| 摘要 |
An adjustable pipe bend (10) comprises two half portions (11, 12) each provided with an annular flange (13) which in turn provide circular mating surfaces having a centre at the intersection of the axes (14, 15) and at an angle thereto. The portions (11, 12) can be rotated about the plane of the mating surfaces to provide the desired bend. Portion (11) includes a frusto-conical or cylindrical throat (16) which terminates in a curved portion (17) which forms part of an imaginary sphere (18), and is further joined to the flange (13) by an arcuate portion (19) which also extends as a tangent to the sphere. The longitudinal axis of the throat portion does not extend radially from the centre of the sphere (i.e. is angularly offset from the axis (14)) thus enabling the diameter of the sphere to more closely approach the diameter of the pipe run in which it is located whereby a change in direction of flow through the bend is achieved with minimal disturbance to the flow. Portions (11, 12) need not be identical as shown. |
