| 摘要 |
<p>PURPOSE: A sluice valve is provided to operate a stem using a small amount of power by installing a ball, which acts a rolling motion, in an annular support unit and to prevent noise and abrasion. CONSTITUTION: A sluice valve comprises a cover(20), a stem(30), an upper cover(40), and a valve disk. The cover is coupled to the top surface of a valve body and has a protrusion. The stem is coupled to the cover and is hung on the protrusion of the cover. The upper cover covers the top of the cover. The valve disk is vertically moved along the stem. An annular bottom lower groove(21a) is formed on the top surface of the protrusion, and an annular bottom upper groove is formed on the bottom surface of the protrusion. A bottom moving path is formed by coupling the bottom lower groove and the bottom upper groove. Multiple balls(60) are inserted into the bottom moving path.</p> |
