Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21D - Shafts; Tunnels; Galleries; Large underground chambers › E21D 15 - Props; Chocks
Patents for E21D 15 - Props; Chocks (3,432)
05/2014
05/07/2014CN103775115A 侧摆移位立式压缸机 Side of the pendulum shift vertical pressure cylinder machine
05/07/2014CN103775114A 煤矿井下车用单体支柱架设装置 Prop coal mine car mount devices
05/07/2014CN103775113A 一种控制液压支架阀换向的装置 A hydraulic stent valve means for controlling the commutation
05/07/2014CN103775112A 一种螺旋缠绕焊接加装防腐层液压支架立柱方法 Installation in a spiral wound welded hydraulic support column coating method
05/07/2014CN103775111A 一种复合连接的矿用工字钢支架 Mine is connected with a composite steel Support
05/07/2014CN103775084A 大倾角、大采高综采设备过地质构造破碎带施工工艺 Large angle and high cutting mining equipment over geological fracture zone construction process
04/2014
04/30/2014CN203570330U Vertical type vertical column demounting and mounting machine
04/30/2014CN203570329U Clamping cable for rock burst preventing support
04/30/2014CN203570328U Rock burst preventing support
04/30/2014CN203570327U New type four-column supporting type bottom net laying support
04/30/2014CN203570326U Gate type rock burst prevention support
04/30/2014CN103758546A Anti-slide bottom-lifting mechanism for hydraulic support
04/30/2014CN103758545A Anti-slide mechanism for top beam of hydraulic support
04/30/2014CN103758544A Method for additionally arranging anti-corrosion coating on hydraulic-support stand column in hot installation hole shrinkage welding mode
04/30/2014CN103758543A Temporary advanced support device
04/30/2014CN102562101B Machine-mounted steel beam supporting device
04/23/2014CN203559913U Repairing device suitable for U-shaped steel clamp rail
04/23/2014CN203559912U Single-telescopic hydraulic support stand column with high working resistance
04/23/2014CN203559911U Device for protecting heading face from rib spalling
04/16/2014CN203547778U Hydraulic control one way lock
04/16/2014CN203547767U Column capital capable of increasing shoring superficial area of single hydraulic prop and improving working performance of single hydraulic prop
04/16/2014CN203547766U Mining opposite telescopic pressure display single hydraulic prop
04/16/2014CN203547765U Hydraulic support stand column for coal mine
04/16/2014CN203547764U Support frame for tunnel
04/16/2014CN103726859A Inflatable mining rubber bracket
04/09/2014CN203531930U Large flow safety valve
04/09/2014CN203531929U Novel large-flow one-way lock
04/09/2014CN203531928U Face-to-face extensible individual hydraulic supporting column for mines
04/09/2014CN103711505A Position adjustment device for operation valve group of hydraulic support in low-coal seam
04/02/2014CN203515622U Connecting structure of hydraulic support liquid inlet and return three-way components for coal mine
04/02/2014CN203515621U Hydraulic support main control valve protection device
04/02/2014CN203515620U Hydraulic control two-way lock used for coal mine hydraulic support
04/02/2014CN203515619U Pushing one-way lock with rated flow being 200 L/min
04/02/2014CN203515618U One-way lock with rated flow being 125 L/min
04/02/2014CN203515617U 400L/min reversing valve used for coal mine hydraulic support
04/02/2014CN203515616U 500L/min safety valve used for coal mine hydraulic support
04/02/2014CN203515615U Continuously progressive pressure transfer retractable device for steel tube concrete support
04/02/2014CN203515614U Steel tube concrete support pressure transfer component
04/02/2014CN203515613U Structure for connecting ejector rods between steel tube concrete supports
04/02/2014CN203515612U Suspension type dual-stage stretchable individual hydraulic prop
04/02/2014CN203515611U Inflated rubber circular-arc metal support
04/02/2014CN203515610U Horseshoe-shaped high-strength composite support
04/02/2014CN103696788A Abandoned roadway timbering device and construction method of fully mechanized coal mining face passed through abandoned roadway
04/02/2014CN102536275B Manual reversing main operation valve for hydraulic support of thin seam
04/02/2014CN102493824B Retractable trapezoid support with cushion blocks
04/02/2014CN102435431B Comprehensive test platform for valve used for mining hydraulic bracket
04/02/2014CN102337910B Fast assembling and disassembling device for support carrier
03/2014
03/27/2014WO2014045204A1 Fluid filled support container containment
03/26/2014CN203499707U Quick hoisting, loading and unloading device for hydraulic bracket creeper for underground coal mine
03/26/2014CN203499706U Valve element assembly of reversing valve for coal mine fully-mechanized coal mining hydraulic support
03/26/2014CN203499705U Double-valve-core hydraulic control one-way valve and hydraulic support system
03/26/2014CN203499704U Scraping device of coal mining shield support
03/26/2014CN203499703U Secure U-shaped clamp cable
03/26/2014CN103670464A Roadway interlocking reinforced type U-shaped shed
03/26/2014CN103670462A Fully-mechanized coal mining support down-pass device and down-pass method
03/26/2014CN103670461A Anti-misoperation device of operating valve of coal mine fully-mechanized coal mining hydraulic support
03/26/2014CN103670460A Hydraulic sublevel caving coal support base with moving-before-sliding device
03/26/2014CN103670459A Hydraulic supporting column pressure real-time monitor for mining
03/26/2014CN103670458A Fully mechanized coal-mining and fully mechanized caving face hydraulic support
03/26/2014CN103670457A Real-time monitoring system for hydraulic support on coal mine fully mechanized working face
03/26/2014CN103670456A Mining hydraulic prop for magnetic liquid sealing
03/26/2014CN103670455A Steel-bar net enclosure for high-water-content material packed column
03/26/2014CN102505948B Foam concrete tank-type pier column for supporting in coal mines and preparation method thereof
03/19/2014CN203488195U Hydraulic support detaching backing plate
03/19/2014CN203488194U Plug-in mounted type one-way lock
03/19/2014CN203488193U Hydraulic control check valve
03/19/2014CN103644444A Stand column lubricating device
03/19/2014CN103643975A Supporting unit for steeply-inclined medium-thickness coal seam flexibility shielding system
03/13/2014US20140072374 Support prop
03/12/2014CN203476362U Hydraulic support with secondary side wall protection mechanism
03/12/2014CN203476361U Filter liquid injection gun
03/12/2014CN203476360U Push rod of hydraulic support
03/12/2014CN203476359U Novel small-flow reversing valve
03/12/2014CN203476358U Anti-flying-out valve sleeve of three-way valve of single hydraulic prop
03/12/2014CN203476357U Single hydraulic prop pressure maintaining device
03/12/2014CN203476356U Portable single hydraulic prop type liquid supply device
03/12/2014CN203476355U Hollow pipe concrete support
03/12/2014CN203476354U Underground excavation engineering major structure
03/12/2014CN103628902A Large-bore upright without local weld joint structure
03/12/2014CN103628901A Mining diameter-expanding type anti-impact single hydraulic bracket
03/12/2014CN103628900A Triangular cross-section beam and circular ring combined yielding support
03/06/2014US20140064859 Telescopic mine roof support
03/05/2014CN203463134U Manual control valve of hydraulic support for fully-mechanized coal mining face
03/05/2014CN203463121U Plug-in type conical surface rigidity seal hydraulic control one-way valve
03/05/2014CN203463120U Mining intrinsically-safe electric-hydraulic control reversing valve
03/05/2014CN203463119U Cage-type rock-burst-preventing assembly used in mine
03/05/2014CN203463118U Shock-resisting stretchable vertical column for hydraulic bracket
03/05/2014CN203463117U Triple stretchable vertical column for hydraulic bracket
03/05/2014CN103615271A Protective device for stand column
03/05/2014CN103615270A Single hydraulic prop hydraulic pressure three-purpose valve
03/05/2014CN103615269A Improved soft rock roadway integral tunneling protection support
03/05/2014CN103615268A Mine piston type clean water hydraulic prop
03/05/2014CN103615267A Guide sleeve of hydraulic support stand column and machining method
02/2014
02/26/2014CN203455119U Top board pressure sensor strain-type accessory
02/26/2014CN203452812U Hydraulic steering platform
02/26/2014CN203452811U U-shaped clamp
02/26/2014CN203452810U Base valve, double-telescopic stand column, hydraulic support and engineering machine
02/26/2014CN203452809U Pedal plate and hydraulic support
02/26/2014CN203452808U Hollow pipe body concrete support
02/26/2014CN103603682A Roof supporting method applicable to cutting, drifting and cemented filling mining
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