48results about How to "Reduce the temperature difference between inside and outside" patented technology

The invention belongs to the technical field of suture line production, and particularly relates to medical suture line injection molding integrated equipment with barbs, the medical suture line injection molding integrated equipment comprises a softening assembly, a cutting assembly, a shaping assembly and the like, the softening assembly is used for softening a flat wire, the cutting assembly is used for processing barbs on the two sides of the softened flat wire in a staggered mode, and the shaping assembly is used for processing the barbs on the two sides of the softened flat wire. The rounding shaping device is used for rounding and shaping the flat wire with barbs processed. The flat wire is heated and softened through the softening assembly, so that a cutter in the cutting assembly can cut barbs on the wire more easily, the requirement for the strength of the cutter is low, meanwhile, due to the fact that the cutter cuts the softened wire to process the barbs, the cutting efficiency is improved, and the cutting efficiency is improved. Therefore, the first electric push rod for driving the cutter only needs to consume less electric energy to provide less power, so that the cutter can effectively cut the wire rod, the size of the first electric push rod serving as a driving structure is reduced to the greatest extent, and the equipment cost is effectively reduced on the basis of ensuring the requirement.

The invention relates to the technical field of power distribution cabinet protection, and discloses a high-low voltage power distribution cabinet with a protection function and a use method thereof.The high-low voltage power distribution cabinet comprises a shell mechanism, the shell mechanism further comprises a base, and a fixed square pipe is fixedly connected to the top of the base. The piston plate is driven to slide downwards along the inner wall of the fixed square pipe, the space inside the electric box shell and above the piston plate is a closed environment, when the piston plate moves downwards, the space of the closed environment is increased, but internal gas is not changed, the environment is forced to form a low-pressure environment, and when normal air pressure is converted into the low-pressure environment, the low-pressure environment is not changed. Through the application of the components, the overall temperature in the base is synchronously reduced when the outside is cooled in rainy days, so that the temperature of air inside and outside the base is in a level state, the temperature difference between the inside and outside of the base is reduced, and the situation that small water drops are generated in the base, and the service life of internal electronic instruments is affected is avoided.

The invention discloses an anti-condensation electric power ring main unit based on optical radiation heating, and relates to the technical field of ring main units, and the anti-condensation electric power ring main unit comprises a composite mechanism. According to the anti-condensation power ring main unit based on optical radiation heating, through the design of a composite mechanism, the composite shell is used for storing and placing electronic elements, in the daily operation process of the electronic elements, the temperature in the composite shell rises, the temperature difference between the interior and the exterior of the equipment is large, and condensation occurs in the equipment; the heater adopts optical radiation heating to prevent condensation, mainly converts optical radiation energy into heat energy, increases the temperature of an object or a space, and enables the temperature of the surface of the object to be higher than the dew point temperature, so that water vapor is prevented from being condensed into dewdrops on the surface of the object, the water vapor is absorbed through the moisture-proof mechanism, and the interior of the equipment is kept dry. And the ventilation mechanism is used for ventilating the interior of the composite shell, so that the temperature difference between the interior and the exterior is reduced, the probability of condensation is reduced, and the equipment is protected to a certain extent.

The invention discloses a bridge bearing platform construction method which comprises the following steps: excavating a bearing platform pit foundation on the periphery of a pile foundation according to a design drawing and a field geological exploration condition, sequentially leveling a slope surface, inserting and driving soil nails and paving a reinforcing mesh, and then carrying out shotcreting and anchoring operation by adopting C20 shotcreting concrete; annularly cutting the designed elevation position of the pile head of the foundation pile by using a grinding machine; after the bearing platform reinforcement cage is manufactured into the bearing platform reinforcement cage, a cooling structure is installed on the bearing platform reinforcement cage; the manufactured bearing platform steel reinforcement framework is placed at the planned position in the bearing platform pit foundation, and then a pouring model corresponding to the bearing platform structure is installed according to the reference line; and the center main tower bearing platform, the auxiliary piers and the transition pier bearing platform are poured in a layered mode, and after the bearing platforms are maintained, the foundation pit needs to be backfilled with pit foundation excavation earthwork in time. The technical problem that the geological stability is poor when bearing platform construction is carried out on an inclined riverbed surface or a near abrupt slope can be solved, and the temperature in the bearing platform can be controlled.

The invention relates to the technical field of high-frequency preheating, and discloses a high-frequency preheating device for coating a multi-strand stranded enameled wire core, which comprises a main machine body, a preheating mechanism is arranged outside the main machine body, a mounting chamber is formed in the back surface of the main machine body, and a heat dissipation mechanism and an air guide mechanism are arranged inside the mounting chamber; the heat dissipation mechanism is used for conducting heat dissipation on the interior of the mounting chamber, the air guide mechanism is used for controlling the air outflow direction in the mounting chamber and controlling the air outlet to be switched between external air and the interior of the preheating mechanism, and a temperature sensor is fixedly connected to the interior of the mounting chamber; the preheating mechanism is used for preheating the metal wire core; by controlling the adjusting plate, the adjusting plate can conveniently and selectively seal the inner air cavity or the outer air cavity to adjust the air in the mounting chamber to flow out through the air outlet or flow out through the wire outlet through the outer thermal insulation box, so that different effects are achieved, the use flexibility of the device is effectively improved, and the use diversity of the device is effectively guaranteed.

The invention discloses a microalloyed high-toughness martensitic stainless steel cutter head as well as a preparation method and a preparation mold thereof. Stainless steel comprises the following components in percentage by weight: 0.3%-0.7% of C, 0.3%-1.0% of Si, 0.5%-1.5% of Mn, 16%-18.5% of Cr, 1%-2% of Ni, 0.3%-0.8% of Mo, 0.1%-0.35% of V, 0.1%-0.25% of Nb, less than or equal to 0.02% of S, less than or equal to 0.02% of P and the balance of Fe. Firstly, raw materials are smelted into molten iron; then adding a deoxidizing agent and precoated sand into the molten iron for molding, and performing sand mold casting and pouring to obtain a cutterhead blank; carrying out heat treatment on the cutter head blank; and finally, shot blasting and polishing are conducted on the cutterhead subjected to heat treatment. The martensitic stainless steel cutterhead has a metallographic structure which takes a martensitic structure as a main structure, takes austenite as an auxiliary structure and dispersedly distributes CrC, VC and NbC particles, the hardness of the martensitic stainless steel cutterhead is 40-45 HRC, the impact toughness of the martensitic stainless steel cutterhead reaches 92-95 J / cm < 2 >, the abrasion resistance of the cutterhead is longer, the service life of the cutterhead is longer, and the abrasion loss of the martensitic stainless steel cutterhead is reduced by 70% compared with a cutterhead without alloy elements.

The utility model provides a grain storage pipeline system of a grain blocking door of a squat silo. The grain storage pipeline system comprises a gas main pipeline, a circulation fan, a circulation pipeline and a nitrogen pipeline, and a PLC (Programmable Logic Controller) control unit is electrically connected with a temperature sensor, a humidity sensor, a nitrogen concentration sensor, a phosphine gas detector, the circulation fan, a first electric valve and a second electric valve respectively. When the temperature sensor and the humidity sensor detect that the temperature and the humidity of the grain blocking door are too high, high-temperature and high-humidity gas is exhausted out of the squat silo through the circulating fan; when the nitrogen concentration sensor detects that the nitrogen concentration of the grain blocking door is too low, the nitrogen concentration in the squat silo is discharged out of the squat silo through the gas main pipeline, and then the nitrogen is supplemented into the squat silo again through the nitrogen pipeline; in the fumigation period of the warehouse, when the phosphine gas detector detects that the concentration of the phosphine gas at the grain blocking door is too low, the low-concentration phosphine gas is pumped out through the circulation fan and led to the grain pile through the circulation pipeline, and the high-concentration phosphine gas in the grain pile flows back to the grain blocking door.

The utility model relates to the technical field of batteries, and discloses a battery and an electric device, which comprises at least two battery monomers, an electrode connecting piece and an external cooling device, each battery monomer comprises a shell and a pole arranged on the top cover, and the poles of at least two battery monomers are electrically connected through an electrode connecting piece; a built-in cooling device for accommodating a cooling medium is arranged in each battery monomer; the external cooling device is arranged between the shell of the battery monomer and the electrode connecting piece, and is at least in contact with one of the shell and the electrode connecting piece. The space between the shell and the electrode connecting piece is fully utilized, so that the space utilization rate is improved, energy density does not need to be sacrificed, and the temperature difference between the inside and the outside can be reduced and the performance of the battery monomer and the battery can be improved by directly radiating the inside and the outside of the battery monomer.

The invention relates to the technical field of concrete preparation, and particularly discloses mass concrete and a preparation method thereof. The concrete is prepared from the following raw materials in parts by weight: 330-450 parts of cement, 430-510 parts of fine aggregate, 1000-1200 parts of coarse aggregate, 3-9 parts of a viscosity reducer, 3-10 parts of an additive, 50-100 parts of fly ash and 5-15 parts of an MXene composite phase change material. By introducing the MXene composite phase change material, the internal and external temperature difference and the temperature peak value caused by heat release of hydration reaction of mass concrete before and in the middle period of curing are effectively reduced, so that the generation of temperature cracks is inhibited. In addition, the concrete effectively relieves temperature stress caused by uneven temperature distribution in a large-temperature-difference environment, and the volume stability of the structure is improved. The concrete has excellent working performance, weather resistance and construction performance, high early strength and stable performance.

The utility model discloses a tubular pile maintenance autoclave vacuum-pumping system which comprises an autoclave, the left end of the autoclave is communicated with an emptying pipe, a residual steam pipe and a steam pouring pipe in parallel, the top of the autoclave is provided with a steam inlet, the left side of the autoclave is provided with a vacuum pump, the air inlet end of the vacuum pump is communicated with the emptying pipe, and the air outlet end of the vacuum pump is communicated with the steam pouring pipe. A vacuum meter, a check valve and an air inlet valve are sequentially arranged on the pipeline between the vacuum pump and the emptying pipe, a bypass pipe is communicated with the pipeline between the vacuum pump and the vacuum meter, a safety net is arranged at the free end of the bypass pipe, and after gas in the autoclave is pumped out, the heat exchange rate can be greatly increased, and the loss of saturated steam is reduced.

The present invention belongs to the technical field of suture production, and in particular, relates to an integrated injection molding device for medical sutures with barbs, including a softening component, a cutting component, and a shaping component, etc. The softening component is used to soften a flat wire, the cutting component is used to stagger barbs on both sides of the softened flat wire, and the shaping component is used to round and shape the flat wire that has been processed with barbs. The present invention heats and softens the flat wire by the softening component, so that the cutter in the cutting component is more likely to cut barbs on the wire, and the strength requirements of the cutter are relatively low. At the same time, because the cutter cuts and processes barbs on the softened wire, the first electric push rod that drives the cutter only needs to consume less electricity and provide less power to achieve effective cutting of the wire by the cutter, thereby minimizing the volume of the first electric push rod as a driving structure, and effectively reducing the equipment cost on the basis of ensuring the demand.

This invention discloses an anti-condensation and diversion structure for cable branch boxes, belonging to the field of smart grid technology. It includes a cable branch outer box, within which a diversion hopper and a partitioned inner cavity are provided. The diversion hopper is located below the top of the partitioned inner cavity. This invention divides the upper part of the cable branch outer box into a double-layer structure through the partitioned inner cavity, effectively reducing the temperature difference between the inside and outside of the outer box and lowering the probability of condensation from the source. Combined with a heat-insulating and rainproof frame, it provides dual protection against rain and heat. When condensation occurs on the inner wall of the partitioned inner cavity, it is diverted by the diversion hopper and collected in a cleaning component, preventing condensation from dripping and corroding internal electrical components. Simultaneously, a dehumidification component filters and absorbs moisture from the outside air entering the cable branch outer box, effectively reducing moisture accumulation inside the outer box and comprehensively minimizing condensation, ensuring a dry and stable internal environment for outdoor power distribution equipment in the smart grid.

The present invention belongs to the technical field of waste heat recovery, and discloses a plant steam waste heat recovery and utilization system, including: a steam turbine; a generator and a compressor, which are coaxially connected to the steam turbine; the compressor is provided with a cooling cavity, and the steam inlet of the compressor is connected to the outlet of the cooling cavity; a steam pipeline, which is used to supply steam with waste heat and is connected to the inlet of the cooling cavity of the compressor; a pressure matcher; a low-pressure steam inlet valve, which is arranged between the cooling cavity of the compressor and the side steam inlet of the pressure matcher; a high-pressure steam inlet valve, which is arranged between the steam outlet of the compressor and the axial steam inlet of the pressure matcher; a bypass regulating valve, whose inlet is connected between the high-pressure steam inlet valve and the steam outlet of the compressor, and whose outlet is connected between the outlet of the pressure matcher and the steam inlet of the steam turbine. The present invention solves the problem that the existing steam waste heat recovery system can only convert the waste heat of steam into the heat of water for utilization, and cannot be converted into other energy forms, and has limitations.

The invention discloses a solar generator for reinforcing a low-energy or failure hot rod, which comprises a hot rod evaporator, a hot rod condenser is arranged at the top end of the hot rod evaporator, and a solar generator main body is arranged at the top end of the hot rod condenser. A combined connecting assembly is arranged between the bottom end of a shrinkage pipe opening and the top end of a hot rod condenser, and when a solar generator body is installed on a hot rod, a combined inserting pipe penetrates through a first connecting sleeve and is inserted into the top end of the interior of the hot rod condenser; after the second connecting sleeve and the first connecting sleeve are in butt joint, the fastening sleeve is tightened between the outer portion of the first connecting sleeve and the outer portion of the second connecting sleeve through threaded connection, the tightening degree of the fastening sleeve is limited through the positioning sealing plate, and meanwhile sealing treatment is conducted on the connecting position. In this way, the solar generator body can be installed at the top end of the hot bar condenser, and the solar generator can be detached conveniently, so that follow-up maintenance and replacement operation can be carried out conveniently.

The invention discloses a low-carbon mass concrete, which is composed of the following components by weight: 180-280 parts of cement, 50-80 parts of mineral powder, 40-50 parts of fly ash, 960-1000 parts of crushed stone, 750-850 parts of fully graded machine-made sand, 40-60 parts of heat storage particles, 7-9 parts of admixture, and 150-160 parts of water; the cement, fly ash, mineral powder, and fully graded machine-made sand are mixed and stirred to obtain a first mixture; the first mixture, the heat storage particles, and the crushed stone are mixed and stirred to obtain a second mixture; water and the admixture are mixed and added to the second mixture and stirred to obtain the low-carbon mass concrete; the invention adopts direct and indirect carbon reduction technologies, and reduces the amount of fly ash and cement in concrete, reduces CO2 emissions, reduces the risk of cracking of mass concrete due to temperature stress, and generates low-carbon mass concrete with good construction performance, high strength, strong durability, and not easy to crack.

The invention relates to the field of grain drying, in particular to a method for improving corn starch resistance through hot air and microwave combined drying. The method comprises the following steps: drying corn kernels with the moisture content of 22-30% by using microwaves and hot air at the same time; the method comprises the following steps: soaking dried corn kernels, extracting starch through a wet grinding procedure, and drying to obtain the high-resistance corn starch. The microwave enables the interior of the material to rise quickly, and hot air is combined for synergistic heating, so that drying uniformity and heat and mass transfer efficiency can be improved. Meanwhile, due to the combined action of heat and moisture, the starch structure is changed, so that the resistance of the starch is improved. The resistance of the corn starch is improved through drying processing, the subsequent tedious processing flow can be simplified, the production cost is reduced, and the method has remarkable energy-saving and environment-friendly advantages.

The invention relates to the technical field of U-shaped pipe machining, and provides a forming device for U-shaped pipe machining, a forming cavity is formed between an upper mold and a lower mold, a mold core frame is movably arranged on a sliding table, a mold core assembly comprises two sets of separable mold cores, the separable mold cores are arranged on the mold core frame, and the two sets of separable mold cores enter or retreat from the two ends of the forming cavity correspondingly. The medium supply device is arranged on the sliding table and used for enabling the two sets of split mold cores to be matched to form a complete mold core or releasing matching and splitting the mold core, the split mold cores are provided with through holes, after the two sets of split mold cores are matched to form the complete mold core, the through holes in the two sets of split mold cores are communicated to form a medium conveying channel, and the medium supply device is arranged on the sliding table. The two ends of the medium conveying channel are connected with the medium supply device so that circulation can be formed in the medium conveying channel. By means of the technical scheme, the problems that in the prior art, due to the fact that a U-shaped pipe is large in bending degree and complex in structure, raw materials are not prone to flowing stably, and a cavity is not prone to being evenly filled are solved.

The invention discloses a porous partition plate structure for improving temperature difference inside and outside glass liquid in an optical glass platinum channel, which comprises a platinum material channel, and two ends of the platinum material channel are provided with ports for the glass liquid to enter and exit; the isolation pieces are arranged in the platinum material channel in a linear array mode; and the operation hole groove is formed in the separator and is used for circulation of molten glass, and relates to the technical field of optical glass manufacturing. Through the arrangement of the multiple groups of circulating groove holes in the partition plate, the fluid characteristics of molten glass in the non-flow direction can be improved, namely, corresponding temperature and speed differences are reduced, and the multiple groups of circulating groove holes in the partition plate have a redistribution effect on the molten glass during circulation, so that the internal and external temperature difference of the molten glass can be further reduced; the clarifying and homogenizing effects of the clarifying section are integrally improved, the overall platinum structural strength of the section can be improved due to the arrangement of the partition plates in the flow channel, and particularly, the sinking deformation resisting capacity of the pipe body is enhanced.

The utility model relates to the technical field of cooling of rubber products, and discloses a cooling device for rubber products, which comprises a cooling box, a cavity is formed in the cooling box, an air hole piece is installed in the cavity, the cavity is divided into a cooling chamber and an overflowing chamber by the air hole piece, an air fanning piece which rotationally penetrates through the air hole piece and extends into the overflowing chamber is arranged in the overflowing chamber, and a spraying piece communicated with the cooling chamber is installed on the side face of the cooling box; a water tank is installed at the bottom of the cooling box, a water supply piece used for guiding and conveying a water source to the spraying piece and the overflowing cavity is installed on the water tank, and the bottom of the cooling box is connected with a communicating pipe communicating with the overflowing cavity and the water tank. The utility model provides a cooling device for a rubber product, and solves the problems that the temperature difference between the surface and the interior of the rubber product is large, thermal stress is generated, and the rubber product cracks and deforms due to direct water cooling of the rubber product.

The invention relates to the technical field of duplex stainless steel bar forging, in particular to a forging process of a super duplex stainless steel S32760 large-wall-thickness bar, which comprises the following steps: S1, collecting data and constructing a forging simulation model: collecting previous forging data, and constructing the forging simulation model through a finite element technology; s2, proper materials are selected to be made into steel billets, specifically, the materials are selected according to the machining requirement of a to-be-forged bar, and the materials are melted; through anvil block preheating and temperature control in each step in the forging process, the internal and external temperature difference of the forge piece is delayed, the cracking tendency of the forge piece is reduced, and no obvious forging crack is generated on the surface; the final forging temperature is guaranteed to be larger than or equal to 950 DEG C, the forging ratio is increased, grains are refined, and UT detection is free of defects; in addition, the transfer speed during quenching is controlled, and no sigma brittle phase is generated in the structure. The S32760 round bar with the diameter of 260 circles produced by the process has no cracking phenomenon, the T / 4 and T / 2 transverse and longitudinal low-temperature impact of the forged piece subjected to heat treatment exceeds 100J, and the transverse spot corrosion performance is qualified.

The invention discloses a production and manufacturing method based on an F22 horizontal Christmas tree for deep sea, and relates to the field of production and manufacturing of Christmas trees, the production and manufacturing method comprises the following operation steps: S1, billet selection: billet materials comprise C; mn; p; s; si; cr; ni; mo; cu; as; sn; sb; v; a gas element H; a gas element O; a gas element N; fE; impurity elements; s2, cogging and forging; s3, pre-heat treatment; and S4, heat treatment. According to the production and manufacturing method based on the F22 horizontal Christmas tree for deep sea, through anvil block preheating and temperature control in each step in the forging process, the internal and external temperature difference of the forge piece is delayed, so that the cracking tendency of the forge piece is reduced, and no obvious forging crack is generated on the surface of the forge piece; it is guaranteed that the finish forging temperature is larger than or equal to 850 DEG C, the method has the advantages that the forging ratio is increased, grains are refined, and UT detection is free of defects, the surface of a horizontal Christmas tree body produced through the technology is free of cracking, the forged piece dissection after heat treatment meets the NACE standard, and the grain size grade is larger than 8 grade.

The invention relates to the technical field of aluminum profile extrusion dies, in particular to a continuous aluminum profile extrusion die for a multi-cavity ultra-thin-walled tube and an upper and lower die closing method thereof.The continuous aluminum profile extrusion die comprises an upper die and a lower die, the lower end of the upper die is connected with the lower die through a pin hole and a positioning pin, and a disassembly groove is formed in the edge of the lower end of the upper die; a positioning table is fixedly connected between the bottoms of the pin holes; the positioning pin comprises a pin body, and an adjusting mechanism is installed on the inner side of the pin body through a driving mechanism. The pin body comprises a cylindrical shell, a hollow hole is formed in the upper end of the cylindrical shell, a bottom hole is formed in the bottom end of the cylindrical shell, and side square holes annularly distributed at equal intervals are formed in the outer side of the cylindrical shell. According to the multi-cavity ultra-thin-walled tube mold, after mold closing of the upper mold and the lower mold is about to be completed, the transverse pressure of the adjusting plate is utilized to make contact with the pin holes, positioning is achieved, pin abrasion caused by pulling and inserting can be effectively avoided, then deviation caused by mold closing of the upper mold and the lower mold can be avoided, and the quality of a multi-cavity ultra-thin-walled tube can be effectively improved.

The present invention provides a cable sheath extrusion device and an extrusion method thereof, belonging to the technical field of cable sheaths. The cable sheath extrusion device comprises a base, an extrusion mechanism and a cleaning mechanism. A support is installed on the surface of the base, a loading bin is installed on the surface of the support, and the extrusion mechanism is installed on the surface of the base. The extrusion mechanism comprises a feed pipe, a molding box and an extrusion cavity, and the feed pipe is installed in the inner cavity of the support. The present invention sets an extrusion mechanism, and a first motor can drive the conveying shaft and the conveying blade to rotate, and the feed pipe is synchronously heated by a heating pipe to melt the raw material, and the molten raw material is filtered through a filter plate, and then the raw material is extruded through the extrusion cavity and coated on the surface of the cable to realize the extrusion of the cable sheath; at the same time, when the conveying shaft rotates, it can synchronously drive the two grinding rollers to rotate, and drive the grinding rollers to rotate synchronously through the meshing first gear and the first gear ring, grind the unmelted impurities on the surface of the filter plate, and ensure the quality of the cable sheath.

The utility model belongs to the technical field of electric automobile charging piles, and discloses a rainproof and dehumidifying electric automobile charging pile which comprises a charging pile body, a charging plug is installed on one side of the charging pile body, and a trapezoidal protective shell is installed at the position, located on the peripheral side of the charging plug, of one side of the charging pile body. A turnover plate is installed on the side, away from the charging pile body, of the trapezoidal protection shell through a rotating shaft, a plurality of ventilation openings are symmetrically formed in the two sides of the charging pile body, inclined water baffles are installed at the positions, over the ventilation openings, of the two sides of the charging pile body, and a mounting groove is formed in the charging pile body. According to the device, when the charging plug is idle, the charging plug can be isolated and protected, and meanwhile, water accumulated in the charging pile body can be absorbed and discharged, so that the safety of the charging pile body during use is ensured, the service life of the charging pile body is prolonged, and the use experience of a user is improved.

The utility model relates to the technical field of heat dissipation of electronic equipment, in particular to a novel battery water cooling plate which comprises a shell and a fractal flow channel, the shell is made of aluminum, heat-conducting glue is arranged on the surface of the shell, and a fractal flow channel is formed in the shell; the fractal flow channel is divided into a liquid inlet, a liquid outlet and a three-stage flow channel network, and the liquid inlet is communicated with the liquid outlet through the three-stage flow channel network, so that the water-cooling plate realizes the uniformity of pressure distribution of the flow channels in the water-cooling plate through the design of the fractal flow channel, and further ensures the uniformity of flowing of cooling liquid; meanwhile, the heat dissipation effect of the water cooling plate is improved through the fractal flow channels, and the temperature difference between the inside and the outside of the battery pack is reduced.

The invention relates to the technical field of sewage treatment plants, and discloses the following steps: selecting late-strength low-heat ordinary Portland cement or coal mine cement with the grade of 42.5 or above; a high-efficiency water reducing agent or a composite additive with a high-efficiency water reducing function and a high-performance expanding agent are added in concrete preparation; clean coarse aggregate with good natural continuous grading quantity is selected as the coarse aggregate to prepare concrete. The high-efficiency retarding type water reducing agent is adopted, so that the absolute cement consumption and water consumption are reduced, the workability and the pumpability of the concrete are improved, and the retarding time is prolonged; the high-performance expanding agent is doped, so that the concrete generates moderate expansion, and the stress structure in the concrete is changed to offset the tensile stress generated by shrinkage in the concrete hardening process, thereby avoiding or greatly reducing the cracking of the reinforced concrete structure; and a proper amount of mineral mixing materials such as high-quality fly ash and slag are doped to reduce the cement consumption, so that the total hydration heat of the cement is reduced, and cracks are reduced.

The invention belongs to the technical field of heat treatment of stainless steel pipes, in particular to a heat treatment process of austenitic stainless steel pipes, S1, preheating the stainless steel pipe to 850°C to 1050°C within the phase change temperature range; S2, performing phase change induced plastic heat treatment, inducing austenite to transform into martensite by controlling the cooling rate at 20°C / s to 50°C / s, while maintaining a certain proportion of residual austenite; S3, using ultrasonic auxiliary heating with a frequency of 20kHz to 1MHz, and an ultrasonic power density of 0.1W / cm 2 ~1W / cm 2 ; S4. High-frequency induction heating is adopted with a frequency range of 20kHz to 500kHz. The pipe is evenly heated by the induction coil. The heating rate is controlled at 100℃ / min to 500℃ / min, and the heating temperature range is 900℃ to 1100℃; S5. The heat treatment process is carried out in a controllable environment, and the gas flow rate is adjusted at 5L / min to 50L / min; S6. An infrared temperature sensor is configured based on the Internet of Things, and the heating and insulation parameters are monitored in real time and dynamically adjusted through the big data analysis module.

The present invention discloses a vehicle window defogger device based on the water vapor liquefaction principle, comprising a vehicle door, a vehicle window body is arranged on the side wall of the vehicle door, a permanent magnet is embedded in the side wall of the vehicle door, two symmetrically distributed slide grooves are arranged on the side wall of the vehicle door, a slide plate is slidably connected to the side wall of the slide groove, an electromagnet is embedded in the side wall of the slide plate, the S pole of the electromagnet is opposite to the S pole of the permanent magnet, a first electric contact is arranged on the side wall of the vehicle door, a second electric contact is arranged on the side wall of the vehicle door, a placement groove is opened on the side wall of the vehicle door, a sponge is placed on the bottom side wall of the placement groove, and the placement groove is located at the lower end of the vehicle window body. The present invention relates to the field of automobile equipment technology, and uses an electromagnet to generate magnetic force, and the permanent magnet and the electromagnet are opposite to each other with the same pole, so that when water mist is attached, the electromagnet is energized to push the water mist into the sponge.

The utility model discloses a pole piece drying device and battery production equipment. The pole piece drying device comprises a laser mechanism and an infrared mechanism, wherein the laser mechanism is used for heating a pole piece to a set temperature; and the infrared mechanism is arranged at the downstream of the laser mechanism, the infrared mechanism comprises two infrared plates, the two infrared plates are oppositely arranged at an interval, a material passing gap for the pole piece to pass through is defined between the two infrared plates, and each infrared plate can emit infrared light towards the pole piece. According to the pole piece drying device, rapid heating is conducted through the laser mechanism, continuous heat preservation is conducted through the infrared mechanism, and therefore the pole piece drying treatment time can be greatly shortened, and the pole piece production efficiency is greatly improved.

The application discloses a kind of nano self-repairing concrete waterproofing agent and preparation method thereof, belong to concrete admixture technical field.The application is aimed at the pain point that existing waterproofing agent is single function, full-cycle protection is missing, long-acting is insufficient, construction compatibility is poor, constructs crystalline impermeability, nano self-repairing, phase change temperature control, and four-meshed collaborative system of workability optimization, is compounded by ammonium sulfate, iron sulfate, modified nanometer silicon dioxide, mesoporous silica slow-release carrier, phase change paraffin microemulsion and the like component, is prepared using step dispersion process.The product can reduce hydration temperature rise peak value 8-12 DEG C under 0.5% admixture, 28d impermeability grade reaches P12, 0.4mm crack repair rate is greater than or equal to 92%, self-repairing effective period is extended by more than 5 times, simultaneously adapts two kinds of mainstream construction technology, is suitable for the full-cycle waterproofing of various complex engineering scenes.