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公开(公告)号：WO2020008443A3
公开(公告)日：2020-01-09
申请号：PCT/IB2019/055810
申请日：2019-07-08
Applicant: FLSMIDTH A/S
Inventor： WALKER, Mathew , APPADURAI, Arun , KARUMBAYIRAM, Saminathan , SOK, Thien , YANG, Yihong
Abstract: Disclosed, is a valve apparatus for use with flotation cells. The valve apparatus is characterized in that it comprises a nozzle tube (202) for attaching to the wall (110) adjacent the orifice (102). The nozzle tube (202) is provided between the orifice (102) and the dart (100) and configured such that while in use, the dart (100) does not come into direct contact with the orifice (102) provided to the wall (100). The nozzle tube (202) further comprises an inwardly-tapered inlet (204) which extends from a wider open end to a throat (206) of smaller diameter. By virtue of the shape of the upstream-facing surface (112) of the dart (100) and the inwardly-tapered inlet (204), a nozzle structure is formed as the dart (100) moves upstream or closer to the throat (206) of the nozzle tube (202). This nozzle structure is particularly adapted for reducing head losses.
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公开(公告)号：WO2020008443A2
公开(公告)日：2020-01-09
申请号：PCT/IB2019/055810
申请日：2019-07-08
Applicant: FLSMIDTH A/S
Inventor： WALKER, Mathew , APPADURAI, Arun , KARUMBAYIRAM, Saminathan , SOK, Thien , YANG, Yihong
Abstract: Disclosed, is a valve apparatus for use with flotation cells. The valve apparatus is characterized in that it comprises a nozzle tube (202) for attaching to the wall (110) adjacent the orifice (102). The nozzle tube (202) is provided between the orifice (102) and the dart (100) and configured such that while in use, the dart (100) does not come into direct contact with the orifice (102) provided to the wall (100). The nozzle tube (202) further comprises an inwardly-tapered inlet (204) which extends from a wider open end to a throat (206) of smaller diameter. By virtue of the shape of the upstream-facing surface (112) of the dart (100) and the inwardly-tapered inlet (204), a nozzle structure is formed as the dart (100) moves upstream or closer to the throat (206) of the nozzle tube (202). This nozzle structure is particularly adapted for reducing head losses.
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