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33results about How to "Eliminate major security risks" patented technology

Parking brake redundancy monitor and diagnosis system and control method of same

ActiveCN106627555AReduce the chance of being lateImprove reliabilityBrake safety systemsNetwork connectionEngineering
The invention discloses a parking brake redundancymonitor system, including two braking electronic control units and two pressure sensors. A parking brake cylinder line is provided with a first pressure sensor and a second pressure sensor which directly detect the pressure of the parking brake cylinder line. The first pressure sensor is connected with a first braking electronic control unit. The first braking electronic control unit collects the pressure information of the first pressure sensor to judge parking brake condition and analyses the first pressure sensor condition. The second pressure sensor is connected with the second braking electronic control unit. The second braking electronic control unit collects the pressure information of the second pressure sensor to judge parking brake condition and analyses the second pressure sensor condition. With network connection and system control, the two braking electronic control units have the advantages of reliably monitoring parking brake conditions and triggering emergency braking to park with safety and accuracy.
Owner:CRRC CHANGCHUN RAILWAY VEHICLES CO LTD

Mandatory continuous feeder for bulk material of mixed grease and glue

The invention provides a mandatory continuous feeder for a bulk material of mixed grease and glue. The mandatory continuous feeder comprises a radially communicated feeding container and a reducer driven by a motor. A feeding screw shaft (15) connected with a rotary shaft of the reducer is vertically connected with an anti-bridging agitating blade (5) fixedly and extends into a feed inlet (16) of a spiral forming machine (9) vertically. A spiral feeding and spinning feeder (6) consisting of upper, middle and lower layers of spiral feeding and spinning blades in different structures is arranged on the circumference of a rod body at a cone-shaped end of the feeding screw shaft. According to a middle layer screw blade (19) provided with a radial opened diffluent trough (21), one the one hand, materials are in a screw feeding state, and on the other hand, part of materials returns upward through the opening of the blade diffluent trough so as to exhaust and divide the materials. The lower layer screw blade feeds the materials to the feed inlet of a screw press continuously. The mandatory continuous feeder for the bulk material of mixed grease and glue provided by the invention is safe, feeds materials to the screw press stably, does not clot and block, and feeds uniformly. The quality stability in the forming process of a mixed grease blasting explosive is improved.
Owner:LUZHOU NORTH CHEM IND

Hydraulic grab driven by diesel through wireless remote control

The invention relates to a hydraulic grab driven by a diesel through wireless remote control. The hydraulic grab comprises a hoisting ring, a shackle, an outer shell, a through girder, two bucket bodies, a hydraulic device and a wireless remote control device, wherein the hydraulic device is provided with a hydraulic pump, an oil cylinder, and a control valve block system, the oil cylinder is connected with the hydraulic pump by a solenoid valve and is driven by the hydraulic pump through power provided by the diesel connected with the hydraulic pump, and two ends of a connecting rod are respectively connected at the inner side edges of the two bucket bodies through pin rolls so as to play a position limiting and protecting role in closing and opening of the grab. The grab can be remotely controlled to grab cargoes or when no power is available, the oil cylinder can be driven to close or open the grab to grab the cargoes, and the hydraulic grab is applicable to poor working environments, can work regardless of high frequency service conditions, is long in work service life, improves the efficiency of enterprises, overcomes potential safety hazards of the production and is convenient to operate.
Owner:SHANGHAI GUANBO MACHINERY EQUIP

Communication interface and communication device and method of direct-current control system and stability control device,

The embodiment of the invention relates to a communication interface and a communication device and method of a direct-current control system and a stability control device, which are applied to a high-voltage direct-current power transmission system, and the high-voltage direct-current power transmission system comprises two pole controllers of a converter station pole 1 and a converter station pole 2, the stability control device and a direct-current station controller. The communication device of the direct current control system and the stability control device comprises a first communication unit, a second communication unit and a control unit. By adding the second communication unit, the control unit controls the second communication unit to operate when abnormal locking signals cannot be sent to the stability control device after a pole control dual system of the high-voltage direct-current power transmission system is shut down, so that the direct-current station controller transmits pole control abnormal locking information to the stability control device, and the stability control device can correctly and reliably act on an outlet; safe and stable operation of a power grid is guaranteed, the technical problem that abnormal locking signals cannot be sent to a stability control device after two pole controllers in an existing high-voltage direct-current power transmission project are shut down is solved, and major potential safety hazards possibly caused by refusal of the stability control device are eliminated.
Owner:GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD +1

Municipal anti-theft manhole cover

The invention relates to the technical field of municipal engineering devices, and provides a municipal anti-theft manhole cover. The manhole cover comprises a cover body, wherein the cover body is arranged on a base; drain holes, which are used for conducting drainage, are arranged in the cover body; a locking mechanism, by which the cover body is locked on the base, is arranged on the cover body; an opening component, which is used for opening the locking mechanism, is arranged at the bottom of the cover body; and the opening component is arranged between the cover body and the base. The cover body can be stably fixed to the base under a locking effect of the locking mechanism, so that a problem that the manhole cover can be stolen easily can be solved, and serious injuries on pedestrians and vehicles due to the absence of the manhole cover can be effectively prevented.
Owner:广东旺边实业有限公司

Coke oven heating system and exchange heating control method thereof

The invention discloses a coke oven heating system, which is characterized in that limit switches are respectively arranged at motion limit positions at two ends of a piston rod of each hydraulic oilcylinder; piston rod flanges are arranged at two ends of the piston rod; when the piston rod flange moves to a limit position, the piston rod flange triggers the corresponding limit switch; and the limit switch obtains the information of the actual state of the piston motion of the hydraulic oil cylinder and sends the information to a control unit of the coke oven heating system. The invention further discloses an exchange heating control method of the heating system. According to the invention, hydraulic faults are analyzed and diagnosed by optimizing safety linkage and adding the oil path pressure detection device, so that the major potential safety hazard of the heating system when the hydraulic system fails in the prior art is eliminated, the hydraulic faults of the gas heating systemcan be identified in time, and safe shutdown is completed. Therefore, the safety performance of the coke oven heating system is effectively improved.
Owner:MAANSHAN IRON & STEEL CO LTD

Device for eliminating rail gnawing of trolley of large-size bridge crane

ActiveCN106219402AEliminates friction gnawing on railsEnsure safetyTravelling gearOverhead craneLarge size
The invention relates to a device for eliminating rail gnawing of a trolley of a large-size bridge crane. An additional disc spring supporting arm is arranged at the bottom of an existing trolley of the bridge crane. The device comprises a main body frame, the disc spring supporting arms, rolling balls and disc springs; a disc spring shell is installed on the periphery of each disc spring; the main body frame is fixedly connected with a crane trolley bottom connector; the two ends of the crane trolley bottom connector are provided with trolley wheels; the trolley wheels are arranged on trolley rails which are arranged on girders of the bridge crane; the two disc spring supporting arms are fixedly arranged on the two horizontal sides of the lower end of the main body frame; each rolling ball is installed at the end of the corresponding disc spring supporting arm; and a circular-groove-shaped guide rail is arranged between each rolling ball and the corresponding girder of the bridge crane. The device for eliminating rail gnawing of the trolley of the large-size bridge crane has the beneficial effects that the structure is simple, and operation is stable; and fraction and rail gnawing between the trolley wheels and the guide rails is eliminated, meanwhile, serious potential safety hazards cased by rail gnawing of the trolley is eliminated, and the safety of operation of the device and the personnel security are effectively ensured.
Owner:KOCEL MACHINE

A device for eliminating rail gnawing by trolleys of large bridge cranes

ActiveCN106219402BEliminates friction gnawing on railsEnsure safetyTravelling gearEngineeringOverhead crane
The invention relates to a device for eliminating rail gnawing of a trolley of a large-size bridge crane. An additional disc spring supporting arm is arranged at the bottom of an existing trolley of the bridge crane. The device comprises a main body frame, the disc spring supporting arms, rolling balls and disc springs; a disc spring shell is installed on the periphery of each disc spring; the main body frame is fixedly connected with a crane trolley bottom connector; the two ends of the crane trolley bottom connector are provided with trolley wheels; the trolley wheels are arranged on trolley rails which are arranged on girders of the bridge crane; the two disc spring supporting arms are fixedly arranged on the two horizontal sides of the lower end of the main body frame; each rolling ball is installed at the end of the corresponding disc spring supporting arm; and a circular-groove-shaped guide rail is arranged between each rolling ball and the corresponding girder of the bridge crane. The device for eliminating rail gnawing of the trolley of the large-size bridge crane has the beneficial effects that the structure is simple, and operation is stable; and fraction and rail gnawing between the trolley wheels and the guide rails is eliminated, meanwhile, serious potential safety hazards cased by rail gnawing of the trolley is eliminated, and the safety of operation of the device and the personnel security are effectively ensured.
Owner:KOCEL MACHINE

A kind of low-density ammonium oil explosives and its preparation method and application

The invention provides a low-density ammonium nitrate fuel oil explosive, and a preparation method and application of the low-density ammonium nitrate fuel oil explosive. The low-density ammonium nitrate fuel oil explosive is prepared from the following raw materials in parts by weight: 86 to 90.7 parts of porous granulated ammonium nitrate, 4 to 9 parts of perlite particles and 5.0 to 5.3 parts of diesel oil. The preparation method comprises the following steps: (1) preparing the porous granulated ammonium nitrate, the perlite particles and the diesel oil in parts by weight; (2) uniformly mixing the porous granulated ammonium nitrate, the perlite particles and the diesel oil, thus obtaining the low-density ammonium nitrate fuel oil explosive. The application is characterized by applying the low-density ammonium nitrate fuel oil explosive in open-pit coal step loose blasting. The low-density ammonium nitrate fuel oil explosive provided by the invention is low in cost, small in blasting unit consumption, good in blasting effect and beneficial for increasing the block coal rate and increasing the economic benefit. The preparation method provided by the invention is simple and easy to operate and is also matched with conditions of an open-pit coal mine. According to the application of the low-density ammonium nitrate fuel oil explosive in the open-pit coal step loose blasting, disclosed by the invention, secondary charging is avoided, the probability that blast holes and blasting devices are crushed by an explosive truck is reduced, the blasting quality is favorably increased, and major hidden dangers are removed.
Owner:CHINA SHENHUA ENERGY CO LTD +1

Double-sided continuous polishing production equipment for saw chain guide plate

The invention discloses double-sided continuous polishing production equipment for a saw chain guide plate. The double-sided continuous polishing production equipment comprises an automatic feeding machine, an A-side polishing machine, an automatic turnover machine, a B-side polishing machine and a cleaning machine, wherein the automatic feeding machine conveys the saw chain guide plate to the A-side polishing machine; the A-side polishing machine polishes an A side of the saw chain guide plate; the automatic turnover machine turns over and conveys the saw chain guide plate to the B-side polishing machine; the B-side polishing machine polishes the B side of the saw chain guide plate; the cleaning machine cleans the saw chain guide plate; and the A-side polishing machine and the B-side polishing machine adopts water grinding type polishing. The double-sided continuous polishing production equipment can realize automatic feeding and automatic turnover, so that continuous A-side polishing, B-side polishing and washing can be accomplished through the saw chain guide plate, and thus, efficiency is improved.
Owner:浙江辉煌三联实业股份有限公司

Wet process desulphurization and dust removal device and wet process desulphurization and dust removal method using same

The invention relates to a wet process desulphurization dust removal device, which comprises a comprehensive tower, a heat exchanger mounted at the top end of the comprehensive tower, a reverse spraypipe connected with the heat exchanger and the comprehensive tower and arranged in a communicating manner, a rapid solid-liquid separator matched with the comprehensive tower for use, an air cooling calandria matched with the rapid solid-liquid separator for use, and a cooling tower matched with the air cooling calandria for use. According to the invention, the device is reasonable in structure and good in using effect, integrates flue gas purification, desulfurization, dust removal, water control and smoke abatement, and achieves high-efficiency desulfurization and dust removal, the emissionindex of the device can completely meet and exceed the ultra-clean emission requirement implemented at present, water resources used for smoke control can be recovered so as to recycle the water resource, the huge condition of flue gas desulfurization and dust removal equipment is changed, the occupied area is small, the equipment capital investment is reduced, energy-saving operation can be achieved, the cost is saved, and popularization is worth.
Owner:浙江丽水澄天环保科技有限公司 +1

Method for caving large goaf of underground mine and eliminating goaf

The invention discloses a method for caving a large goaf of an underground mine and eliminating the goaf. The method comprises the following steps: dividing 2-6 operation areas or explosion areas in a goaf surrounding rock (3) on the periphery of the goaf (1); 3-6 deep hole drilling chambers (9) are arranged in the goaf surrounding rock (3) in each operation area or explosion area, and the deep hole drilling chambers (9) of all layers are communicated through chamber connection wells (10); the method comprises the following steps: arranging a roadway project, namely a connection gate way (6), a connection inclined shaft (7) or a connection raise, between an existing project and a deep hole drilling chamber (9); a caving horizontal deep hole (12) is formed in the deep hole drilling chamber (9) on the middle-lower layer, and a horizontal and upward fan-shaped cutting weakening deep hole (13) is formed in the deep hole drilling chamber (9) on the upper layer. According to the method, the underground engineering amount, the explosive amount of deep hole blasting and the harm caused by air shock waves brought by large-area caving of the goaf are reduced, the construction cost is reduced, and potential safety hazards existing in the large goaf are eliminated.
Owner:SINOSTEEL MAANSHAN INST OF MINING RES +2

Construction method for preventing ramp for disabled people outside residential building from sinking in constructional engineering

The invention discloses a construction method for preventing a ramp for the disabled people outside a residential building from sinking in constructional engineering. The construction method for preventing the ramp for the disabled people outside the residential building from sinking in the constructional engineering comprises the following steps that 1, a frame structure foundation is installed on the top face of a garage top plate waterproof protection layer, and concrete pouring is conducted; 2, a vertical supporting frame is installed on the frame structure foundation, and the concrete pouring is conducted; 3, a top supporting frame is installed on the vertical supporting frame, and the concrete pouring is conducted; and 4, a ramp structure for the disabled people outside the residential building is constructed. During foundation treatment, construction is convenient and simple, and a large amount of mechanical input and labor input are saved; after a frame structure is formed, the transmission mode of an original structural load is changed, the load of the ramp structure for the disabled people is transmitted to an underground garage top plate through the frame structure, the quality problems that the ramp structure for the disabled people outside the residential building sinks and cracks are effectively solved, and major potential safety hazards existing at the position are eliminated.
Owner:北京万兴建筑集团有限公司

Method for preventing blast-furnace tuyere sleeve from sinking

PendingCN112553393APrevent sinkingElimination of off-wind situationsTuyeresSlagEngineering
The invention relates to the technical field of smelting, in particular to a method for preventing a tuyere sleeve of a blast furnace from sinking. The method comprises the following steps of increasing the alkali discharge rate of an iron notch: specifically controlling the quaternary alkalinity of slag to be 0.95-0.98 times; increasing the contact area between a tuyere small sleeve and a tuyeremiddle sleeve; and adding fixing supports at the tuyere position: specifically arranging two supporting frames on the outer side of a tuyere large sleeve, and fixedly connecting the two supporting frames with a furnace shell around the tuyere; fixedly connecting a connecting frame between the two supporting frames, and extending to the position below the tuyere small sleeve; and fixedly installingan arc-shaped bracket on the connecting frame, and supporting the arc-shaped bracket below the tuyere small sleeve. The method provided by the invention is low in cost and simple and effective in operation, and potential safety hazards caused by sinking of the tuyere small sleeve are avoided.
Owner:YANCHENG LIANXIN IRON & STEEL CO LTD

Method for heating pyridine salt B3 to prompt chlorination reaction

The invention relates to a method for heating pyridine salt B3 to prompt a chlorination reaction. The method is characterized in that: an electric heater and a chlorination reaction kettle are connected through a pipeline to form a closed loop; a pipeline connecting the chlorination reaction kettle to the electric heater is connected to an emptying groove through a branch pipeline; the method comprises the following steps: (1) taking dichloromethane as a solvent and sufficiently dissolving a 3-methoxy-2-methyl-4-pyridone dry product in an amination work section, so as to obtain a solution; dropwise adding phosphorus oxychloride into the solution; (2) injecting heat-conducting oil into a heat-conducting oil heating system, and keeping oil pressure at 0.2-0.4 MPa and oil temperature at 90 DEG C in order to ensure that an oil path passes the chlorination reaction kettle smoothly; heating the chlorination reaction kettle to 80-85 DEG C and refluxing and carrying out heat insulation to react for 8 hours; and (3) recycling excessive dichloromethane in a temperature raising and heat insulation process, and conveying a generated product into a decompression and recycling working section. The method provided by the invention has the advantages that the heat-conducting oil is stable in property and can effectively avoid sudden explosion accidents; a complete reaction can be ensured and the reaction yield is maximized; and the energy loss rate is low, scale is not formed after equipment is used for a long period and the heat exchange efficiency is higher.
Owner:ANHUI JINGHE IND

Current leakage protection plug

The invention relates to a current leakage protection plug, which comprises a shell. The shell is provided with a reset button and a testing button, a circuit board is arranged in the shell, the circuit board is provided with a live wire stationary contact and a zero wire stationary contact, the live wire stationary contact and the zero wire stationary contact are electrically connected with a live wire pin and a zero wire pin on the shell through wires, the shell is provided with a ground wire pin, the ground wire pin is provided with a ground wire stationary contact, the ground wire stationary contact is provided with a ground wire stationary contact, a live wire spring plate, a zero wire spring plate and a ground wire spring plate are arranged in the shell and are connected with an output power cord, the live wire spring plate, the zero wire spring plate and the ground wire spring plate are correspondingly provided with a live wire dynamic contact, a zero wire dynamic contact and a ground wire dynamic contact which are contacted with the live wire stationary contact, the zero wire stationary contact and the ground wire stationary contact, a tripping device is also arranged in the shell, and the ground wire spring plate is provided with an elastic ejection component which can eject the live wire dynamic spring plate, the zero wire dynamic spring plate and the ground wire dynamic spring plate to be away from the stationary contacts in testing or current leakage. The invention aims to provide a current leakage protection plug with high safety and simple and reliable structure.
Owner:ZHONGSHAN TO HEAD ELECTRICAL

Saw chain guide double-sided continuous polishing production equipment

The invention discloses a saw chain guide plate double-sided continuous polishing production equipment, which includes an automatic feeder, an A-side polishing machine, an automatic turning machine, a B-side polisher, and a cleaning machine. The automatic feeder transports the saw chain guide plate to the A-side Polishing machine, the A side polishing machine grinds the A side of the saw chain guide plate, the automatic turning machine turns over the saw chain guide plate and then transports it to the B side polishing machine, and the B side polishing machine grinds the B side of the saw chain guide plate Grinding is carried out, and the cleaning machine cleans the polished saw chain guide plate, and the surface A polishing machine and the surface B polishing machine adopt water grinding polishing. The invention can realize automatic material feeding and automatic flipping, so that the saw chain guide plate can complete continuous surface A polishing, surface B polishing and water washing, and the efficiency is improved.
Owner:浙江辉煌三联实业股份有限公司

More safe water heater

The invention relates to a more safe water heater which consists of an electric heat source body or other heat source bodies, a heating container adopting a high volatile substance as a heat medium and containing a water heat exchanger and a safety device mounted at the highest position of the heating container and communicated with the interior of the heating container. The more safe water heater utilizes a safety valve containing a pressure switch and a condensation recovery device which are communicated with the interior of the heating container and mounted on the heating container of the water heater, thereby leading the high volatile substance which is taken as the heat medium for heating water in the water heat exchanger, not only keeping the advantage of improving the heat efficiency, but also eliminating the major potential safety problem of extraordinary pressure.
Owner:赵联众

A parking brake redundant monitoring and diagnosis system and its control method

ActiveCN106627555BReduce the chance of being lateImprove reliabilityBrake safety systemsNetwork connectionParking brake
The invention discloses a parking brake redundancymonitor system, including two braking electronic control units and two pressure sensors. A parking brake cylinder line is provided with a first pressure sensor and a second pressure sensor which directly detect the pressure of the parking brake cylinder line. The first pressure sensor is connected with a first braking electronic control unit. The first braking electronic control unit collects the pressure information of the first pressure sensor to judge parking brake condition and analyses the first pressure sensor condition. The second pressure sensor is connected with the second braking electronic control unit. The second braking electronic control unit collects the pressure information of the second pressure sensor to judge parking brake condition and analyses the second pressure sensor condition. With network connection and system control, the two braking electronic control units have the advantages of reliably monitoring parking brake conditions and triggering emergency braking to park with safety and accuracy.
Owner:CRRC CHANGCHUN RAILWAY VEHICLES CO LTD

Marble heat preservation and decoration integrated plate and wall body structure

The invention provides a marble heat preservation and decoration integrated plate and a wall body structure. According to the scheme, the integrated plate comprises a heat preservation plate, a marble plate, a hanging piece, an adjusting piece and a fixing piece; the adjusting piece comprises an adjusting vertical plate and an adjusting transverse plate, the adjusting transverse plate is installed on a fixing transverse plate and connected with the fixing transverse plate through a connecting piece, the hanging piece comprises a plate body, the plate body is provided with a front plate face and a rear plate face, the front plate face of the plate body is provided with a protruding inserting part, the rear plate face of the plate body is provided with a connecting part, the plate body is installed on the adjusting vertical plate through the connecting part, the heat preservation plate is installed between the adjusting vertical plate and a fixing vertical plate, and the marble plate is installed on the hanging piece. The wall body structure comprises the integrated plate and a base layer wall body, the integrated plate is installed on the outer side of the base layer wall body, and the problems that in the existing wall body construction process, the marble plate subjected to dry hanging cannot be adjusted, the hanging piece cannot adapt to the design thickness of the heat preservation plate, construction is troublesome, and cost is high are solved.
Owner:山东国创节能科技股份有限公司

Marble slab anchoring part

The invention provides a marble slab anchoring part. According to the scheme, the marble slab anchoring part comprises a hanging piece, an adjusting piece and a fixing piece; the adjusting piece comprises an adjusting vertical plate and an adjusting transverse plate, the adjusting transverse plate is installed on a fixing transverse plate and connected with the fixing transverse plate through a connecting piece, and the adjusting piece can move front and back on the fixing piece by adjusting the connecting piece so that the distance between the adjusting vertical plate and a fixing vertical plate can be adjusted; and the hanging piece comprises a plate body, the plate body is provided with a front plate face and a rear plate face, the front plate face of the plate body is provided with a protruding inserting portion, the rear plate face of the plate body is provided with a connecting part, and the plate body is installed on the adjusting vertical plate through the connecting part and can slide left and right along the adjusting vertical plate. The marble slab anchoring part can be firmly fixed to the wall body, a second safety protection barrier is formed, the ultra-thin marble slab is prevented from falling from high altitude to hurt people under the condition that adhesive cement loses efficacy, and major potential safety hazards are eliminated.
Owner:山东国创节能科技股份有限公司

Mixed fat micellar material forced continuous feeding machine

A continuous forced feeding machine for mixed fat micelles proposed by the present invention includes a radially connected feeding container and a reducer driven by a motor (1), and a feeding screw shaft (15) connected to the rotating shaft of the reducer is fixed vertically. The joint-defense bridging mixing blade (5) extends vertically into the feeding port (16) of the screw forming machine (9), and on the circumference of the rod body at the tapered end of the feeding screw shaft, there are three layers consisting of upper, middle and lower layers. The feeding screw spinning feeder (6) composed of feeding screw spinning blades of different structures, and the middle layer screw blade (19) with a radial opening splitter groove (21), while allowing the material to start feeding into the screw feeding state, While letting part of the material return upward through the opening of the vane splitter groove, the material is exhausted and diverted, and the lower continuous spiral blade continuously feeds the material to the feed port of the screw press. The invention safely and stably feeds materials into the screw press machine uniformly, without agglomeration, without material blocking, and evenly feeds materials. The quality stability of the molding process of the mixed fat blasting charge is improved.
Owner:LUZHOU NORTH CHEM IND

A municipal anti-theft manhole cover

The invention relates to the technical field of municipal engineering devices, and provides a municipal anti-theft manhole cover. The manhole cover comprises a cover body, wherein the cover body is arranged on a base; drain holes, which are used for conducting drainage, are arranged in the cover body; a locking mechanism, by which the cover body is locked on the base, is arranged on the cover body; an opening component, which is used for opening the locking mechanism, is arranged at the bottom of the cover body; and the opening component is arranged between the cover body and the base. The cover body can be stably fixed to the base under a locking effect of the locking mechanism, so that a problem that the manhole cover can be stolen easily can be solved, and serious injuries on pedestrians and vehicles due to the absence of the manhole cover can be effectively prevented.
Owner:广东旺边实业有限公司

Structural arrangement suitable for caving treatment of large goaf of underground mine

The invention discloses a structural arrangement suitable for caving treatment of a large goaf of an underground mine. Two to six operation areas or explosion areas are divided in a goaf surrounding rock (3) on the periphery of the goaf (1); 3-6 deep hole drilling chambers (9) are arranged in the goaf surrounding rock (3) in each operation area or explosion area, and the deep hole drilling chambers (9) of all layers are communicated through chamber connection wells (10); the method comprises the following steps: arranging a roadway project, namely a connection gate way (6), a connection inclined shaft (7) or a connection raise, between an existing project and a deep hole drilling chamber (9); a caving horizontal deep hole (12) is formed in the deep hole drilling chamber (9) on the middle-lower layer, and a horizontal and upward fan-shaped cutting weakening deep hole (13) is formed in the deep hole drilling chamber (9) on the upper layer. According to the method, the underground engineering amount, the explosive amount of deep hole blasting and the harm caused by air shock waves brought by large-area caving of the goaf are reduced, the construction cost is reduced, and potential safety hazards existing in the large goaf are eliminated.
Owner:SINOSTEEL MAANSHAN INST OF MINING RES +2

Water supply and drainage pipe head connecting mold, method, product and preparation method

The invention discloses a water supply and drainage pipe head connecting mold, which is used for filling, flattening and butting water supply and drainage pipe heads, and comprises an injection mold detachably connected to the end part of the water supply and drainage pipe head. When the injection mold is connected to the end of the water supply and drainage pipe head, the injection mold is used for injection molding filling and leveling, so that the end of the water supply and drainage pipe head is filled and leveled, and the connector is obtained. And the butt welding mold is arranged on the injection mold, the side wall of the butt welding mold is connected with the side wall of the injection mold, and the butt welding mold is used for conducting butt joint connection on the drainage pipe heads subjected to injection molding through the injection mold. The device is simple in overall structure, convenient to disassemble and suitable for connection of various water supply and drainage pipes of buried water pipes, and has a remarkable practical effect. The invention further discloses a use method of the water supply and drainage pipe head connecting mold, a product based on the water supply and drainage pipe head connecting mold and a preparation method of the product based on the water supply and drainage pipe head connecting mold.
Owner:刘现海

The Construction Method of Preventing the Sinking of the Ramp for the Disabled Outside the Residential Building in Construction Engineering

A construction method for preventing the sinking of the ramp for the disabled outside the residential building in a construction project of the present invention comprises the following steps: step 1, installing a frame structure foundation on the top surface of the waterproof protection layer of the garage roof, and pouring concrete; step 2, Install the vertical support frame on the frame structure foundation, and perform concrete pouring; step 3, install the top support frame on the vertical support frame, and perform concrete pouring; step 4, carry out the construction of the ramp structure for the disabled outside the residential building. During the foundation treatment, the construction is convenient and simple, saving a lot of machinery and labor input; after the frame structure is formed, the original structural load transmission mode is changed, and the load of the ramp structure for the disabled is transmitted to the underground garage through the frame structure The top plate effectively eliminates the quality problems of sinking and structural cracking of the ramp structure for the disabled outside the residential building, and eliminates the major safety hazards that exist here.
Owner:北京万兴建筑集团有限公司
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