VARIABLE-RANGE VALVE LEAKAGE DETECTION DEVICE

WIPO Patent Application WO/2023/216364

A1

A variable-range valve leakage detection device comprises a leakage detection pipeline (6), the leakage detection pipeline (6) comprising an expandable section (24), a variable-diameter pipeline (23), an outer wall portion and a supporting pipeline (19). The expandable section (24) comprises a flexible cloth (242) and a movable metal plate (241). The metal plate (241) is wrapped inside the flexible cloth (242) to ensure that a gas entering the variable-diameter pipeline (23) is not leaked. The variable-diameter pipeline (23) comprises an upper support (32), a lower support (33) and a movable blade (34). A round pin protrudes from the upper support (32) plate to drive the movable blade (34) to move. The lower support (33) plate is provided with a square groove to enable the movable blade (34) to rotate around the lower support (33) plate. The same detection device can detect leakages having variable leakage amounts and containing different gases. When the leaked medium has a lower flow amount and flow rate than the lower limit detectable by a measurement instrument, it is difficult for metering devices such as anemometers to detect the leaked medium. According to the present invention, the flow area is reduced to increase the flow rate, thereby measuring tiny amounts of leakages accurately.

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LI BEIBEI (CN)
LIU XIUMEI (CN)
WU SU (CN)
WEI JIANQIU (CN)
ZHAO QIAO (CN)
HE JIE (CN)
LI WEI (CN)
LIU LILI (CN)
YANG AOWEI (CN)
SHEN YONGXUN (CN)
LIU MINGXING (CN)

PCT/CN2022/099457

November 16, 2023

June 17, 2022

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UNIV CHINA MINING (CN)
XUZHOU SHENGAN INDUSTRIAL SAFETY TESTING RES INSTITUTE CO LTD (CN)
UNIV XUZHOU TECHNOLOGY (CN)

G01M3/28

CN111425695A	2020-07-17
US20090065081A1	2009-03-12
CN111425767A	2020-07-17
CN109352624A	2019-02-19
GB731526A	1955-06-08
CN204165932U	2015-02-18

NANJING DOYES INTELLECTUAL PROPERTY CO., LTD. (CN)

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