate body about the axis, the valve gate further comprising a guide having pockets, the pockets being defined within the gate body and the gate buttons being located within the pockets, the pockets each having a cross-sectional shape substantially matching that of the gate buttons, wherein the contacting face is shaped to define the substantially straight flow control edge, a substantially straight trailing edge, and a curved peripheral edge interconnecting the flow control edge and the trailing edge. 13. The valve gate according to claim 12, wherein the curved peripheral edge is of substantially part circular shape. 14. The valve gate according to claim 12, wherein each of the gate buttons comprise tungsten carbide. 15. The valve gate according to claim 12, wherein each of the gate buttons further comprise a retaining portion, rearward of the contacting face, for co-operating with a corresponding recess of a valve gate body to retain the gate buttons in position. 16. The valve gate according to claim 15, wherein the retaining portion is a substantially cylindrical portion that extends rearward of the contacting face. 17. The valve gate according to claim 15, wherein the retaining portion comprises a guide for maintaining the rotational orientation of the gate buttons about the axis of the base circle. 18. The valve gate according to claim 15, wherein the retaining portion comprises a spring recess for receiving a spring element. 19. The valve gate of claim 12, wherein the gate body comprises at least one flow passage for allowing communication of fluid through the gate body when the valve gate is in a valve and is in the open position. 20. The valve gate of claim 19, wherein the flow passage is of substantially segment shape at one end and is of lozenge shape at the other end thereof.
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이 특허에 인용된 특허 (6)
Clerc Daniel (Le Perreux FRX), Ceramic discs for taps and taps equipped with such discs.
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