The utility model is simple in structure, convenient in using, the steaming frame height can be adjusted to use by rotating the screw or the nut.
本实用新型结构简单，使用方便，使用时只要旋转螺杆或螺帽即可调节蒸架的不同高度。
It is mainly made up of frame, gate board, screw pole, nut etc. Rotate the handwheel by hand, then the screw pole drives the nut gate board move in horizontal to fro to open close the valve.
主要由框架、闸板、丝杆、螺母等零件构成，用手转动手轮使丝杆带着丝杆螺母和闸板沿水平方向往复运动，达到闸门的启闭目的。
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