46results about How to "Provide stable" patented technology

The utility model belongs to the technical field of anti-corrosion steel pipes, and particularly relates to an adhesive force testing frame for an anti-corrosion layer of a three-PE (Poly Ethylene) anti-corrosion steel pipe. The device comprises a support; the force application mechanism is arranged at the top end of the support, the force application mechanism comprises a pull rope, and the pull rope penetrates through the top end of the support and extends into the lower portion of the support; one end of the dynamometer is connected with the pull rope; and the clamp is connected with the other end of the dynamometer and is used for clamping the anti-corrosion layer. The tensile test device is used for solving the technical problems that in the prior art, the tensile test can be completed only by sampling the anti-corrosion steel pipe and feeding the sample into a test room, and the tensile test cannot be directly performed on the anti-corrosion steel pipe in the production and sales processes.

The invention provides a data center cascade refrigeration system control method and device, and the method comprises the steps: obtaining an outdoor wet bulb temperature to determine a first target temperature, obtaining an indoor return air temperature to determine a second target temperature, and calculating the temperature difference between the first target temperature and the second target temperature; the data center cascade refrigeration system is controlled to enter a first refrigeration mode, a second refrigeration mode or a third refrigeration mode according to preset conditions, and only the chilled water refrigeration system is started in the first refrigeration mode; in the second refrigeration mode, the chilled water refrigeration system and the evaporation cold and heat pipe refrigeration system are started at the same time; and in the third refrigeration mode, only the evaporation cold and heat pipe refrigeration system is started. In different modes, the system optimizes the refrigeration effect by adjusting the compressor frequency, the water pump frequency, the water supply valve opening, the fan frequency, the fluorine pump frequency, the expansion valve opening and other parameters, and the problems that in an existing refrigeration system in the prior art, the water side natural cooling time is short due to the fact that the temperature difference between the air side and the water side is inconsistent are solved. And more energy is consumed to meet the refrigeration requirement.

The invention discloses a two-stage short-cut denitrification-anaerobic ammonia oxidation double-granule sludge device for sewage treatment. Comprising a nitrate nitrogen wastewater tank and a carbon source water tank which are arranged in parallel, a short-cut denitrification granular sludge reactor which is jointly connected with the nitrate nitrogen wastewater tank and the carbon source water tank, and an anaerobic ammonia oxidation granular sludge reactor which is connected with the short-cut denitrification granular sludge reactor in series, the short-cut denitrification granular sludge reactor comprises a short-cut denitrification tank body, a first water inlet is formed in the lower end of the short-cut denitrification tank body, the nitrate nitrogen wastewater tank is communicated with the first water inlet through a first water inlet pump, and the carbon source water tank is communicated with the first water inlet through a second water inlet pump; according to the invention, short-cut denitrification and anaerobic ammonia oxidation decoupling are realized, and adverse effects of organic matters on anaerobic ammonia oxidation are avoided; the whole set of device is a complete continuous flow process, and compared with the process in the prior art, the production rate of nitrite nitrogen is effectively improved, and a reaction substrate can be continuously and stably provided for anaerobic ammonia oxidation.

The invention relates to the technical field of power distribution and utilization and communication, in particular to a multi-source wide-area power distribution and utilization terminal time correction method and device, electronic equipment and a chip. The time correction method comprises the steps that a multi-source fusion power distribution and utilization terminal obtains reference time service time based on a preset reference time service source or based on multiple different time service sources, a time service deviation value between the reference time service time and the time service time of the to-be-corrected time service source is calculated, a time service time optimization parameter is determined according to the time service deviation value in combination with a moving average filtering algorithm improved based on Pearson's correlation, and the time service time optimization parameter is used for correcting the time service time of the to-be-corrected time service source. When time service time optimization parameters are determined, a moving average filtering algorithm which is improved based on Pearson's correlation is combined, and the correlation between data is considered, so that noise can be effectively filtered, time deviation can be smoothed, the accuracy of time service correction is improved, and the high-accuracy time service synchronization requirement of the power distribution and utilization terminal in a power system is met.

The utility model provides an integrated thermophotoelectric isotope power supply testing device, and relates to the technical field of power supplies. The integrated thermophotoelectric isotope power supply testing device comprises a rack, a vacuum cavity, a heat source, a photoelectric conversion module and a cooling module, the vacuum cavity is installed on the rack and provided with a vacuum cavity and a vacuumizing connector communicated with the vacuum cavity. The heat source is mounted in the vacuum cavity; the photoelectric conversion module comprises a filter and a transducer which are arranged in the vacuum cavity, and the heat source, the filter and the transducer are sequentially arranged from bottom to top; the cooling module is installed in the vacuum cavity, and the cooling module is matched with the energy converter and used for conducting heat exchange with the energy converter so as to reduce the temperature of the energy converter; wherein the heat source is a radioactive isotope heat source or a simulated heat source. The device can test the performance of a simulated thermo-photoelectric isotope power supply system while testing a miniaturized thermo-photoelectric isotope power supply, and meets the stability of long-time operation.

The utility model discloses a detachable real-time monitoring device for scouring around an offshore wind power foundation pile, which relates to the technical field of offshore wind power, and comprises an overwater unit, an underwater unit and a watertight cable used for connecting the overwater unit and the underwater unit, the underwater unit is sleeved outside a steel pipe pile, the overwater unit is arranged at the top of an outer platform, and the underwater unit is connected with the watertight cable. The underwater unit comprises a plurality of first special-shaped steel plates, the multiple first special-shaped steel plates are arranged on the outer sides of the steel pipe piles in a sleeving mode, and first double-nut bolts are arranged at the joints of the multiple first special-shaped steel plates. The steel pipe pile, the first special-shaped steel plate, the first double-nut bolt, the flitch plate, the second special-shaped steel plate, the supporting steel pipe and the second double-nut bolt are arranged in a matched mode, so that the underwater unit has a detachable function, regular operation and maintenance, overhaul and replacement of the monitoring device are facilitated, meanwhile, segmented disassembly can be conducted according to the working condition of the underwater unit, and the underwater unit is convenient to use. And overall disassembly is not needed.

The invention belongs to the field of sludge utilization, and relates to a method for preparing roadbed filler through solidification and modification of water supply plant sludge. Comprising the following main steps: mud detection: aiming at dewatered sludge of a water supply plant, carrying out mud index detection, analyzing mud characteristics of the sludge, and evaluating feasibility of preparing roadbed filler from the sludge and key of a curing modification technology; sludge conditioning: uniformly mixing dewatered sludge of a water supply plant with a hydration conditioner, carrying out material covering and stacking, and then digging, airing and crushing for later use; curing and modifying: sequentially adding a gel curing agent, high polymer fibers and a resin water-retaining agent into the conditioned sludge, and uniformly mixing to obtain roadbed filler; and filler detection: carrying out environmental index detection and indoor soil test on roadbed filler, and evaluating whether the mechanical properties of the sludge curing modified filler meet the design requirements or not. The method can realize water supply plant sludge solidification modification, improve the sludge bearing ratio and shear strength, reduce the environmental risk of using heavy metals and pathogenic bacteria in sludge building materials, and is beneficial to solving the double dilemma of sludge outlet shortage and road base material shortage in urban development.

The utility model provides a humidifier which comprises a main body and a mist guide assembly, an atomization assembly and a vertically-arranged mist outlet channel are arranged in the main body, a mist outlet is formed in the mist outlet channel, and the mist guide assembly comprises a mist guide cover, a spoiler and a flow guide plate. The mist guide cover covers the mist outlet channel and is provided with mist outlet holes, the spoiler is transversely arranged on the mist outlet channel to form a gap in the mist outlet channel, the flow guide plate is arranged on the bottom face of the mist guide cover in a protruding mode so that the gap and the mist outlet holes can be separately formed in the two sides of the flow guide plate, and the flow guide plate is arranged on the bottom face of the mist guide cover. Mist generated by the atomization assembly enters the atomization channel, passes through a steering path between the notch and the mist outlet hole and is diffused outwards from the mist outlet hole. According to the humidifier, the gap is matched with the mist outlet hole of the mist guide cover, so that the mist is subjected to multiple times of steering in the channel, the diffusion uniformity of the mist is improved, and meanwhile, the flow guide plate can guide water drops to prevent the mist outlet from being blocked.

The utility model discloses a 700V direct current bus-based grid-connected and off-grid wind-light hydrogen storage coupling hydrogen production power supply system. The system comprises a photovoltaic power generation module, a wind power generation module, a hybrid energy storage module, a grid-connected module and a water electrolysis hydrogen production module. The photovoltaic power generation module and the wind power generation module are respectively connected to a 700V direct current bus through a DC / DC converter and an AC / DC rectifier, and power switch tubes in the DC / DC converter and the AC / DC rectifier all adopt SiC MOSFETs. When a power grid operates normally, if the electric energy supplied to the water electrolysis hydrogen production module by the wind and light power generation module is redundant, the redundant electric energy is stored in the hybrid energy storage module; and if the generating capacity of the wind power generation module and the photovoltaic power generation module is insufficient, the electric energy stored by the hybrid energy storage module is released to the water electrolysis hydrogen production module, so that efficient and stable operation of the water electrolysis hydrogen production module is ensured. When a power grid breaks down, the system operates in an off-network mode, and the wind and light power generation module and the hybrid energy storage module jointly provide electric energy needed by operation of the water electrolysis hydrogen production module.

The utility model discloses an aeration device of aerobic fermentation tank belongs to the organic fertilizer production technical field, including setting in the main gas pipeline of the bottom wall in the fermentation tank body, through the connecting assembly detachable setting on the multiple branch gas pipeline of main gas pipeline, the aeration head of setting in each branch gas pipeline top, set up the anti -blocking subassembly on aeration head, detachable setting in the baffle above anti -blocking subassembly and located in the fermentation tank body, set up a plurality of first gas hole on the baffle, and set up the gas feeding device of the main gas pipeline communication with outside the fermentation tank body, the length direction of branch gas pipeline and the length direction of main gas pipeline perpendicular each other. The utility model discloses through the perpendicular setting of multiple detachable connection's branch gas pipeline on main gas pipeline, can be convenient to separate branch gas pipeline, has reduced the equipment downtime and maintenance cost.

The invention discloses an accurate search recommendation method and system based on user portraits and big data analysis, and the method comprises the steps: continuously collecting the attribute information of a promotion activity, constructing an evaluation index, and calculating a potential influence score of the promotion activity; obtaining the basic weight of the behavior type, and updating the sensitivity index according to the behavior type and strength; determining an association relationship between a content item corresponding to the behavior and the promotion activity, if so, calculating an external induction probability based on a potential influence score and a sensitivity index, and using the external induction probability as an attenuation factor to update a behavior weight; and generating a recommendation result based on the updated weight, judging the user feedback after the recommendation result is generated in the time window again, updating and iterating the time accumulation data of the behavior data feedback of the user, and continuously correcting the user portrait and the interest weight thereof, so that the user behavior feedback data under the condition of not neglecting the promotion activity is obtained. And meanwhile, real accurate recommendation is realized.

The invention relates to an offshore hydrogen production multifunctional platform water supply system and an integrated skid device. The water supply system comprises a seawater lifting unit, a reverse osmosis water making unit, a pure water making unit and a constant-pressure pure water supply unit. The seawater lifting unit comprises a submersible pump and a hose winch. The reverse osmosis water making unit comprises a first pump body, a multi-stage reverse osmosis membrane assembly and a fresh water tank, seawater is pumped to the multi-stage reverse osmosis membrane assembly through the first pump body to be desalted, and desalted fresh water enters the fresh water tank. And the pure water preparation unit comprises a second pump body, an EDI device and a pure water tank. The constant-pressure pure water supply unit comprises a third pump body, a pressure stabilizing tank and a pure water tank, and pure water in the pure water tank is pumped into the pressure stabilizing tank through the third pump body, is subjected to pressure stabilization through the pressure stabilizing tank and enters the pure water tank. The water supply system can supply pure water for hydrogen production to the platform hydrogen production module, can also supply fresh water to platform fresh water users, and can meet the use requirements of fresh water and pure water of the offshore hydrogen production multifunctional platform.

The invention relates to the technical field of sewage biochemical treatment, in particular to a biomass carbon source for culturing sewage treatment granular sludge and a preparation process of the biomass carbon source. Comprising the following steps: preparing cellulose template fluid; carrying out modification pretreatment on the plant biomass; and fiberizing and compounding the biomass carbon source. The cellulose template fluid is continuously sprayed into the biomass mixed oil agent through electrostatic spinning, a formed biomass carbon source can provide a good growth initial stage carrier for microorganisms, the nitrogen and phosphorus removal effect of the microorganisms is promoted, modified biomass in the biomass mixed oil agent is chelated with the cellulose template fluid through Fe < 3 + > on the surface, and the nitrogen and phosphorus removal effect of the microorganisms is improved. According to the method, a cellulose template fluid is prepared, so that a layer of compact and uniform biomass film is formed on the surface of the cellulose template fluid, a high C / N ratio can be provided in sewage, reproduction and self-flocculation of microorganisms in the sewage on a biomass carbon source are promoted, and the method has more efficient denitrification capacity in the sewage.

The hydraulic pump liquid flow pressurization control mechanism comprises a shell (20), the upper end of the inner side of the shell (20) is provided with a third combined oil way (10), one side of the lower end of the third combined oil way (10) is provided with a first hydraulic mechanism, and one side of the first hydraulic mechanism is provided with a second hydraulic mechanism used for conducting pressure regulation and oil supply on the first hydraulic mechanism. The device has the advantages of convenience in power adjustment and stability and reliability in operation.

The invention discloses a power generation energy control method for a novel transformer substation standby power supply system based on a fuel cell, and the method comprises the following steps: S1, constructing a complete novel transformer substation standby power supply system based on the fuel cell, and enabling the system to comprise the fuel cell used as the standby energy of the transformer substation and a super capacitor; s2, performing short-term power prediction on a fuel cell and a super capacitor in the novel standby power supply system of the transformer substation, and providing support for optimized operation and energy management of a subsequent system; and S3, energy distribution of the fuel cell and the super capacitor is optimized in real time, so that the system can quickly adapt to a continuously changing operation environment, and the energy utilization efficiency is improved. According to the invention, the system can rapidly adapt to a continuously changing operation environment, the energy utilization efficiency is improved, and the reliability and durability of the standby power supply system in long-time operation are improved.

The invention provides a license-plate-free automatic weighing method and weighing system based on Tag identification, and relates to the technical field of weighing, the method and system are applied to a weighing vehicle of which the front end and the rear end are both provided with Tag equipment, the front end and the rear end of the weighing vehicle are provided with the Tag equipment, when the weighing vehicle enters a weighing area, a first Tag sensor reads front-end Tag information, the front-end Tag information is compared with a data mapping library to confirm the vehicle, and after confirmation, the weighing vehicle enters the weighing area. The first Tag sensor and the second Tag sensor work at the same time, whether the vehicle is completely located in the weighing area or not is judged according to front and back Tag information, if yes, vehicle information and weight data are recorded, and when the vehicle leaves, the second Tag sensor detects the rear end Tag, and if not, it is regarded that the vehicle leaves the parking lot. Through Tag identification and position confirmation, accurate and efficient weighing is ensured, manual intervention is reduced, and logistics transportation efficiency and safety are improved.

The present invention provides a helicopter engine input end shaft system bearing test loading device, characterized in that it comprises: an input power unit; a bearing installation unit, the bearing installation unit is connected to the output end of the input power unit; and a loading unit, the loading unit is arranged above the output end of the input power unit and is arranged in contact with the bearing installation unit; the input power unit drives a first test bearing installed on the bearing installation unit to rotate; the loading unit loads the rotating first test bearing to test the performance parameters of the first test bearing; the loading unit and the input power unit are arranged perpendicular to each other and the loading block is arranged in a conical shape and cooperates with the conical loading part to realize simultaneous loading of the bearing to be tested, and simultaneously provide axial force and radial force, and the force size is controllable, thereby improving the accuracy of the parameters of the bearing to be tested.

The utility model provides a constant current power supply module. The constant current power supply module comprises a circuit board, and a first power supply conversion chip 78M05, a first MOS tube, a second MOS tube and a second power supply conversion chip L6726A which are arranged on the circuit board, one end of the circuit board is provided with a power input interface used for inputting a first direct-current power supply, and the other end of the circuit board is provided with a power output interface used for outputting a second direct-current power supply; the first power supply conversion chip 78M05 converts a first direct-current power supply into a third direct-current power supply, the second power supply conversion chip L6726A converts the third direct-current power supply into a second direct-current power supply, and the magnitude of the output current is dynamically adjusted, so that the output current tends to be stable; the constant-current power supply module can stably provide a power supply with constant current to ensure that the electrolysis device can work normally under various conditions, and the current cannot be increased suddenly even if a short circuit occurs, so that the electrolysis device is protected from being damaged; and the constant-current power supply module also has the characteristics of small size and low manufacturing cost.

The utility model provides a pVTt method hydrogen flow calibrating device which comprises a gas supply pipeline, a pressure regulating module, a heat exchange module, a gas storage pressure stabilizing module, a detected hydrogen module, a measuring module and a gas exhaust pipeline which are sequentially arranged, the measuring module comprises a measuring assembly and a measuring tank, the pressure regulating module, the heat exchange module, the gas storage pressure stabilizing module, the detected hydrogen module and the measuring tank are sequentially communicated in an on-off manner and form a hydrogen detection flow path with the gas supply pipeline and the gas exhaust pipeline; the measuring assembly is used for measuring time for hydrogen to flow into or out of the measuring tank and temperature change and pressure change in the measuring tank, and the detected hydrogen module is used for measuring the flow of hydrogen flowing into the measuring tank; and the pressure regulating module and the detected hydrogen module can be communicated in an on-off manner and form a purging flow path with the gas supply pipeline and the gas exhaust pipeline. According to the technical scheme provided by the utility model, the temperature and pressure verification condition range and verification precision of the pVTt method in the prior art can be expanded.

The invention discloses an engine air protection system which comprises a first air guide part, a second air guide part and a third air guide part, air is formed through the first air guide part and the second air guide part and guided to a first target area, heat dissipation is conducted on an engine or target equipment in the first target area, and the engine or target equipment in the first target area can be adjusted by operating an adjusting part. The air is guided by the adjusting piece to flow out at different angles, at the moment, the area of the area where the air flowing out of the second air guiding piece acts can be changed, and then the heat dissipation device adapts to heat dissipation operation of engines and target equipment of different sizes or different specifications, and the third air guiding piece is used for guiding the air to flow towards the second target area. When the first target area is subjected to heat dissipation operation, heat which cannot be covered by the first target area is more accurately dissipated, so that the heat dissipation effect of the whole engine compartment is improved, heat dissipation operation is stably and reliably provided, the vehicle performance is improved, vehicle development is facilitated, and the applicability of the air protection system is improved.

The utility model discloses a sulfur vapor preparation device which comprises a sulfur melting device, a secondary sulfur heating device, a sulfur melt atomizing device and a sulfur vapor separation device, the sulfur melting device comprises a sulfur melting tank and a first heating device connected with the sulfur melting tank; the secondary sulfur heating device comprises a sulfur melt storage device and a second heating device connected with the sulfur melt storage device; a liquid outlet of the sulfur melt storage device is connected with the sulfur melt atomization device; an outlet of the sulfur melt atomization device is communicated with a liquid inlet of the separation device, and a liquid outlet of the separation device is communicated with the sulfur melt storage device; a gas outlet of the separation device is connected with a sulfur steam using device through a regulating valve; and high-efficiency low-temperature preparation of pure sulfur steam is realized.

Provided is a method for stably obtaining a product. The present invention relate to a tank for use in a purification apparatus, the tank being: at least one of a crystallization tank that forms a slurry containing crystals of a compound or a ripening tank that is capable of keeping crystals of a compound suspended therein, the tank including a nozzle for feeding a compound-containing solution or a slurry containing crystals of a compound into the tank while the solution or slurry is brought into contact with an inner wall surface of the tank; and a heating mechanism for heating an area of the inner wall surface with which the compound-containing solution or the slurry containing crystals of a compound is to be brought into contact.

The present invention provides a Jboss cache cleaning method and device, which can be used in the field of distributed technology. The method comprises: in the first preset period of each day, obtaining multiple idle Jboss services in a Linux system; for each idle Jboss service, using the root user authority of the Linux system to stop the Jboss service process; using the root user authority to modify the files involved in the Jboss service to the authority of the Jboss service user; archiving the logs in the Jboss service cache to a target server; using the root user authority to delete the logs in the Jboss service cache; switching the root user to the Jboss user, and starting the Jboss service process. The present invention can realize Jboss cache cleaning, with high efficiency and convenient application.

The utility model discloses a steady-flow epoxy powder inner spraying device special for a long and thin steel pipe, and relates to the technical field of powder inner spraying devices, the steady-flow epoxy powder inner spraying device comprises a powder spraying gun, the powder spraying gun comprises a current stabilizer, an outer pipe, an inner pipe, a gun head connector, a gun head and a spoiler, the outer pipe is arranged on the outer side of the inner pipe in a sleeving mode, and an annular space between the outer pipe and the inner pipe is a cooling cavity; the two ends of the outer pipe and the two ends of the inner pipe are connected with the flow stabilizer and the gun head respectively, the two powder outlet pipes are communicated with the tail of the flow stabilizer, the gun head is installed on the gun head connector, and the turbulator is in a horn shape and inserted into the gun head. One end of the cooling air hose is connected with an air source, and the other end of the cooling air hose is connected to the tail of the outer pipe and communicated with the cooling cavity. An air outlet channel communicated with the cooling cavity is formed in the gun head connector, the outer pipe is sleeved with a plurality of outer pipe heat insulation sleeves, and a heat insulation layer is arranged on the outer wall of the inner pipe; the device is simple in structure, reliable and durable, does not have the phenomena of gun barrel blockage, surge and the like during continuous production and use, and completely meets the requirement of epoxy powder inner spraying of the long and thin steel pipe.

A multi-fuel blending test system for conveying blended fuel to a test piece is provided, the system comprises an aviation kerosene supply assembly, a biofuel supply assembly, a blending assembly, a nitrogen supply system and a pump set, and the aviation kerosene supply assembly comprises a kerosene tank; the biofuel supply assembly comprises a biofuel oil tank; the mixing assembly is connected with the aviation kerosene supply assembly and the biofuel supply assembly and used for adjusting the mixing proportion of aviation kerosene and biofuel and outputting mixed fuel. The nitrogen supply system is used for providing pressure for driving aviation kerosene and biofuel to flow; and the pump set is arranged between the mixing assembly and the test piece and is used for secondarily pressurizing and mixing the fuel. The invention further provides a multi-fuel mixing test method. According to the system and the method, the blended fuel can be stably and accurately provided.

The application relates to a continuous supercritical fluid spinning system for continuously preparing micro-nano fiber non-woven fabric, which comprises a supercritical fluid spinning liquid preparation device, a micro-nano fiber supercritical spinning device, a secondary drawing and bundle collecting device of micro-nano fiber, the supercritical fluid spinning liquid preparation device is connected with the micro-nano fiber supercritical spinning device, the micro-nano fiber supercritical spinning device is arranged above the secondary drawing and bundle collecting device of micro-nano fiber, the supercritical fluid spinning liquid preparation device is used for continuously preparing uniform and stable supercritical fluid spinning liquid, the micro-nano fiber supercritical spinning device is used for preparing uniform and continuous micro-nano fiber, and the secondary drawing and bundle collecting device of micro-nano fiber is used for secondary drawing and bundle collecting of micro-nano fiber. Compared with the prior art, the continuous supercritical fluid spinning system can continuously prepare non-woven fabric with high strength, good barrier property and excellent air permeability.

The invention discloses a vehicle-mounted movable multi-stage pressure reduction gas supply system, which belongs to the technical field of pressure reduction gas supply, and comprises a gas distribution assembly, a gas cylinder group, a first-stage pressure reduction valve, a second-stage pressure reduction valve, a standby pressure reduction valve and a silencing assembly, and the gas distribution assembly comprises a gas distribution table, a gas inlet pipe group, a standby pipe group, a transmission pipe group and a gas outlet pipe group; the gas cylinder set communicates with the end, away from the conveying pipe set, of the gas inlet pipe set. The first-stage pressure reducing valve is arranged on the transmission pipe group; the secondary pressure reducing valve is arranged on the air outlet pipe group; the standby pressure reducing valve is arranged on the standby pipe group; the silencing assembly is connected with the air distribution assembly. According to the vehicle-mounted movable type multi-stage pressure reduction gas supply system, the problems that gas cannot be continuously and stably supplied, the gas supply pressure grade is single, and multi-position gas supply cannot be achieved in the prior art are solved, the acting effect is remarkable, and the vehicle-mounted movable type multi-stage pressure reduction gas supply system is suitable for wide popularization.

The invention relates to the technical field of feeding and discharging equipment, in particular to an automatic feeding and discharging device of equipment, which comprises a rack, a mounting frame, a storage assembly, a connecting assembly and a driving assembly, the mounting frame is rotatably mounted on the rack, and two or more material roll mounting rollers are arranged on the mounting frame; the storage assembly is installed on the rack and can synchronously store part of flexible sheet raw materials when the flexible sheet raw materials are conveyed, the connecting assembly is installed on the rack and can connect the two sections of flexible sheet raw materials together through the connecting assembly, and the driving assembly is installed on the rack and drives the installation frame to rotate through the driving assembly. According to the invention, a part of raw materials are stored in real time in the discharging process through the storage assembly, and then the raw materials are released when the material rolls are replaced, so that enough time for replacing the material rolls at the front end is ensured, and finally seamless-connection material replacement is realized, so that rear-end equipment can keep continuous operation, and the production takt and the production efficiency are ensured.

A method for manufacturing an electromagnetic steel sheet by heating a billet to a temperature of 1300 DEG C or less, hot-rolling the billet to obtain a hot-rolled sheet, annealing the hot-rolled sheet, then cold-rolling the hot-rolled sheet to obtain a cold-rolled steel sheet having a final sheet thickness, and finally annealing the cold-rolled sheet, a method for manufacturing an electromagnetic steel sheet having excellent magnetic characteristics by preferentially appearing crystal grains having a specific orientation without impairing the grain growth properties of recrystallized crystal grains by setting the difference between the vicinity of the grain boundaries in the processed crystal grains of the cold-rolled steel sheet and the amount of strain in the crystal grains to a predetermined value or more; and a cold-rolled sheet used in this production method, the steel sheet containing, in mass%, 0 to 0.100% of C, 1.00 to 5.00% of Si, 0 to 1.00% of Mn, 0 to 0.02% of P, 0 to 2.00% of Al, 0 to 0.010% of N, 0 to 0.010% of S, 0 to 0.010% of Se, 0 to 0.100% of Ti, 0 to 0.100% of Nb, and 0 to 0.100% of V, and further containing at least one of Sn and Sb in a total of 0 to 0.200%.