101results about How to "Reduce post-maintenance" patented technology

The invention provides an in-situ self-sustaining contaminated soil restoring device by simulating the capillary phenomenon and the transpiration function of a plant and a method for restoring soil by utilizing the device. The restoring device comprises the following members: a main body, filling materials, an evaporator and accessories, wherein the main body is a hollow pipe fitting which is tightly filled with the filling materials; the filling materials are supported by depending on the accessories; the evaporator is arranged at the top end of the main body pipe fitting; the accessories are mainly of supporting materials for mounting other members. The specification of the restoring device is selected and the distribution density and depth are selected according to soil contamination conditions, and then the restoring device is inserted into the soil, so that contaminants in the soil are driven to move by utilizing the capillarity phenomenon and the transpiration function of the restoring device so as to be transferred into the restoring device. Thus, the contaminants in the soil are effectively removed.

The invention discloses a prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck and a construction method. The prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck comprises a semiclosed FRP groove and concrete inside the FRP groove, wherein the bottom surface and two side surfaces of the concrete are wrapped by the FRP groove to form the combined panel, a transverse through reinforcing steel bar reserved tunnel is formed in a transverse setting position of the combined panel, a transverse prestress reinforcing steel bar is arranged in the reinforcing steel bar reserved tunnel to connect a plurality of FRP-concrete combined panel prefabricated components to form an integral bridge panel structure in a needed size. The construction method comprises the steps: firstly producing the semiclosed FRP groove; arranging an FRP rib and an embedded corrugated pipe, and fixing the FRP rib and the embedded corrugated pipe; pouring concrete; splicing a plurality of prefabricated FRP-concrete combined deck components into a whole by utilizing the prestress after the strength of the concrete reaches the requirement. The factorization prefabrication and on-situ assembling of the FRP combined bridge deck are realized, the structure is simple, and the construction is convenient.

The invention discloses a double-closed-loop testing device for an intelligent substation. The double-closed-loop testing device is characterized by comprising a main control board unit, a digital / analog conversion unit, a power amplification unit, a feedback loop switching unit, an analog / digital conversion unit, a liquid crystal display unit, a network communication unit and a power supplying unit which provides different voltages for various units of the device. The device is combined with an upper computer software platform and a master clock, and the connecting reliability of secondary equipment of the substation such as a merging unit, a network switch, a relay protection device, a measurement control device, a safety control device, a metering device and a background monitoring system and the configuration accuracy can be tested. The device is provided with two closed loops, wherein by one closed loop for correcting zero drift of the units of the device, the degree of automation is increased, the workload of debugging personnel for the device is reduced, the maintenance of the device is reduced, and the field debugging personnel of the intelligent substation can correct the system error before an experiment; and by the other closed loop, the output quantity of the double-closed-loop testing device can be monitored in real time, and the output waveform in a steady state is corrected according to a detection value.

The invention relates to a bagged material loading system which comprises a laser vision system, a conveying system, a robot system and a control system. The robot system comprises a six-axis industrial robot, a walking guide rail and a robot clamp arranged on the six-axis industrial robot. The industrial robot is arranged on the walking guide rail and is arranged at the tail end of the conveyingsystem for loading a bagged material on the conveying system. The laser vision system comprises two line laser sensors mounted on a ground fixed bracket and two point laser sensors mounted on the clamp at the six-axis tail end of the robot, the line laser sensors and the point laser sensors are in communication connection to the control system, and the control system receives information of the laser vision system and controls the conveying system and the robot system to be linked to load the material automatically. The bagged material loading system can load and stack the material automatically, so that the demand on manual control is simplified. The system is compact in structure, small in occupied spaced, high in degree of intelligence and high in adaptability.

The invention relates to a grinding machine for grinding of a ball valve ball body. The grinding machine for grinding of the ball valve ball body is characterized in that the grinding machine for grinding of the ball valve ball body comprises a machine frame, a power supporting plate, a gear box, a driving motor, a tailstock supporting plate and a tailstock clamping mechanism; a ball body drivingshaft and a grinding power shaft are installed in the gear box; a telescopic shaft is connected to the end portion of the ball body driving shaft, a driving wheel is installed at the upper end portionof the grinding power shaft, a cantilever beam is arranged on the upper portion of a supporting sleeve, and a grinding shaft is installed at the end portion of the cantilever beam; a driven wheel isinstalled on the upper portion of the grinding shaft of the cantilever beam, and a transmission element is installed between the driving wheel and the driven wheel; and a suspension frame is installedat the lower end of the grinding shaft, a telescopic arm is installed on the suspension frame in a penetrating mode, a rocker is installed at the one end of the telescopic arm in the vertical direction in a penetrating mode, a grinding rack is connected to the lower end of the rocker, and a grinding tool of a valve seat sealing surface is arranged at the lower end of the grinding rack. The grinding machine for grinding of the ball valve ball body has the advantages that the conception is novel, the use is convenient, the machining efficiency and quality of the ball body are improved, good sealing performance is ensured after the grinding machine is matched with the valve seat, and the grinding difficulty of a ball body workpiece is reduced.

The invention discloses a preparation method of modified mixed basalt fiber concrete, the method comprises the following steps: soaking basalt fiber in excessive sulfuric acid, discharging sulfuric acid, and then sequentially adding cyclohexanone peroxide, natural aldehyde, high-curling high-wet-modulus viscose and dimethylaminoethyl acrylate for stirring; then adding a titanate coupling agent, and stirring to obtain modified mixed fiber; putting crushed stones and sand into a stirrer for stirring; adding cement, coal ash and mineral powder for stirring; mixing a water reducer, water and Diethylene Triamine Penta (Methylene Phosphonic Acid) into a stirrer to be stirred so as to obtain a concrete matrix; uniformly spreading the modified mixed basalt fiber into the concrete matrix and stirring so as to obtain the modified mixed basalt fiber concrete. The concrete has excellent toughness, crack resistance, mechanical property, corrosion resistance and high temperature resistance and longer service life.

The invention discloses a photovoltaic power generation bracket for improving solar energy conversion rate and an installation and construction method thereof, including a solar panel, a bracket body,a scraper and a drive unit, A support body is inclined with respect to the ground, A plurality of rectangular arrays of the solar cell panels are tiled and arranged on the bracket main body, A main body of that bracket is arranged on a drive assembly, the scraper is arranged above the solar cell panel in an inclined direction perpendicular to the bracket main body, and the scraper moves reciprocally along the inclined direction of the bracket main body through the driving assembly, and the scraper is added above the solar cell panel to clean the upper surface of the solar cell panel, reduce dust and other sundries on the solar cell panel, and ensure the conversion rate of the solar cell panel.

The invention provides an intelligent fire-fighting data visual monitoring system and a monitoring method thereof, and relates to the technical field of fire-fighting safety. The system comprises a data parsing module; a data model comprising an equipment model and an interface model; and a smart screen. The method comprises the following steps: S1, analyzing and classifying specific contents of the fire-fighting equipment in response to a received fire-fighting equipment state message; S2, monitoring the classified fire-fighting equipment state messages in response to the classified fire-fighting equipment state messages, and triggering early warning when the state messages are changed or abnormal; S3, updating the state of the fire-fighting equipment in response to the early warning; andS4, displaying the message processed in the step S3. According to the invention, through a remote multi-dimensional three-dimensional visual monitoring technology, real-time monitoring of the state of the fire-fighting equipment is realized; a data model analysis technology is used for analyzing the life cycle and the state information of the fire-fighting equipment in real time, safety diagnosis, intelligent early warning and accurate maintenance of the fire-fighting equipment are achieved, and the fire-fighting guarantee cost is reduced.

The embodiment of the invention discloses a driving shaft identification device and method. The device is composed of a laser distance measuring sensor and a data processing module which are installedunder the road. The laser distance measuring sensor scans the passing object in real time and transmits the scanning data to the data processing module. The data processing module identifies the driving shaft of the vehicle according to the scanning data. According to the device, the object passing the measuring position is detected in real time through the laser distance measuring sensor so thatthe efficiency is high, the accuracy is high, the environmental suitability is great and later maintenance is less. Meanwhile, comprehensive detection of the object passing the area of the scanning laser above the laser distance measuring sensor can be realized by the device so that the detection accuracy is high, and the problems of low manual detection efficiency, poor video monitoring adaptability and high later maintenance workload of the contact detection mode in the prior art can be solved.

The invention relates to a road dynamic wireless charging system based on solar energy photovoltaic and energy storage integration. A layered structure design is adopted, and each layer keeps relatively independent installation and debugging, and the layers are connected through interfaces. The road dynamic wireless charging system based on the solar energy photovoltaic and energy storage integration comprises a system control layer, a power switching layer, a power transmitting layer, a supporting structure layer, a receiving and setting layer and a load detection and control layer, wherein the system control layer is used for receiving and forwarding data of a vehicle-mounted main control device, the power switching layer is used for detecting the position of the power transmitting layerand controlling corresponding power to switch to a working state at the same time, the power transmitting layer is used for transmitting power supply power; the supporting structure layer is used forsupporting a vehicle to carry heavy loads and realizing high-power coupling wireless charging under different working conditions of moving loads; the receiving and setting layer supplies power for the battery load of the electric vehicle in running; and the load detection and control layer is used for ensuring power transmission. A microgrid system composed of photovoltaic and energy storage provides clean power for power equipment on the expressway, and the defects of late maintenance and unstable work brought by traditional power laying are greatly overcome.

The invention discloses an ultrasonic transducer with a vibration reduction function. The ultrasonic transducer with the vibration reduction function comprises a front cover plate and a rear cover plate. A plurality of ceramic wafers and electrodes are arranged between the front cover plate and the rear cover plate in a spaced mode. The ultrasonic transducer with the vibration reduction function is characterized in that a double-groove structure is arranged at the joint of the front cover plate and comprises an inner groove and an outer groove; the inner groove is a blind groove, the outer groove is also a blind groove, the inner groove and the outer groove are open in opposite directions, and a vibration reduction wall is arranged between the inner groove and the outer groove; and threads are arranged outside the double-groove structure. According to the ultrasonic transducer with the vibration reduction function, the thicknesses of the bottoms of the inner groove and the outer groove in the joint are smaller than 1 mm, and thus vibration is weak; the vibration reduction wall between the outer groove and the inner groove of a flange has the vibration reduction function and can eliminate vibration on the joint, errors caused by vibration are avoided, and equipment precision is improved; and the ultrasonic transducer is connected with an external component through the threads outside the flange, the situation that damage is caused due to pressure when a rubber ring is used, and consequentially up-down or left-right errors are caused is avoided, and equipment precision is improved.

The invention relates to the field of rail transit, and discloses a straddle type monorail track beam, a manufacturing method of the straddle type monorail track beam and a monorail system. The straddle type monorail track beam includes a plurality of bellows and a plurality of steel strands; the bellows are pre-embedded in a top plate of the track beam, and the ends of the bellows are staggeredlyarranged at the top plate of the track beam, so that the ends of the bellows are not on the same cross section of the track beam; the steel strands are interspersed in the adjacent bellows of the track beam for connecting wet joints at the adjacent span track beam and bridge piers; the ends of the steel strands are respectively anchored to the top surface of the adjacent span track beam. The straddle type monorail track beam can effectively resist the tensile stress generated by the negative bending moment at the top plate, the top plate can be effectively prevented from cracking, the rainwater is prevented from invading and damaging a beam body, and the service life of the track beam is prolonged.

The invention discloses a vibration isolation and reduction bracket for cable structures, comprising a support member (1), a vibration isolator (3), a hydraulic vibration reducer (6), a spring (7), a regulating nut (5), and a connecting pedestal (4). An adjustable combined vibration reducer (B) is composed of the spring (7), the hydraulic vibration reducer (6) inside the spring and the regulating nut (5), wherein the spring (7) provides support force, stiffness and reset ability, the regulating nut (5) regulates the length of the spring (7) to ensure that there is no tensile stress at a support member the root (A) in the balanced position, and the hydraulic vibration reducer (6) plays a role in in-plane buffer, displacement control, energy consumption and vibration reduction. The vibration isolator (3) produces shear deformation and consumes energy, and can reduce out-of-plane longitudinal vibration caused by action of the support member (1). By adopting the vibration isolation and reduction bracket for cable structures, fracture or fatigue damage of the support member root (A) caused by in-plane and out-of-plane three-direction vibration is solved, the redundancy of cable structures is enhanced, and the safety and using performance of a supported structure (2) are improved.

The invention discloses a ventilation transverse locking type unit curtain wall system which comprises multiple curtain wall units spliced with each other. Two adjacent curtain wall units in the vertical direction are fixedly connected through a transverse locking control piece, an airtight seal connecting piece and a watertight seal connecting piece, and two adjacent curtain wall units in the horizontal direction are connected through an airtight seal connecting piece and a watertight seal connecting piece. According to the ventilation transverse locking type unit curtain wall system, ventilation can be achieved, and glass plates can be replaced or maintained conveniently.

The invention provides a water supplement and drainage control method for a hanging board and sunshade board combined support slope greening structure. The water supplement and drainage control methodinvolves a hanging board fixed to a slope, the hanging board is anchored to the slope through a plurality of anchor rods, a sunshade board is anchored to the top of the slope, a plurality of groovesare formed in the hanging board, and water storage tanks are installed at the positions of the grooves. A water supplement and drainage pipe penetrates into the hanging board and is communicated withthe water storage tanks, the sunshade board comprises two metal boards with holes, and the two metal boards are arranged on the top layer and the bottom layer respectively; a pressure plate is fixed to the inner side wall of the metal board on the top layer, springs are fixed to the bottom of the inner wall of the pressure plate, the bottoms of the springs are fixedly provided with an opening-closing plate, and the bottom of the opening-closing plate is provided with the metal plate on the bottom layer; soft water drainage pipes are communicated between the pressure plate and the opening-closing plate. The water supplement and drainage control method has the advantages that construction is convenient, fewer damage factors exist, water drainage and supplement can be facilitated, and later maintenance is facilitated and reduced.

The invention relates to an overhead rail transportation system and a turnout system thereof. The turnout system comprises an overhead travelling rail and a balance rail for maintaining vehicle balance above a turnout, the balance rail comprising two parts corresponding to a straight part and a branch part of the turnout, and a movable direction selection mechanism arranged on a load traveling crane running on the traveling rail. The turnout system further comprises an inclined pressing strip which is fixedly installed on a bearing structure of the traveling rail and arranged at a certain inclined angle with the rail direction. Along with forward running of the load traveling crane, the inclined pressing strip can gradually extrude a stress device on the direction selecting mechanism by means of the moving force of a vehicle body, and the stress device is forced to move or rotate to a preset position required for enabling the load traveling crane to smoothly pass through a turnout. Theoverhead rail transportation system adopting the turnout system can ensure that a vehicle can safely, reliably and quickly pass through the turnout, and meets the design requirement of 'fault safety'.

The invention discloses a power plant flue gas white smoke elimination system based on the heat pipe heat exchange technology. The system comprises a desulfuration and dust removing device, a flue anda chimney. The flue is internally provided with a heat pipe heat exchanger and a reheating heat exchanger in sequence. The heat pipe evaporation segment is arranged inside the flue, the heat pipe condensation segment is located in a sealed box body, and low-temperature cooling water is introduced. The reheating heat exchanger and the heat pipe heat exchanger are both made of an ND steel materialwhich is resistant to corrosion and good in heat-conducting property. The technological process of the system comprises the steps that the low-temperature cooling water absorbs the waste heat of high-temperature flue gas through the heat pipe heat exchanger, the high-temperature flue gas releases heat and generates condensed water, and the temperature and the content of pollutants are lowered; andthe high-temperature steam heats the cooled flue gas through the reheating heat exchanger, the temperature of the emitted flue gas is raised, and the relative humidity is reduced. Through the system,the phenomenon that the power plant chimney emits white smoke is effectively avoided, and gypsum rain falling around a power plant is avoided; and meanwhile, the problem that the chimney is corrodedseriously due to the fact that the low-temperature flue gas stays in the chimney for a long time and is not dispersed is solved. Compared with other technologies, power plant flue gas white smoke elimination system is stable in operation and small in environmental pollution, and the problems that through other technologies, the heat releasing energy is not matched with the heating energy, and thelike are avoided.

The invention discloses a multi-directional coordinated rotating fixed bridge support, comprising an upper support plate, a spherical crown lining plate and a lower support plate, wherein a bridge forward-direction rotating block and a bridge cross-direction rotating block are arranged between the inner side wall of a check block of the upper support plate and the outer edge periphery of the top of the lower support plate; the outer side faces of the bridge forward-direction rotating block and the bridge cross-direction rotating block are separately connected with the plane of the check blockof the upper support plate in a sliding way, the inner side faces of the bridge forward-direction rotating block and the bridge cross-direction rotating block are separately and rotatably connected with the spherical surface of the outer edge of the upper end of the lower support plate, the bottom surfaces of the bridge forward-direction rotating block and the bridge cross-direction rotating blockare separately and rotatably connected with the spherical surface of a horizontal rotary check block fixedly connected with the bottom of the check block of the upper support plate, and adjustable gaps are reserved between the rabbet inner wall of the check block of the upper support plate and the top surfaces of the bridge forward-direction rotating block and the bridge cross-direction rotatingblock, so that multi-directional coordinated rotation of the support is realized. The multi-directional coordinated rotating fixed bridge support is simple in structure, low in manufacturing cost, andconvenient and fast to install; by means of multi-azimuth spherical rotational connection, all the components are in a surface contact stress state during work of the support, so that the service life of the support is significantly prolonged; therefore, the support has good economical practicability and popularization prospect.

The invention discloses a method of reinforcing soil mass by a W-type interlocking pile based on an MICP technique and belongs to the field of building fixation by biotechniques. The method comprisesthe following steps of placing an MICP grouting device in an appointed position of a pile body prior to pouring concrete to adjacent plain pile bodies of the W-type interlocking pile and connecting apressure grouting machine; and when it is needed to reinforce the soil mass, injecting a bacterial solution into one pipe and injecting a cementing solution into the other pipe through the pressure grouting machine, and in addition, inserting electrodes into the two plain piles at the most edge of the W-type interlocking pile. Permeability of the soil mass is reduced by means of the MICP technique, so that a good waterproof curtain is formed. Sudden welling in a foundation pit can be further inhibited to a certain extent, and meanwhile, soil masses on two sides of the foundation pit can be better reinforced by a foundation pit protecting way which combines the anti-bend W-type interlocking pile and the MICP technique reinforced soil mass, so as to prevent collapse of the foundation pit. The method of reinforcing the soil mass is easy to construct, can be repeatedly used, and is good in universality and wide in application prospect.

The invention belongs to the technical field of prefabrication of simply-supported railway beams, and in order to solve the problem that a bearing plate has an emptiness sound because of dense steel bars at the bearing plate, poor passability and difficult ramming of concrete, and the like during the prefabrication of a simply-supported railway beam, provides a method for controlling the emptiness sound of the bearing plate of a prestressed post-tensioned box beam. The method comprises the following steps: before installation of the bearing plate, gravels are uniformly adhered to the inner surface of the bearing plate through steel adhesive; at the beginning of concrete pouring of a beam body, concrete is dispensed from a web plate on the top surface of the beam body; and after the beginning of the concrete pouring, the concrete is rammed through own flowability of the concrete and in combination of a vibrorammer, so that the concrete flows into the bearing plate completely; and after the concrete at the bearing plate is compacted, the concrete is dispensed from the end head of the beam. By a new concrete pouring method, the emptiness sound caused by incompactness at the bearing plate in the concrete pouring process of the post-tensioned box beam is effectively controlled; and the emptiness sound caused by shrinkage and creep of concrete in the later period is effectively controlled by adhering the gravels, so that the product quality is improved and the later maintenance is reduced.

Disclosed is a cooling, heating and power combined utilization system based on slot type condensation efficient solar energy. The cooling, heating and power combined utilization system based on the slot type condensation efficient solar energy is characterized by comprising an efficient slot type condensation system, a combined heat and power system, a black cavity reheating system, an energy storage and releasing system, a refrigerating system, a cooling using system and a heating using system. Not only can the problems of unstable working performance of a solar cell and short service life be solved, but also the problem of temperature rising of cooling working media is solved, potential temperature of the cooling working media after temperature rising is greatly improved, and the grade of heat energy is improved. Meanwhile, high-grade heat energy can be stored, so that the refrigerating system can use energy continuously and stably, the application areas are expanded, and the high-efficiency comprehensive utilization of solar energy is achieved.

The invention relates to a spray film waterproof material, a two-component spray film waterproof material and a use method thereof, the spray film waterproof material can form a component A and a component B, the component A comprises the following raw materials by weight: 100-130 parts of an acrylate monomer solution; the component B is prepared from the following raw materials in parts by weight: 100 parts of acrylate monomer solution, 0.5 to 5 parts of modified silicone, 0.01 to 0.1 part of humectant and 5 to 20 parts of filler; the use method comprises the following steps: (1) adding an initiator A into the component A to form a mixed solution A, and adding an initiator B into the component B to form a mixed solution B; (2) simultaneously spraying a mixed solution A and a mixed solution B through double-cylinder spraying equipment; and (3) mixing the two mixed solutions at the intersection point with the spraying distance of 40-50cm, initiating polymerization reaction to form gel, and adhering the gel to a basal plane to form a film layer. The cohesiveness of the silicone and the cohesiveness of the polyacrylate are superposed, so that the cohesiveness of the waterproof film layer is improved.

The invention discloses a multidirectional coordination type rotary one-way movable bridge support. The bridge support comprises an upper base plate, a middle base plate and a lower base plate; rotating blocks are arranged between the inner side of an upper base plate check block and the outer edge of the upper end of the lower base plate; the outer side surfaces of the rotating blocks are connected to the inner side wall of the upper base plate check block in a plane sliding mode; the inner side surfaces of the rotating blocks are connected to the outer edge of the upper end of the lower baseplate in a spherical sliding mode; the bottom surface of the rotating blocks are connected to horizontal rotating check blocks arranged on the two sides of the bottom of the upper base plate check block in a spherical sliding mode; and adjusting gaps for compensation of rotational displacement generated by the rotating blocks are reserved between the top surfaces of the rotating blocks and the inner wall of a notch of the upper base plate check block. According to the bridge support, all components can be in a surface contact stress state in the normal use process of the support, the stress concentration phenomenon caused by line-surface contact can be avoided, and therefore the service life can be remarkably prolonged on the premise that the safety of the support is achieved, the construction safety of a bridge can further be higher, the service life can be longer, the structure is simple, the manufacturing cost is low, installation is convenient and rapid, and good economical practicability and popularization prospect can be achieved.

The invention discloses a power plant circulating water pump motor two-speed transformation method. A group of B phase CT and secondary wiring of B phase CT is added, and the wiring mode of a winding in a circulating water pump motor is changed through switching of a transfer switch. According to a stator winding, the 16-th pole serves as the basis pole, that is, the stator winding is in star connection during high-rotation-speed running, and the stator winding is in triangular connection when running at the 18-th pole rotation speed, that is, running in a low rotation speed. By the aid of the method, the economic benefit is high, the energy-saving effect is apparent, and the method can be popularized and applied in related power plants and similar enterprises in the transformation of certain specific circulating water pump motors due to the low investment cost and little post maintenance.

The invention relates to a method for filtering material by a blast furnace feeding system and belongs to the technical field of blast furnace ironmaking feeding system equipment modification. Under a mode of not installing a vibrating feeder, a manual board plug valve is opened; raw material is pressed on a sieve directly; when a weighing can sends a material-requiring application, the material on the sieve enters into the weighing can directly to be conveyed into a furnace for ironmaking. The method is characterized in that a pneumatic board plug valve which is controlled by a computer is added at the back of the manual board plug valve at a silo feed opening of a crude fuel system in a silo; after the manual board plug valve is closed completely, the feed opening which meets the technical requirement is cut on a valve board according to different crude fuel in the silo; and when material is required to be filtered, the computer controls the pneumatic board plug valve to feed. The method has the advantages that the step of adding a vibrating feeder in the original design of a feeding system is simplified, the corresponding, expenses for engineering construction, equipment purchase, later maintenance and the like are saved, the granularity of the raw material is improved effectively by the exact control of the filtering process and the yield of the blast furnace is raised by 1 percent after the raw material quality is improved.

The invention discloses a modular nitrification and denitrification membrane bioreactor. The modular nitrification and denitrification membrane bioreactor comprises a module, wherein a nitrification and denitrification reaction area is arranged on the left side in the module, biological filler with the density reduced gradually is arranged in the vertical direction in the nitrification and denitrification reaction area, a membrane biological reaction area is arranged on the right side in the module, a membrane box is arranged in the membrane biological reaction area, membrane elements are arranged in the membrane box, an aeration box is arranged below the membrane box in the membrane biological reaction area, sewages flows from top to bottom in the nitrification and denitrification reaction area, and treated water is discharged through a self-priming pump. The nitrification and denitrification reaction area and the membrane biological reaction area are integrated to form a module, the modular nitrification and denitrification membrane bioreactor can adapt to various occasions through combination of modules, and requirements of various sewage treatment scales are met; each module is an independent treatment unit, the modules are not affected during overhaul, ceaseless water discharging all year round can be completely realized, the water supply reliability is greatly improved, the system is stable, the operation period is long, and the application range of MBR (membrane biological reactor) engineering is extended.

The invention discloses a design method of a stadium hanging bracket based on a BIM technology, and belongs to the field of stadium engineering. The method comprises the following steps of determiningdesign rules of a hanging bracket and a pipeline, collecting drawings, limiting a BIM model and the size of the BIM model, linking related models and outputting a distribution diagram, performing collision inspection on the BIM model, setting an arrangement principle, selecting pipeline branches and elbows, reviewing materials by experts, estimating the cost, recording data, arranging field construction and the like. By adopting a BIM technology and using Revit, the problems of unreasonable early-stage design, easy loss of design materials, high field construction difficulty, easy reworking,unreasonable space design, increased later-stage maintenance difficulty and the like are solved.

The invention relates to an alkali returning prevention construction method for a wall body, and belongs to the technical field of building construction. The construction method comprises the following steps of: coating moistureproof materials on a wall surface, and forming a moistureproof layer after naturally drying to obtain a moistureproof layer wall surface; adding acidic materials into warmwater with 60 DEG C, and stirring and mixing evenly to obtain a weak acid solution; taking the weak acid solution, uniformly coating the solution on the moistureproof layer wall surface, and naturallydrying for at least three days to obtain a dry moistureproof layer wall surface; taking waterproof putty, uniformly scraping the waterproof putty on the dried moistureproof wall surface, and drying,grinding and removing ash to form a putty layer to obtain a putty layer wall surface; taking an alkali-resistant sealing primer, and uniformly coating the alkali-resistant sealing primer on the puttylayer wall surface; punching a foundation near the wall, pouring Na2SiO3 solution and CaCl 2 into the hole in turn, and sealing the hole by the concrete after being placed for 1-2 days naturally. Theconstruction method has the beneficial effect that the phenomenon of alkali returning on the wall surface can be solved from the root.