| 摘要 |
<p>A bracelet-shaped filter device (10) moulded of plastics has a frame (16) surrounding a slotted filter portion (18) and integral retaining portions (26, 28) which permit it to be held tightly in contact wiht the surface of a pipe (12). The filter portion (18) contains a plurality of evenly spaced slots (22) which are positioned so as to be spaced at a predetermined distance from an aperture (14) in the pipe (12) through which fluid may pass. The filter slots (22) are V-shaped and of increasing width in a direction toward the centre of the pipe (12). In a preferred embodiment, the retaining portions are integral straps which can be tightened and held by an integral fastening means (26 min , 28 min ). In a modified structure (Figures 5, 6) which is suitable for small pipes, the device may include curved portions which are adapted to be spread apart and snapped over the sides of the tube. The devices are especially useful to prevent entry of the solid particles in a fluidized bed into the fluid supply conduit.</p> |
