8results about How to "Reduce the temperature difference between inside and outside" patented technology

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.

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 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 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.

The application belongs to the field of metallurgy, and discloses a high-nitrogen austenitic gas valve steel wire rod and a manufacturing method thereof. The manufacturing method comprises the following steps: heating a 21-4N initial-rolled square billet after being ground; sequentially performing rough rolling, medium rolling, fine rolling and high-speed water-penetrating rolling on the heated 21-4N initial-rolled square billet to obtain a wire rod; and performing yarn laying and air cooling on the wire rod to obtain a disc round product. The application adopts a high-temperature soaking mode to heat the rolled steel billet, and reduces the temperature difference between the inside and outside of the rolled steel billet during rolling, thereby improving the hot working plasticity of the 21-4N, avoiding the generation of disc round surface cracks, and improving the disc round surface quality. The high-speed wire rod adopts water-penetrating temperature control rolling, and the yarn laying is followed by air cooling for rapid cooling, so as to ensure that the internal grain size and lamellar precipitates of the wire rod are qualified.

This invention provides a method for regenerating honeycomb activated carbon, comprising: (1) chemical cleaning: ultrasonic cleaning using a composite cleaning solution containing organic acid and low molecular weight polyethylene glycol; (2) structural repair: immersing the cleaned activated carbon in a repair solution containing carbon precursor and high molecular weight polyethylene glycol; (3) microwave regeneration: microwave heating under non-oxidizing gas protection, followed by cooling to obtain regenerated honeycomb activated carbon. This invention improves cleaning efficiency by using low molecular weight polyethylene glycol to assist the cleaning solution in entering hydrophobic micropores; and selectively retaining high molecular weight polyethylene glycol in microcracks and mesopores through a compounding process with the carbon precursor, resulting in in-situ deposition to fill microcracks and repair structural defects after carbonization. This invention features low regeneration temperature, minimal damage to the honeycomb structure, and a regeneration recovery rate of over 90% for specific surface area and over 88% for axial compressive strength, significantly extending the cycle life of the honeycomb activated carbon.

This utility model discloses an outdoor electromagnetic lock with an outer protective cover, including a semi-open protective cover. Two semi-open protective covers are inserted and sealed to the outside of the outdoor electromagnetic lock. A sealing rubber plug ring is set at the reset knob on the outdoor electromagnetic lock, and a sealing gasket is set at the latch on the outdoor electromagnetic lock. A foam layer is filled between the two semi-open protective covers and the outdoor electromagnetic lock. This utility model has a semi-open protective cover, a sealing rubber plug ring, and a sealing gasket. The foam layer fills the space between the two semi-open protective covers and the outdoor electromagnetic lock. The sealing rubber plug ring and the sealing gasket seal the connection between the reset knob and the latch and the semi-open protective cover, providing all-round sealing protection for the outdoor electromagnetic lock. This reduces the corrosion and impact of moisture and dust particles on the outdoor electromagnetic lock's extension and contraction stroke. The filling of the foam layer improves the sealing performance and ensures the normal use of the outdoor electromagnetic lock.

The utility model discloses a polyester pre-oriented yarn (POY) drying box with an intra-cavity heat circulation assembly, and relates to the technical field of polyester production, the polyester pre-oriented yarn drying box comprises a drying box main body, an adjusting mechanism is arranged on the outer side of the drying box main body, and the adjusting mechanism comprises a telescopic assembly which comprises two gears rotationally installed in the drying box main body, according to the device, during excessive drying, a servo motor is used for driving the gears to rotate, the two toothed plates synchronously and relatively move, the distance between the limiting shafts is shortened, and therefore the drying efficiency is improved. The conveying length and the drying time of the polyester pre-oriented yarn in the drying box are reduced; when drying is insufficient, the distance is increased through reverse adjustment, the requirement for drying the polyester pre-oriented yarn is flexibly met, the problem of excessive drying or insufficient drying is effectively solved, and the drying quality of the polyester pre-oriented yarn is guaranteed.