Patents Assigned to China University of Mining and Technology
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Patent number: 9715479Abstract: A memristor linear modeling method for a switched reluctance motor. A non-inverting operational amplifier circuit and an inverting operational amplifier circuit are employed to construct a switched reluctance motor linear phase inductance characteristic element.Type: GrantFiled: January 24, 2013Date of Patent: July 25, 2017Assignee: China University of Mining and TechnologyInventors: Hao Chen, Yan Liang, Dongsheng Yu
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Adjustable intermediate disk body of large double-layer cage and adjusting and moving method thereof
Patent number: 9695017Abstract: An adjustable intermediate disk body of large double-layer cage comprises cage columns, a main intermediate disk body, and a chain block and a connecting piece. An intermediate disk guide rail beam is arranged on the inner side of the cage columns, wedge bases are symmetrically arranged on the two sides of the lower part of the intermediate disk guide rail beam, a limited block with a bolt hole is arranged on the upper part of the intermediate disk guide rail beam, and an anti-disengaging plate is arranged on the intermediate disk guide rail beam.Type: GrantFiled: March 26, 2014Date of Patent: July 4, 2017Assignees: China University of Mining and Technology, Xuzhou Coal Mine Safety Equipment Manufacture Co., Ltd.Inventors: Zhencai Zhu, Gongbo Zhou, Changhua Hu, Guohua Cao, Wei Li, Guoan Chen, Yuxing Peng, Qingyong Du, Zhi Liu -
Patent number: 9605512Abstract: A distributed combined cooling, heating and power energy system for gas extraction in a coal mining area, which belongs to an energy system for gas production.Type: GrantFiled: January 27, 2014Date of Patent: March 28, 2017Assignee: China University of Mining and TechnologyInventors: Baiquan Lin, Qingzhao Li
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Publication number: 20170044673Abstract: A Co3W3C fishbone-like hard phase-reinforced Fe-based wear-resistant coating and the preparation thereof, which belongs to the field of a wear-resistant coating on the surface of a material and a preparation method thereof. The wear-resistant coating comprises: 1.89-3.77% of C, 5.4-11.7% of Cr, 3.3-7.15% of Ni, 28.81-57.83% of W, 4.2-8.4% of Co, 0.03-0.065% of Si and the balance of Fe. The preparation process of the wear-resistant coating comprises: (1) before plasma cladding, pretreating a matrix; (2) pretreating an iron-based alloy powder; and (3) adjusting the process parameters of plasma cladding, preparing a cladding layer with a predetermined width and a predetermined thickness, and naturally cooling same down in air.Type: ApplicationFiled: August 6, 2015Publication date: February 16, 2017Applicant: China University of Mining and TechnologyInventors: Qing TAO, Jian WANG, Cong WANG, Wei LAI, Jianyang LIU, Fanjun GU
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Patent number: 9543872Abstract: A control method for a switched reluctance generator employing dual switched-mode power converters does not require a position sensor. In the excitation stage, the upper tube and lower tube of the main switch of a phase in the power converter are switched on, and the phase current is detected. When the phase current rises to a preset threshold, the upper tube or lower tube of the main switch of the phase is switched off, changing the phase of the switched reluctance generator into a zero voltage natural freewheeling state. When the phase current drops to the valley value, the rotor position is the end position of maximum phase inductance of the phase. This rotor position is used as the switch-off position of the main switch of the phase of the switched reluctance generator, and the upper tube and lower tube for the main switch of the phase are switched off.Type: GrantFiled: January 24, 2013Date of Patent: January 10, 2017Assignee: China University of Mining and TechnologyInventor: Hao Chen
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Patent number: 9494037Abstract: In an inclined layered solid-filling mining method in an ultrathick coal layer, tunnels and equipment are arranged according to a solid-filling mining method. An artificial roof for a lower layer is formed by metal meshes and bamboo fences of a first layer a solid-filling mining method. The method is repeated, until the entire ultrathick coal layer is finished. The method is repeated forming additional roofs for subsequent layers.Type: GrantFiled: January 22, 2014Date of Patent: November 15, 2016Assignee: China University of Mining and TechnologyInventors: Jixiong Zhang, Nan Zhou, Qiang Zhang, Jiwei Guo, Xiaoming Shen, Feng Ju, Haiqiang Jiang
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Mining elevator lapping platform suitable for flexible guide rail and mining elevator lapping method
Patent number: 9394142Abstract: A mining elevator lapping platform suitable for a flexible guide rail and a mining elevator lapping method. The lapping platform mainly comprises a support claw package (1) and a power package (2), wherein the support claw package (1) comprises a mounting plate (1-14), a screw rod bearing base (1-15), a screw rod (1-4), a screw nut (1-2), a support rod (1-5), a pushing rod (1-3), a support claw (1-6). a footboard (1-7), a guide rail (1-9) and a guide rail frame (1-12); the power package (2) comprises an explosion-proof motor (2-1) and a bevel gear; and the support claw package (1) and the power package (2) are both installed on a cross beam (3) below an elevator car.Type: GrantFiled: March 25, 2013Date of Patent: July 19, 2016Assignees: China University of Mining and Technology, Dongnan Elavator Co. Ltd.Inventors: Zhencai Zhu, Guohua Cao, Jiancong Qin, Hongqiao Kang, Wei Li, Gongbo Zhou, Guoan Chen, Renyuan Wu, Yiping Ma, Jianrong Yang -
Patent number: 9281773Abstract: A position sensorless step-wise freewheeling control method for a switched reluctance motor having dual switched-mode power converters for each phase doesn't require any additional external hardware, any rotor-position sensor, or storage of flux linkage data of the motor. After the upper and lower tubes of the main switch are switched off, and the phase of the switched reluctance motor enters into a negative voltage forced freewheeling state, the phase current is detected. When the phase current falls to a preset threshold, one of the upper or lower tubes is switched on and the phase enters into a zero voltage natural freewheeling state. When the phase current reaches a peak value, the rotor position becomes the start position of the minimum phase inductance and the rotor position is used as the switch-on position of the main switch. The upper and lower tubes are then switched on.Type: GrantFiled: January 24, 2013Date of Patent: March 8, 2016Assignee: China University of Mining and TechnologyInventors: Hao Chen, Hui Zeng
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Patent number: 9272881Abstract: A mine elevator is provided having an anti-explosion traction system, an anti-explosion lift car protection system, a flexible guide rail guiding system, a compound lift car, and a counterweight system. The anti-explosion traction system comprises a traction rope tension regulating device, an anti-explosion traction machine, and an anti-explosion control cabinet. The anti-explosion lift car protection system comprises a rope holder, a speed limiter, two hydraulic buffers, a safety clamp, a brake rope, and a brake rope tension buffer device. The flexible guide rail guiding system comprises a steel wire rope guide rail, a guide rail tension device connected to the steel wire rope guide rail and fixed to the an upper platform, a guide rail connection device connected to the steel wire rope guide rail and fixed to a lower platform, and a flexible guide rail guide sleeve fixed to the compound lift car and the counterweight system.Type: GrantFiled: August 25, 2011Date of Patent: March 1, 2016Assignees: China University of Mining and Technology, Dongnan Elevator Co, LtdInventors: Zhencai Zhu, Guohua Cao, Jiancong Qin, Hongqiao Kang, Guoan Chen, Renyuan Wu, Gongbo Zhou, Wei Li, Yiping Ma, Jianrong Yang
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Patent number: 9156655Abstract: A mining elevator traction cable connecting apparatus and a measuring method therefor, for use in a mining elevator serving a deep-mine. The apparatus includes an industrial personal computer (IPC), a signal collector connected to the IPC, multiple symmetrically arranged cable rings for use in connecting to one end of a traction cable, and a traction cable tension adjusting apparatus connected to the multiple of cable rings. Arranged within the traction cable tension adjusting apparatus are a plurality of hydraulic cylinders, and a plurality of draw wire displacement sensors for use in monitoring the relative displacement between each hydraulic cylinder plunger and a corresponding hydraulic cylinder body. The draw wire displacement sensors and an oil pressure sensor connected to a hydraulic pipeline are connected to the IPC via the signal collector, forming a traction cable tension and degree of adjustment measuring system.Type: GrantFiled: August 25, 2011Date of Patent: October 13, 2015Assignees: China University of Mining and Technology, Dongnan Elevator Co., Ltd.Inventors: Guohua Cao, Zhencai Zhu, Jiancong Qin, Hongqiao Kang, Guoan Chen, Chongqiu Wang, Renyuan Wu, Yongguang Cao, Junhui Wu, Yilei Li
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Publication number: 20140340056Abstract: A control method for a switched reluctance generator employing dual switched-mode power converters does not require a position sensor. In the excitation stage, the upper tube and lower tube of the main switch of a phase in the power converter are switched on, and the phase current is detected. When the phase current rises to a preset threshold, the upper tube or lower tube of the main switch of the phase is switched off, changing the phase of the switched reluctance generator into a zero voltage natural freewheeling state. When the phase current drops to the valley value, the rotor position is the end position of maximum phase inductance of the phase. This rotor position is used as the switch-off position of the main switch of the phase of the switched reluctance generator, and the upper tube and lower tube for the main switch of the phase are switched off.Type: ApplicationFiled: January 24, 2013Publication date: November 20, 2014Applicant: China University of Mining and TechnologyInventor: Hao Chen
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Publication number: 20140340006Abstract: A position sensorless step-wise freewheeling control method for a switched reluctance motor having dual switched-mode power converters for each phase doesn't require any additional external hardware, any rotor-position sensor, or storage of flux linkage data of the motor. After the upper and lower tubes of the main switch are switched off, and the phase of the switched reluctance motor enters into a negative voltage forced freewheeling state, the phase current is detected. When the phase current falls to a preset threshold, one of the upper or lower tubes is switched on and the phase enters into a zero voltage natural freewheeling state. When the phase current reaches a peak value, the rotor position becomes the start position of the minimum phase inductance and the rotor position is used as the switch-on position of the main switch. The upper and lower tubes are then switched on.Type: ApplicationFiled: January 24, 2013Publication date: November 20, 2014Applicant: China University of Mining and TechnologyInventors: Hao Chen, Hui Zeng
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Publication number: 20140110194Abstract: A mine elevator is provided having an anti-explosion traction system, an anti-explosion lift car protection system, a flexible guide rail guiding system, a compound lift car, and a counterweight system. The anti-explosion traction system comprises a traction rope tension regulating device, an anti-explosion traction machine, and an anti-explosion control cabinet. The anti-explosion lift car protection system comprises a rope holder, a speed limiter, two hydraulic buffers, a safety clamp, a brake rope, and a brake rope tension buffer device. The flexible guide rail guiding system comprises a steel wire rope guide rail, a guide rail tension device connected to the steel wire rope guide rail and fixed to the an upper platform, a guide rail connection device connected to the steel wire rope guide rail and fixed to a lower platform, and a flexible guide rail guide sleeve fixed to the compound lift car and the counterweight system.Type: ApplicationFiled: August 25, 2011Publication date: April 24, 2014Applicant: China University of Mining and TechnologyInventors: Zhencai Zhu, Guohua Cao, Jiancong Qin, Hongqiao Kang, Guoan Chen, Renyuan Wu, Gongbo Zhou, Wei Li, Yiping Ma, Jianrong Yang
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Patent number: 8074805Abstract: An extra-large vibrating screen with duplex statically indeterminate mesh beam excitation body and plate type combined bearing beam comprises plate type flat and rigid statically indeterminate combined bearing beam (12) arranged in a screen box (1), a plurality of Y-shaped statically indeterminate combined reinforcing beams (5) arranged on the side plates (3) of the screen box alternately, duplex statically indeterminate supporting plates (22) linking a plurality of mesh beams (21) to the statically indeterminate connecting plate (4) and the side plate (3) so as to form a container made of a beam system, the vibration exciters (10) in the statically indeterminate mesh beam unit comprising eight sets of vibration exciters, which are aligned in pair horizontally and linked together through universal couplings (9), and connected to the duplex statically indeterminate mesh beam excitation body (11) to form a highly rigid integral vibrating assembly.Type: GrantFiled: December 19, 2007Date of Patent: December 13, 2011Assignee: China University of Mining and TechnologyInventors: Yuemin Zhao, Chengyong Zhang
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Patent number: 7918944Abstract: A surface carburization technique of medical titanium alloy femoral head in total hip arthroplasty comprises subjecting medical titanium alloy TC4 to surface carburization by using acetylene as carburizing agent to carry out gaseous carburization at high temperature to give medical titanium alloy femoral head in total hip arthroplasty with TiC ceramic on surface thereof. The TiC ceramic layer on femoral head can be more than 100 micron thick, which is relatively thick, overcomes the disadvantages in available medical titanium alloy material, and is particularly useful for replacement of total hip or knee arthroplasty.Type: GrantFiled: April 10, 2008Date of Patent: April 5, 2011Assignee: China University of Mining and TechnologyInventors: Shirong Ge, Yong Luo
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Patent number: 7717649Abstract: A suspending hydraulic pillar includes an oil cylinder, a movable prop, a handle-valve body, a reset spring, a top cover, a bottom seat, a three-way valve, a position-limiting steel wire, and a guide ring. The handle-valve body is provided between a port of the oil cylinder port and the moveable prop. Position-limiting steel wire, a guiding ring, and an oil inlet is located on a lower part of the moveable prop. The three-way valve is provided in the handle-valve body. A dust-prevention ring and a sealing ring are provided between the handle-valve body, the movable prop, and the oil cylinder. The handle-valve body is fixed on the oil cylinder by means of a connecting steel wire. The handle-valve body does not move up and down as the movable prop telescopically extends or contracts. The suspending hydraulic has good stability, high strength and supporting force, good sealing, and high anti-erosive capability.Type: GrantFiled: December 31, 2005Date of Patent: May 18, 2010Assignee: China University of Mining and TechnologyInventors: Bingwen Li, Jiyun Zhao, Qiguang Wang, Shiqi Chen, Jianwu Wang, Weimin Chen
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Patent number: 7617938Abstract: An elastic sieving method and corresponding large-sized elastic vibration screen. The present invention utilizes a screening surface and a separate sieving machine. A screen mat located on the sieve box is connected to multiple small rectangular screens. While the machine is vibrating, the resonation of screen rods located on the screen mat connected by small rectangular screens are initiated to screen the material and to cause the vibration of the whole vibration screen and realize the conveyance and lamination of materials. Because the screening surface is in a state of resonance, the vibration strength is strong enough to prevent the screen meshes from becoming plugged, allowing for high sieving efficiency. A bearing in the sieving mechanism is installed with a vibration damping ring, placing the bearing in a resonant state, allowing for a low dynamic stress level, which satisfies the process requirement for large-sized vibration screen excitation units with a screening surface as wide as 4800 mm.Type: GrantFiled: September 28, 2006Date of Patent: November 17, 2009Assignee: China University of Mining and TechnologyInventors: Yuemin Zhao, Chusheng Liu, Chengyong Zhang
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Patent number: 5392922Abstract: A high capacity dry separation apparatus with air-heavy medium fluidized bed having a separation chamber (3) with a fluidized bed above an air distributor (4), a scraper conveyer (2) in the separation chamber (3) having a double-scraper structure made up of two columns of scrapers moving side by side, and a sink discharge outlet (8) at one end of the separation chamber. An up-floating materials discharge outlet (11) and a feed inlet (12) are arranged on opposite sides of the separation chamber (3). An inclined inner circulator (7) for heavy medium is provided in the separation chamber and includes an air inlet tube (13), a cone-shaped buffer chamber (14), a sieve layer (15), a multilayer fabric (16) and a sintered metal plate (17).Type: GrantFiled: October 12, 1993Date of Patent: February 28, 1995Assignee: China University of Mining and TechnologyInventor: Qingru Chen
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Patent number: 5049163Abstract: This invention discloses a process for reducing sulphur dioxide emission from burning coal containing sulphur. In the disclosed process, pulverized combustible materials, such as coal, wood flour, combustible plant, charcoal, etc., and a sulphur trapping agent composition are mixed homogeneously to form an admixture which is ground to powder with dimension from about 30 mesh to about 60 mesh. With an improved roll briquetter of the present invention, briquettes with a microporous surface layer of said admixture powder can be prepared. In such briquettes, the atomic ratio of calcium in the sulphur trapping agent composition to sulphur in the pulverized coal is within the range of from about 1.0 to about 2.0. Microporous pellets of said admixture having opening-porosity are also prepared with conventional roll briquetter. The diameter of the prepared pellets is within the range from about 8 mm to about 20 mm. A layer of said pellets covers the surface of pulverized coal in a burner for combustion.Type: GrantFiled: December 26, 1989Date of Patent: September 17, 1991Assignee: Briquetting Research and Design Institute, Beijing Graduate School of China University of Mining and TechnologyInventors: Zhongcheng Huang, Peilan Wang, Xiaoxu Lei