公开(公告)号：US20210010372A1

公开(公告)日：2021-01-14

申请号：US16964511

申请日：2018-12-10

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Lianjun CHEN ,  Guanguo MA ,  Guoming LIU ,  Gang PAN ,  Zhaoxia LIU ,  Gang WANG ,  Wen NIE ,  Wenhui BIAN

IPC: E21D11/10 ,  F04B15/02 ,  F04B7/04 ,  F04B53/10

Abstract: A pulsation-free wet spraying machine resolves the issue of pulsing during pumping of a concrete spraying machine. The wet spraying machine includes a frame, a pumping mechanism, a swing mechanism and a hydraulic system, wherein the pumping mechanism includes a hopper, a material chamber, a concrete feeding mechanism, an auxiliary feeding mechanism and a distribution valve, the hopper is disposed above the material chamber, the concrete feeding mechanism and the auxiliary feeding mechanism each include a hydraulic cylinder, a concrete piston and a concrete cylinder, the concrete cylinder of the concrete feeding mechanism and an auxiliary concrete cylinder of the auxiliary feeding mechanism are both connected with the material chamber, a discharge port is disposed on the material chamber, sealing between the distribution valve and the discharge port is provided by a sealing ring, the distribution valve is disposed inside the material chamber, a front friction plate and a rear friction plate are further disposed inside the material chamber, the swing mechanism includes a swing hydraulic cylinder, a mandrel, a swing arm and a swing hydraulic cylinder base, and the mandrel drives the distribution valve to swing. In addition, The pulsation-free wet spraying machine stably feeds a material, has a compact structure, and is wear-resistant.

公开(公告)号：US20170146679A1

公开(公告)日：2017-05-25

申请号：US15359751

申请日：2016-11-23

Applicant: Shandong University of Science and Technology

Inventor： Weimin CHENG ,  Zhen LIU ,  Gang WANG ,  Gang ZHOU ,  Lianjun CHEN ,  Wen NIE ,  Lin XIN ,  Yanbin YU ,  Guanhua Nl ,  He YANG

IPC: G01V3/08 ,  E21F17/00

CPC classification number: E21F17/00 ,  E21B21/16 ,  E21F5/02 ,  E21F11/00 ,  G01N33/222 ,  G01V3/20 ,  Y02A90/342

Abstract: Described are a test apparatus and a test method for the wetted perimeter of coal seam water injection. In the test apparatus, a columnar insulator is provided between an upper electrode and a lower electrode, circular insulating tapes are located at the outer edges of the upper electrode and the lower electrode, a circular reverse osmosis membrane is provided at the middle of the circular insulating tape, the upper electrode, lower electrode, circular insulating tapes and circular reverse osmosis membrane form an enclosed chamber which is filled with solid sodium chloride, and cotton yarns are packed among the upper resin backing plate, lower resin backing plate, circular insulating tapes and the inner walls of water permeable perforated pipes. The upper electrode is provided with an electrode lead which passes through the columnar insulator, the lower electrode and the lower resin backing plate and goes out from the tail connecting end.