公开(公告)号：US20190249382A1

公开(公告)日：2019-08-15

申请号：US16343773

申请日：2017-11-07

Applicant: China University of Mining and Technology ,  JIANGSU XINCHUANG SAFETY TECHNOLOGY RESEARCH INSTITUTE CO., Ltd.

Inventor： Fubao ZHOU ,  Chun LIU ,  Zhongyi MAN

IPC: E01F13/04

Abstract: A stampede preventing method for a pedestrian passage in a confined space of a subway. Pedestrian flow sensors are arranged on a pedestrian passage, where the pedestrian flow sensors are connected to a control unit by means of data transmission lines, the control unit is connected to stampede preventing devices and top ends of the stampede preventing devices are connected to movable walls and handrails; the pedestrian flow sensors transmit a pedestrian number and crowdedness that are monitored in real time; the control unit analyzes signals of the pedestrian flow sensors according to a system program, and determines whether crescent buffer space areas need to be opened in the pedestrian passage; the control unit issues different expansion commands according to different degrees of crowdedness; and the stampede preventing devices control the movable walls and the handrails to start contracting to form the crescent buffer space areas.

公开(公告)号：US10370942B2

公开(公告)日：2019-08-06

申请号：US15325506

申请日：2015-12-21

Applicant: China University of Mining and Technology

Inventor： Baiquan Lin ,  Ting Liu ,  Quanle Zou ,  Chang Guo ,  Chuanjie Zhu ,  Hao Yao ,  Fazhi Yan ,  Jia Kong ,  Yidu Hong

IPC: E21B43/24 ,  E21B43/30 ,  E21B43/00 ,  E21F7/00 ,  E21B7/00

Abstract: A method for combining integrated drilling, flushing and slotting with thermal injection to enhance coalbed gas extraction, applicable to managing gas extraction from microporous, low-permeability, high-adsorption coalbed areas. A gas extraction borehole is drilled within a certain distance of a predetermined drilling, flushing and slotting borehole, and, once sealed, is used for gas extraction. An integrated drilling, flushing and slotting drill bit is used to sink the borehole, which is then sealed. Concentration variation in the gas extraction borehole is monitored in real time, and when concentration is below 30%, borehole is opened and high-temperature steam is injected by means of a steam generator, after which the borehole is again closed. Drilling a drilling, flushing and slotting borehole increases pressure relief space and the surface of exposed coal, relieves stress on the coal body, and increases gas permeability of the coalbed, while the injection of high-temperature steam promotes gas desorption in the coal body, promotes crack propagation around the borehole, and increases channels for gas flow, thus achieving highly efficient extraction of gas from the coalbed.

公开(公告)号：US20190226958A1

公开(公告)日：2019-07-25

申请号：US16313469

申请日：2017-12-07

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING

Inventor： Yang JU ,  Peng LIU ,  Hongbin LIU ,  Yongming YANG

IPC: G01N3/12 ,  G01N3/18

CPC classification number: G01N3/12 ,  G01N3/18 ,  G01N2203/0019 ,  G01N2203/0048 ,  G01N2203/0062 ,  G01N2203/0226 ,  G01N2203/0228 ,  G01N2203/0256 ,  G01N2203/026

Abstract: A device for stress-freezing experiments during fracturing process according to the present application, in which heating and cooling treatment on a specimen under corresponding temperature control according to a preset temperature gradient and a photosensitive curve is performed by a temperature control system, to realize stress-freezing of the specimen; a pressure is applied to a specimen by a true triaxial servo loading system; and corresponding fracturing experiments are performed to the specimen by a fracturing liquid pumping system having an output end arranged in a thermo-controlled oven.

公开(公告)号：US10352167B2

公开(公告)日：2019-07-16

申请号：US16084971

申请日：2016-12-01

Applicant: China University of Mining and Technology

Inventor： Jixiong Zhang ,  Nan Zhou ,  Wenyue Qi ,  Qiang Zhang ,  Meng Li

IPC: F16M11/00 ,  E21D15/60 ,  E21D15/20

Abstract: The present invention discloses a process method for withdrawing and recovering a mechanical constant-resistance single prop, specific steps involving: detecting a working resistance and a degree of deformation of a mechanical constant-resistance single prop, releasing lug clamp bolts of a recoverable base, knocking a lower portion of a cylinder body of the mechanical constant-resistance single prop to disengage the mechanical constant-resistance single prop from the recoverable base, and dismantling the mechanical constant-resistance single prop. Parts are classified and recovered based on degree of deformation thereof. By means of the foregoing method, a process of withdrawing and recovering a mechanical constant-resistance single prop is standardized, simple and fast disengagement of the mechanical constant-resistance single prop is achieved, and parts that can still be used can be sufficiently recovered and reused, thereby achieving the objectives of saving energy and reducing costs.

公开(公告)号：US10288549B2

公开(公告)日：2019-05-14

申请号：US16079521

申请日：2017-03-02

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Yuxing Peng ,  Zhencai Zhu ,  Wenxue Xu ,  Zhiyuan Shi ,  Xiansheng Gong ,  Xiangdong Chang ,  Dagang Wang ,  Guohua Cao ,  Songyong Liu

IPC: G01N19/02 ,  G01L5/06

Abstract: Systems and methods for detecting a layer-to-layer transition of a lifting steel wire rope on a reel are described. The system includes a reel assembly for winding a steel wire rope on a reel and a tensioning assembly for tensioning a segment of said steel wire rope. The system further includes a loading assembly and a lead screw sliding assembly. The loading assembly provides a vertical loading to the tensioning assembly so as to generate a loading force between the tensioned steel wire rope and the steel wire rope wound around the reel. The lead screw sliding assembly drives the tensioning assembly so as to move on a horizontal guide rail to generate a relative displacement between the tensioned steel wire rope and the steel wire rope wound around the reel. The tensioning assembly is connected to the loading assembly via a first threaded rod and a static torque sensor.

公开(公告)号：US20190085691A1

公开(公告)日：2019-03-21

申请号：US16084971

申请日：2016-12-01

Applicant: China University of Mining and Technology

Inventor： Jixiong ZHANG ,  Nan ZHOU ,  Wenyue QI ,  Qiang ZHANG ,  Meng LI

IPC: E21D15/60 ,  E21D15/20

CPC classification number: E21D15/60 ,  E21D15/20

Abstract: The present invention discloses a process method for withdrawing and recovering a mechanical constant-resistance single prop, specific steps involving: detecting a working resistance and a degree of deformation of a mechanical constant-resistance single prop, releasing lug clamp bolts of a recoverable base, knocking a lower portion of a cylinder body of the mechanical constant-resistance single prop to disengage the mechanical constant-resistance single prop from the recoverable base, and dismantling the mechanical constant-resistance single prop. Parts are classified and recovered based on degree of deformation thereof. By means of the foregoing method, a process of withdrawing and recovering a mechanical constant-resistance single prop is standardized, simple and fast disengagement of the mechanical constant-resistance single prop is achieved, and parts that can still be used can be sufficiently recovered and reused, thereby achieving the objectives of saving energy and reducing costs.

公开(公告)号：US10065804B1

公开(公告)日：2018-09-04

申请号：US15571045

申请日：2016-12-07

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Fan Jiang ,  Zhencai Zhu ,  Wei Li ,  Sunyang Wu ,  Gongbo Zhou ,  Guohua Cao ,  Yuxing Peng ,  Hao Lu ,  Chunli Hua

IPC: B65G43/06 ,  B65G19/08 ,  G01L1/22 ,  B65G19/22

Abstract: A chain fault diagnosis system and a chain fault diagnosis method for a scraper conveyor are provided. The diagnosis system includes a strain rosette attached on a top end surface of each sprocket tooth of the scraper conveyor. The strain rosette is connected to a signal gathering unit fixed on a scraper conveyor roller through a shielded conductor, the signal gathering unit sends a gathered signal to a wireless receiving device by means of wireless transmission, and the wireless receiving device transmits the gathered signal obtained thereby to an industrial control computer through a USB interface. The diagnosis method includes the following three steps: chain dislocation/skip fault judgment, chain breakage fault judgment and chain seizure fault judgment. A comprehensive monitoring of the chain state of the scraper conveyor is performed by measuring strain magnitudes in different directions of the sprocket tooth in real-time, transmitting the gathered signal to the industrial control computer via a wireless transmission method and dynamically diagnosing the faults of seizure, dislocation, skip and breakage of the scraper conveyor chain based on the obtained strain data.

公开(公告)号：US20180237371A1

公开(公告)日：2018-08-23

申请号：US15548100

申请日：2016-12-07

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Jing LIANG ,  Huihui YANG ,  Xianyong WEI ,  Zhimin ZONG

IPC: C07C51/21 ,  B01J31/02

CPC classification number: C07C51/21 ,  B01J31/0237 ,  B01J31/0247 ,  B01J31/0249 ,  B01J31/04 ,  B01J2231/70 ,  C07C51/27 ,  C07C53/02 ,  C07C53/08 ,  C07C55/06 ,  C07C55/08 ,  C07C59/19 ,  C07C63/06

Abstract: Disclosed is a method of catalytic oxidation of lignite using oxygen as an oxidant at atmospheric pressure, belonging to a method of mild oxidation of lignite. The method is used to mildly oxidize the lignite using the oxygen as the oxidant under the action of a nitroxide radical catalyst and a metal salt or metal oxide cocatalyst; the process comprises the following steps: pulverizing the lignite to 200 meshes or less, drying a pulverized coal sample at a temperature of 80° C. in vacuum for 10 h, weighing 0.5 g of the treated coal sample, sequentially adding 10 ml of acetic acid, 0.5 mmol of a catalyst and 0.15 to 0.25 mmol of a cocatalyst into a round-bottom flask, connecting a tee joint to an upper orifice of a condenser pipe, replacing oxygen in vacuum for three times so that the round-bottom flask is filled with the oxygen, keeping oxygen pressure at 0.1 MPa, reacting at a temperature of 80° C. to 120° C. for 4 to 12 h; filtering after the reaction is finished; decompressing a filtrate to remove the acetic acid, adding a small amount of ethyl acetate to dissolve, then using an excess CH2N2/ether solution to esterify for 10 h at room temperature, using 0.45 μm filter paper to filter, and analyzing an esterified product through a gas chromatography-mass spectrometer. The method has the advantages of using the oxygen as the oxidant, having low price, having no toxicity, and achieving environmental protection and mild conditions.

公开(公告)号：US20180219393A1

公开(公告)日：2018-08-02

申请号：US15766817

申请日：2015-12-28

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY ,  XUZHOU HENGYUAN ELECTRICAL APPLIANCES CO.,LTD

Inventor： Gongbo ZHOU ,  Houlian WANG ,  Zhencai ZHU ,  Zhixiang LI ,  Wei LI ,  Guohua CAO

IPC: H02J7/00 ,  G01R31/36

CPC classification number: H02J7/0029 ,  G01R31/3634 ,  G01R31/3679 ,  H02J7/0047 ,  H02J7/007 ,  H02J2007/0049

Abstract: An intelligent charger with a diagnostic function and a charging method. The intelligent charger includes a control module, a diagnosis module, a charging module, a multi-path switch and a detection module. The control module is sequentially connected to the diagnosis module, the charging module and the multi-path switch; and the detection module is sequentially connected to an external connection terminal of a battery, the multi-path switch and the fault diagnosis module. The charging method includes a charging mode and a diagnosis mode; the diagnosis mode includes a two part function, namely fault diagnosis and lifetime detection; the fault diagnosis is detecting a fault problem which can occur in the battery and providing a prompt; and the lifetime detection is detecting the current capacity of a battery, and determining current battery life through the ratio of current capacity to rated capacity.

公开(公告)号：US20180162700A1

公开(公告)日：2018-06-14

申请号：US15112392

申请日：2015-07-09

Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

Inventor： Zhencai Zhu ,  Guohua Cao ,  Yang Yang ,  Weihong Peng ,  Yuxing Peng ,  Gongbo Zhou ,  Wei Li ,  Shanzeng Liu

IPC: B66B17/18

CPC classification number: B66B17/18 ,  B66B17/16

Abstract: A lap joint platform of a large-load lifting container, comprising a machine frame (18), a rocker arm platform (14), a rear rocker arm platform (17), a locking device and lifting devices. The rocker arm platform (14) is hinged with the top of the machine frame (18) through a shaft set (15) and is provided with mine car rails (24) and a rubber-tired vehicle support face (26). The rear rocker arm platform (17) is fixed with the top of the machine frame (18) through bolts. The locking device is arranged below the rocker arm platform (14) and comprises a locking lower sliding block cover plate (7), a locking lower sliding block (9), a locking upper sliding block (10), a locking oil cylinder front support (11), a locking lower sliding block guide rail (12), a locking inclined rail (13) and a locking oil cylinder (16). The lifting device is arranged below the locking device and comprises a connecting rod lower support (1), a support pawl connecting rod (2), a support pawl push rod (3), a support pawl (5), a support pawl rear end (6), a support oil cylinder rear base (19), a support oil cylinder (20), an anti-collision rear buffer base (21), an anti-collision buffer (22) and a support guide block (23). The lap joint platform is stable in the loading and unloading process, simple to operate and large in steel wire rope compensation height.