China University of Mining and Technology (CUMT)

Dongnan Elevator Co, Ltd

Xuzhou Coal Mine Safety Equipment Manufacture Co., Ltd.

Xuzhou Zhirun Mining Equipment Science and Technology Co., Ltd

Xuzhou Zhongmine Transmission Track Technology Co., Ltd

Inner Mongolia University of Technology

Xuzhou Hengyuan Electrical Appliances Co., Ltd

Dongnan Elavator Co. Ltd.

Wei Li

Zhencai Zhu

Gongbo Zhou

Guohua Cao

Yuxing Peng

Guoan Chen

Gang Shen

Jiancong Qin

Yiping Ma

Hongqiao Kang

Jianrong Yang

Renyuan Wu

Shaoyi Xu

Fangfang Xing

Fan Jiang

Yuqiao Wang

Xing Zhang

Xin Zhang

Songyong Liu

Chaoquan Tang

Changhua Hu

Ping Zhou

Qingyong Du

Hongyu Xue

Yuan Sun

Xiang Li

Hao Lu

Gang Zhang

Weihong Peng

Yao Chen

Ying Wang

Hongxiang Jiang

Dagang Wang

Xiao Chen

Yong Ren

Xiumei Liu

Lei Si

Beibei Li

Feng Dong

Guang Chen

Houlian Wang

Qiang Peng

Mingquan Qiu

Penghui Wang

Peng Zhang

Zhi Liu

Hong Lai

Zhixiang Li

Xuefeng Yang

Mengbao Fan

Ruilin Wang

Xianghui Wang

En Lu

Jinyong Ju

Lianchao Sheng

Qiao Gao

Jiang Fan

Ronghua Wu

Ling Yue

Wenxiang Teng

Wenting Lu

Jinsong Zhu

Ziyi Jiang

Ge Zhao

The present invention discloses a vehicle-mounted large-flow fire-fighting foam fluid mixing system, including a supply kit, a mixing kit, a control kit, and a pipeline kit. The supply kit includes an auxiliary gas supply device, a fire pump, an integrated foam pump, a fire pump main motor, and a coupling. The mixing kit includes a fire monitor interface, a foam generating device, and a fluid mixing device. The control kit includes a foam mixing proportion single-chip microcomputer control system, an alarm module, a power module, an auxiliary air compressor switch module, a frequency converter, and a central control display screen. The pipeline kit includes an air drainage tube, a fire hose, a foam liquid pipe, and a pipeline valve. For the problems of flow fluctuation and low foam foaming efficiency, the present invention optimizes the design and adopts a new control policy, thereby implementing precise mixing under the large-flow condition.

Vehicle-mounted large-flow fire-fighting foam fluid mixing system

An apparatus includes a current excitation source, a roadheader telescopic protection cylinder, an electric rotating apparatus, auxiliary cutting teeth, a cutting head entity, a transmission shaft, an optical fiber ring protective housing, an optical fiber ring, an optical fiber current sensor control unit and a recovery electrode. The apparatus transmits an auxiliary current Iand a monitoring current Ito a coal seam. The auxiliary current Iand the monitoring current Iare homologous currents that are incompatible, and the auxiliary current Isqueezes the monitoring current I, so the monitoring current Imonitors the environment of the coal seam. The monitoring current Iflows to the coal seam as, and a return current Iflows through the transmission shaft and a roadheader expansion part. The optical fiber ring measures the return current I, when the roadheader is heading forward and encounters abnormal geological bodies.

Environmental monitoring apparatus and method for mine tunneling robot

A device and method for detecting an angle of a shearer rocker arm based on optical fiber sensing. The device includes an optical system and a mechanical system. The optical system includes a broadband light source, a polarizer, collimating lenses, a gradient-rotation media plate, a polarization beam splitter, and a data processing module. The mechanical system includes a connecting base, connecting rods, a slider, a bracket, and a sensor housing. When the shearer operates, the rocker arm converts rotation angle information to linear displacement related to a gradient refractive index by using a connecting rod mechanism, and a position on the gradient-rotation media plate through which linearly polarized light produced by the optical system passes also changes. Due to an optical rotation effect, corresponding rotation angles of a plane of polarization that are formed after the light passing through the gradient-rotation media plate also vary.

Device and method for detecting angle of shearer rocker arm based on optical fiber sensing

A method for detecting an insulation damage location in a reflux rail of a subway/coal mine and a transition resistance thereof includes the following steps: connecting a reflux rail to a negative electrode of a substation, selecting a location at a connecting point as a reference location, and mounting a potential detection apparatus at the reference location; mounting a travel distance detection apparatus and a traction current detection apparatus on a locomotive, traveling, by the locomotive, to the substation along the reflux rail, where the three detection apparatuses send respectively recorded data to a control unit; and determining, by the control unit, a potential jump from received potential data and a corresponding jump time, and determining a running distance of the locomotive at a jump moment and a total running length of the locomotive, so as to determine a ground insulation damage location.

Method for detecting insulation damage location in reflux rail of subway/coal mine and transition resistance thereof

A movable belt breakage prevention and catching system for a belt conveyor includes a detection device, two tracks, a plurality of catching devices, and a control system. The detection device is mounted on the belt conveyor, and is configured to detect whether a belt of the belt conveyor has a crack. The two tracks are symmetrically arranged on both sides of the belt conveyor, and the plurality of catching devices are symmetrically arranged on the two tracks. The control system is configured to control the plurality of catching devices to simultaneously catch the belt firmly when the detection device detects that the belt has a crack; and after firmly catching the belt, each catching device is able to unidirectionally move along with the belt along the track where the catching device is positioned.

Movable belt breakage prevention and catching system for belt conveyor

A reliability robust design method for multiple failure modes of an ultra-deep well hoisting container, including: defining randomness of a structural parameter, a material property, and a dynamic load of a hoisting container, and solving a random response of a structural failure for a random parameter using a design of experiment method; establishing reliability performance functions of each failure modes in accordance with failure criterion of the hoisting container; establishing a joint probability model of correlated failures using a copula theory in consideration of probability correlation between the failure modes; establishing, a system reliability model with failure correlation of the hoister container; establishing a sensitivity model concerning each random parameter for system reliability of the hoisting container; and establishing, in conjunction with an optimization design model, a reliability robust optimization design model for the hoisting container using a joint failure probability and parameter sensitivity as constraints.

Reliability robust design method for multiple failure modes of ultra-deep well hoisting container

A synchronous monitoring device and a method for radial and axial vibration of a shearer drum. The monitoring device includes a laser, a first optical fiber coupler, an optical isolator, a second optical fiber coupler, a third optical fiber coupler, an optical fiber collimator, a first photodetector, a second photodetector, a first signal processing module, and a second signal processing module which are disposed on a shearer ranging arm, as well as a reflective coating disposed on a shearer drum. By measuring a phase difference between original light and reflected light, axial vibration of the shearer drum is monitored, and by measuring an intensity difference between original light and reflected light, radial vibration of the shearer drum is monitored.

Synchronous monitoring device and method for radial and axial vibration of shearer drum

A vertical shaft steel wire rope cage guide sliding sleeve wear amount detection device includes flexible printed circuit (FPC) flat cable units, voltage detection circuit units, a control system, and data display equipment. Two end faces of a vertical shaft steel wire rope cage guide sliding sleeve are provided with the FPC flat cable units, the FPC flat cable units being sequentially attached to end portion surfaces of the sliding sleeve along an outer periphery of a rope hole of a steel wire rope to form an enclosure; each FPC flat cable unit is connected to one voltage detection circuit unit; a signal input end of the control system is connected with the voltage detection circuit units, and a signal output end of a control module is connected to a wireless transmission module; and the data display equipment receives data transmitted by the wireless transmission module.

Vertical shaft steel wire rope cage guide sliding sleeve device and detection method thereof

Disclosed is a method for estimating tension of a chain of a scraper conveyor, belonging to a method for estimating chain tension. The method comprises the following steps: embedding strain sensors in a plurality of scrapers of a scraper conveyor to measure the tension of weak coupling points between the scrapers and chains, converting acquired sensor signals into data signals through an A/D conversion unit, transmitting the data signals to a data control center using a wireless transmission module, further processing the tension data information of the weak coupling points through the data control center, establishing a chain tension distribution model, and determining an the estimated tension of the chain of the scraper conveyor. The method provided by the present invention is simple, efficient and practical, and the estimation of tension of the whole continuous moving chain is completed by the tension measurement at limited positions of the chain. The chain of the scraper conveyor is meshed with a sprocket and continuously moves in a middle trough and its tension also changes in real time along with the load; the strain sensors are arranged on the scrapers to measure the tension of the weak coupling points between the scrapers and the chains, and the estimation of tension of the whole chain is completed by tension measurement at limited positions on the chain.

Method of estimating tension of chain of scraper conveyor

A fracture detection system and method for a dumbbell pin of a scraper conveyor. The system comprises a scraper conveyor, a wireless ranging apparatus (), a wireless communication device, a support controller and a monitoring center. The wireless ranging apparatus () is mounted on a ramp plate ledge of a scraper conveyor chute (), and has a laser range finder and a reflection target plate () for detecting a relative displacement between any two adjacent chutes. The wireless communication device realizes communication between the wireless ranging apparatus () and the support controller, and transmits the displacement of the laser range finder to the support controller in a wireless transmission manner. The support controller controls an action of the scraper conveyor chute (). A monitoring center is electrically connected to the support controller, and can perform storage processing on relative displacement data of any adjacent chutes. In the method, by taking a relative displacement value between adjacent chutes as a reference, whether a fracture fault occurs in a dumbbell pin is judged, the position of the fractured dumbbell pin can be accurately determined, and a support controller controls a chute action, thereby having a high promotion and usage value.

Fracture detection system and method for dumbbell pin of scraper conveyor

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.

Intelligent charger with diagnostic function and charging method

A device for monitoring tension equalization and displacement adjustment states of steel wire ropes of a multi-rope hoister includes a displacement sensor mounted on a steel wire rope tension equalization device, a signal acquisition transmitter designed to store and transmit signals of the displacement sensor, a barometric altimeter designed to detect the depth of a mine shaft where a hoisting container is located, and a wireless receiving and processing system arranged at the well mouth of the mine shaft. A method for use includes collecting the displacement adjustment amounts of the tension equalization devices connected with all the hoisting ropes of the hoisting container and the corresponding depth position of the hoisting container during the up-down running process of the hoisting container by means of the signal acquisition transmitter; judging the maximum displacement adjustment amount measured in the entire hoisting process and the corresponding tension adjustment device and corresponding depth, by receiving and processing data via the wireless receiving and processing system; and, giving an alarm when the maximum adjusted displacement is greater than a preset adjustment threshold.

Method and device for monitoring tension equalization and displacement adjustment states of steel wire ropes of multi-rope hoister

An energy supply method and device for a monitoring wireless sensor node of a roller. A node energy supply device () is arranged on a roller web (). The node energy supply device () comprises a generator (-), a disc rail (-), an input shaft (-), a swing link (-), a swing wheel (-) and an energy collection module (-). The generator (-) is driven to rotate using the rotation motion of the roller, the mechanical energy is converted into electric energy by the generator (-), and power is supplied to a monitoring wireless sensor node by the energy collection module (-). After rectification, filtering and voltage stabilization are conducted on the electric energy generated by cutting a magnetic induction line when the generator (-) operates, the energy collection module (-) uses the electric energy for charging an internal battery of the monitoring wireless sensor node. When the roller operates, the swing wheel (-) will keep vertically downward because of the gravity action thereof, thereby rotating relative to the input shaft (-) of the generator (-) to drive the generator (-) to operate. The present invention has the advantages of simple structure without manual operations, and energy saving and environmental protection.

Energy supply method and device for monitoring wireless sensor node of roller

Disclosed is a fall prevention brake buffering system for high-speed mine lift, including brake ropes () fixed on two sides of a car (). One end of the brake rope () is fixed on the top part of a vertical well (), and the other end is fixed on the bottom part of the vertical well (). A linkage mechanism () is arranged at the bottom of the car (). A buffer () is arranged at the top of the brake rope (), and a tension connector () is arranged at the bottom of the brake rope (). A brake rope safety tong () fixed on the brake rope () and connected with the linkage mechanism () is arranged at the bottom of the car (). The buffer () includes an inverted brake rope gradual safety tong () with a buffering rope () provided therein and connected with the brake rope (). A buffering rope clip () is arranged on the buffering rope (). The system is convenient to install, and the buffering force of the brake rope is constant and adjustable. The system realizes reliable fall prevention brake function, greatly improves safety performance during high-speed operation of a lift with non-rigid rails, and increases safety performance during high-speed operation of a mine lift.

Fall prevention brake buffering system for high-speed mine lift

A mining elevator carrying platform and carrying method, the platform comprises a power system () and a four-rod carrying device (), a rotating rod () connected with the power system () is set on the carrying device (); the power system () comprises a flameproof motor (-), a upper-limited switch (-), a down-limited switch (-) and a main pulley (-), the flameproof motor (-) is connected with the main pulley (-) through a main steel cable (-), a baffle (-) is set on the main steel cable (-), a double cable channel is set on the main pulley (-), and the main pulley (-) is connected with a sub-pulley (-) by a sub-steel cable (-), a sliding plate (-) is set on the sub-steel cable (-), and a sliding rod (-) is set on the sliding plate (-). The main pulley (-) is driven to rotate by the flameproof motor (-) through the main steel cable (-), thus the sub-pulley (-) is driven to rotate. The sliding rod (-) moves in a strip-opening sliding slot in the rotating rod () by the sliding plate (-) moving up and down, then the rotating rod () and a carrying plate (-) are driven to move circumferentially. A rocker (-) is rotated around a supporting bracket (-) driven by a connecting rod (-), thus a credible carrying platform in multi-plane is realized. The platform is simple in structure, controlled accurately, convenient to be fixed and maintained, operated stably and reliably, and has the self-locking function.

Mining elevator carrying platform and carrying method

Growing community of inventors

Xuzhou, China

Wei Li