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2. 发明专利

JPH0617943A SLIDE SEALING DEVICE 失效
公开(公告)号：JPH0617943A
公开(公告)日：1994-01-25
申请号：JP19749592
申请日：1992-07-02
申请人： AZUMA TEKKO KK
发明人： SHIMADA KAZUMI
IPC分类号： F16K1/18 , F16K1/00 , F16K1/20 , F16K13/00 , F16K27/02
摘要： PURPOSE:To protect a sealing surface from high temperature when a fluid circulates in a slide sealing device of a valve chamber through which the fluid containing dust such as grains of high-temperature iron ore passes by providing a slide pipe which can connect a fluid conduit opening and a discharge pipe opening to each other within the valve chamber. CONSTITUTION:A hermetic valve chamber 11 is divided by a center partition wall 13 into two parts and a first valve element 12 is disposed in a center opening formed in the partition wall 13 while the valve element 12 is allowed to freely open and close the opening. A conduit 14 for guiding fluids and a discharge pipe 16 for discharging the fluids from the valve chamber 11 are connected to the respective portions of the valve chamber 11 and a second and third valve element 15, 17 are disposed in the respective openings of the conduit 14 and the discharge pipe 16 in such a manner as to freely open and close the openings. An auxiliary chamber 20 through which the conduit 14 passes is connected to the valve chamber 11 and a slide pipe 18 is provided to enclose the conduit 14 within the auxiliary chamber 20. To allow passage of high-temperature fluids, each of the valve elements 12, 15, 17 is opened and then a drive mechanism 19 causes the slide pipe 18 to protrude into the valve chamber 11 and the conduit 14 and the discharge pipe 16 are directly connected to each other by the slide pipe 18 so as to prevent deterioration of valve seats 15a, 12a, 17a that could be caused by heat.

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