| 摘要 |
An apparatus for preventing backward flow by freezing of a sewer of a multi-floor building is provided to minimize the freezing possibility and reduce the backflow of the waste water by installing the vibration generation device having plural grooves. An apparatus for preventing backward flow by freezing of a sewer of a multi-floor building is composed of a vibration-type connection pipe(150) mounted with plural projecting parts(151) at the outer peripheral surface; a vibration generating device(140) placed to cover the peripheral part of the connection pipe, wherein a striking rod(143) rotatably fixed through the medium of a spring(142) is projected at the inner peripheral surface, and the striking rod and the projecting part are contacted to have an engagement groove(141) incised along the upper and lower surfaces and plural grooves(144) formed along the outer peripheral surface; a first fixing pipe(110) formed with an engagement unit(114) rotatably extended and installed with a combining member(111); a second fixing pipe(120) formed with an engagement unit(124) rotatably extended and installed with a combining member(121) and a mounting groove(123); first and second bearings(131,132) placed between the engagement unit and the engagement groove to minimize the friction force of the first and second fixing pipes; and a driving unit(160) having a rotary shaft(161) rotated by the electric force and a main gear(162) equipped with protrusions(613) to transfer the power. |
