STRAIGHT-STROKE NO-MATERIAL-LOSS HIGH-TEMPERATURE NORMAL-PRESSURE FILLER SEALING STRUCTURE

WIPO Patent Application WO/2022/083285

A1

A straight-stroke no-material-loss high-temperature normal-pressure filler sealing structure, comprising an upper valve cover (1), which has an accommodating cavity; a valve stem (2), which passes through the accommodating cavity of the upper valve cover (1); a filler component (3), which is located in the accommodating cavity and is sleeved on the valve stem (2); a filler gland (4), which is sleeved on the valve stem (2), and the bottom part of which is inserted into an opening of the accommodating cavity; the filler component (3) comprises a first scraper ring (5), a first primary-secondary filler (6), a support ring (7), a second primary-secondary filler (8), and a second scraper ring (9) which are sleeved on the valve stem (2) in succession; the first and second scraper rings (5, 9) are arranged symmetrically. The first scraper ring (5) comprises metal scrapers (10) that are in an up-down arrangement, and a graphite sealing ring (11) located between the two; the bottom part of an inner ring of the lower metal scraper (10) is provided with an arc angle, and the bottom part of the inner ring of said metal scraper (10) is provided with an annular material storage groove (13).

MA YU SHAN (CN)
SU HAI XIA (CN)
CHANG ZHAN DONG (CN)
FENG ZHI YUN (CN)
HOU RUN HAI (CN)

PCT/CN2021/115022

April 28, 2022

August 27, 2021

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WUZHONG INSTR CO LTD (CN)

F16K41/02; F16K27/08

CN112283440A	2021-01-29
CN209245441U	2019-08-13
CN205207888U	2016-05-04
CN206338433U	2017-07-18
CN206299890U	2017-07-04
JP2017215007A	2017-12-07
CN203115279U	2013-08-07

CHANGZHOU INNOVATION PATENT AGENCY (CN)

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