Fluid flow measurement in large dia. pipe - utilises by=pass pipe with several measuring points across large pipe

摘要

The flow of fluid in large diameter pipes is determined by measuring flow in bypass pipe of small diameter. Accuracy of measurement is achieved by having several measuring points and integrating results. A flow sensor (10) comprises body (11) with parallel faces close together across large diameter pipe (12). A slot in the upstream face (17) extends to approximately the diameter of the pipe. An obstruction (18) separates flow into two paths which rejoin (19) adjacent to internal pipework (20). The partial flow passes via flow counter (15) to re-enter sensor via internal outlet pipework. Flow exhausts via an outlet orifice (24).