| 摘要 |
In a sparger outlet, openings in a sparger loop are provided with specially designed check valves to reduce or eliminate the tendency of the lading to enter the loop through the openings. The openings in the loop include a hollow cylindrical seat portion. The seat member includes an opening in the interior portion thereof which communicates with the loop. The external portion of the seat member includes a circular seat adapted to receive a check valve in closed position. The seat portion may be formed in the loop or be a separate member. The check valve includes a stem portion extending through the seat, a tail portion which engages the interior portion of the seat member, and a head portion which in closed position seats on the seat. Either the stem portion and/or the tail portion is made of elastomeric material. The tail portion includes outwardly extending legs which engage the interior portion of the seat and bias the head portion into seated position on the seat. When fluid is circulated through the loop, the legs and/or the stem deform under fluid pressure to allow the head portion to move off its seat and fluid to enter the outlet for agitation. When the fluid pressure is turned off, the legs return to their original position and in so doing cause the heat portion to return to its original seated position. When the head portion is in seated position, the lading is prevented from entering the loop.
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