公开(公告)号：WO2004106784A1

公开(公告)日：2004-12-09

申请号：PCT/CA2004/000821

申请日：2004-06-02

Applicant: VELAN INC. ,  ISBITSKY, Alexander Stanley

Inventor： ISBITSKY, Alexander Stanley

IPC: F16K3/12

CPC classification number: F16K3/12

Abstract: A flexible wedge (10) for a gate valve, linearly displaceable within a valve body between an open position and a closed position, comprises a pair of pressure retaining plates (12) and a central wedge body (13) therebetween. The pressure retaining plates have inclined seating surfaces (14) on opposed outer faces thereof for mating with corresponding valve seats within the valve body to prevent substance flow therethrough when the gate valve wedge is in the closed position. The central wedge body is disposed between, and integrally links, the pressure retaining plates. The central wedge body defines at least two offset slots (30) extending partially into the central wedge body from opposed edges thereof and which overlap in a depth-wise direction to define a deflectable web portion between the offset slots. The deflectable web portion permits flexibility of the gate valve wedge, while limiting stress and deformation of the seating surfaces on the pressure retaining plates.

Abstract translation: 用于闸阀的柔性楔形件（10）在阀体内在打开位置和关闭位置之间可直线位移，包括一对压力保持板（12）和中间楔形体（13）。 压力保持板在其相对的外表面上具有倾斜的座表面（14），用于与阀体内的相应阀座配合，以防止当闸阀楔块处于关闭位置时物质流过。 中央楔体设置在压力保持板之间并且一体地连接在压力保持板上。 中心楔体限定了至少两个偏移槽（30），该偏移槽（30）从其相对的边缘部分地延伸到中心楔体中，并且在深度方向上重叠以在偏移槽之间限定可偏转的腹板部分。 可偏转腹板部分允许闸阀楔的柔性，同时限制压力保持板上的就座表面的应力和变形。