河北快三走势图

   稻田塑料闸门 灌溉塑料田口闸门，其包括圆筒形主体、固定主板、导流罩和闸门板，其特征在于，圆筒形主体由上下两个半圆形组件组合而成，圆筒形主体一端设有导流罩，圆筒形主体另一端设有固定主板;固定主板上设有与圆筒形主体相匹配的圆孔，在圆孔两侧的固定主板上均竖直设有一个尼龙压条，在两个尼龙压条相对的侧壁上均设有滑槽，在每个滑槽顶端设有限位台;滑槽内设有上下滑动位移的闸门板，闸门板底端设有与限位台对应的卡台，闸门板上设有限位孔。本实用新型的优点：结构简单，使用方便;重量轻、便于安装、成本低廉;具有限位和防盗的功能。

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