摘要 |
<p>A flow-limiting device for a pipe carrying a fluid or gaseous medium, comprising a flap, means mounting the flap in the pipe for pivotal movement in a manner to vary the cross-sectional area of flow through the pipe, and spring means urging the flap in a direction to increase the cross-sectional area of flow and against the direction of flow through the pipe, so that the flap varies the cross sectional area of flow through the pipe in dependence on the kinetic energy differential of the medium upstream and downstream of the flap. The spring means comprises a leaf spring one end of which is mounted in an upper part of a housing for insertion in the pipe and the other end of which carries the flap. There is a clearance beneath the lower edge of the flap to permit the passage of the deposits in the medium past the flap in all positions thereof.</p> |