公开(公告)号：US11859493B2

公开(公告)日：2024-01-02

申请号：US17269557

申请日：2019-05-14

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Fenghai Yu ,  Kai Zhou ,  Yunliang Tan ,  Xuepeng Gao ,  Wei Zhao

IPC: G01L1/02 ,  E21D9/00 ,  E21D20/00

CPC classification number: E21D9/003 ,  G01L1/02 ,  E21D20/00

Abstract: A device includes a pressure measuring segment, a connecting rod, a hydraulic pump, a pressure gauge, a high-pressure oil pipe, a pressure control valve, a tray, a push rod and a connection casing. The pressure measuring segment is on the connecting rod, a front end of the push rod is connected with the connecting rod, the tray is at a rear end of the push rod, the connection casing is connected with the tray. The pressure measuring segment includes a main pipe, a hydraulic bladder, a fixing ring, a barrier sheet, an outer pillow housing and a connection sleeve. Both ends of the hydraulic bladder are sleeved on the main pipe, an oil inlet is in communication with the hydraulic bladder, the outer pillow housing is sleeved on the main pipe, the connection sleeve is wrapped around the outer pillow housing.