10results about How to "Reduce gas content" patented technology

The application relates to a preparation method of a ferrite-martensite dual-phase steel, which comprises the steps of converter smelting, LF furnace refining, RH refining, tundish treatment and continuous casting, and through controlling specific parameters in each existing step, cooperating with the setting of a continuous casting protective slag and the specific smelting steel grade component content, the ferrite-martensite dual-phase steel can reduce the steel slag reactivity and has good lubricity in the continuous casting process, so that the continuous casting is ensured to be smooth.

The application discloses a kind of high-purity rare earth weathering bridge steel manufacturing method, comprising the following steps: S1, preparing raw materials;S2, impurity analysis and preparation;S3, vacuum induction furnace initial refining N;S4, vacuum induction furnace first material and refining;S5, vacuum induction furnace second material and charging adjustment;S6, vacuum induction furnace temperature adjustment and Ce;S7, cooling to form alloy ingot.The application uses vacuum electromagnetic induction melting process, improves alloy purity through high-purity raw materials and reasonable preparation process and process parameter control, and adds rare earth elements, and then significantly improves the strength, tensile and weathering performance of bridge steel.

The utility model discloses a motorcycle outer covering part injection mold with a cavity efficient exhaust system, which relates to the technical field of injection molds and comprises a lower mold, an upper mold and an exhaust component. An upper mold is installed above the lower mold, an exhaust assembly is installed between the lower mold and the upper mold, multiple sets of mold cavities are formed in the lower mold, multiple sets of injection molding cavities matched with the mold cavities are formed in the lower surface of the upper mold, the exhaust assembly comprises an exhaust plate, and an exhaust channel is formed in the outer wall of the exhaust plate. An exhaust extension frame is installed at the position, close to the die cavity, of the exhaust channel, and a plurality of exhaust through holes communicating the die cavity with the exhaust channel are formed in the outer wall of the exhaust extension frame. The problems that when an existing injection mold is used, although the existing injection mold is provided with an exhaust structure, the whole mold needs to be greatly changed through the exhaust structure, the mold needs to be rebuilt, and the cost is high are solved.

The application discloses a preparation method of high-density low-oxygen low-inclusion copper-chromium alloy contact material, which uses copper-tellurium alloy rods and high-purity degassed chromium blanks as raw materials, adopts high-purity rare earth lanthanum with a purity of 99.99%, and adopts a vacuum induction melting process to improve the uniformity and grain refinement degree of the copper-chromium-tellurium alloy, wherein the tellurium element is added in the form of copper-tellurium alloy rods, so that the volatilization of tellurium can be reduced, the uniformity of tellurium in the alloy ingot is ensured, and the copper-tellurium phase particle size is refined; the high-purity degassed chromium blank is used as the raw material to reduce the gas content and impurity content of the alloy ingot; the addition of the rare earth material La reduces the gas content of the alloy ingot and the metallographic impurity elements, and is beneficial to improving the comprehensive use performance of the copper-chromium-tellurium contact material; and the copper-chromium alloy prepared by the method has low gas content, dense structure, uniform composition, high purity, and is a high-quality and high-performance vacuum switch contact material.

This application relates to the technical field of ring main units, and discloses a primary and secondary integrated ring main unit with an adaptive intelligent anti-condensation system. The unit includes a housing with a placement slot, a cable compartment, and a control compartment. A first heat dissipation hole communicating with the placement slot is located on the side of the housing. A fan is located within the placement slot. The control compartment communicates with the first heat dissipation hole. A movable pipe communicating with the placement slot is located within the cable compartment, with the opening of the movable pipe located on the side of the control compartment near the fan. This application utilizes the mixing of outside air with humid air from the cable compartment. On one hand, the humid air directly participates in the heat exchange of the heating elements in the control compartment, carrying away heat. On the other hand, water vapor in the mixed gas, when flowing past the heating elements, can also absorb some heat due to its phase change (if it occurs) or its high specific heat capacity, further improving the heat dissipation effect of the control compartment.

The application relates to the technical field of new energy automobile battery replacement, and specifically discloses a lock body mechanism for new energy automobile battery replacement, which comprises a fixed shell, a nut connected to the inner side of the lower end of the fixed shell through a bearing, and a clamping spring arranged in the inner side of the lower end of the fixed shell. A drop-proof ring is in contact with and supports the upper surface of the clamping spring. A supporting spring is arranged on the outer side of the nut between the upper surface of the drop-proof ring and the lower surface of the upper end of the nut. A pneumatic sealing mechanism is installed on the nut. The upper end of the fixed shell is fixedly connected with a guide pipe coaxial with the fixed shell. The inner side of the guide pipe is provided with guide grooves at equal angles. A fixing bolt penetrates through the guide pipe. The application can prevent dust and sand from entering the thread structure between the fixing bolt and the nut, thereby ensuring that the fixing bolt and the nut can stably and effectively work.

This invention relates to the field of gas control technology in the re-mining of abandoned coal resources. It proposes a gas control method for the underground layout of roadways in the mining of abandoned coal pillar resources. Before re-mining, a hierarchical analysis method is used to conduct a gas risk assessment, quantify the risk, and classify the gas control levels. During tunneling, inorganic flexible foamed materials are sprayed onto the surrounding rock of the roadway to achieve physical isolation. Simultaneously, the ventilation system is optimized, employing a one-master-multiple-slave local ventilation fan group control strategy based on gas concentration feedback. After the working face is formed, cross-layer boreholes are drilled for pre-extraction of gas before long-term mining. During long-term mining, high-level boreholes are arranged in the conveyor belt roadway to extract gas for decompression. Stepping-type extraction pipelines are installed in the return air corners to control corner gas. A safety monitoring system is installed throughout the process to monitor harmful gases, and high-pressure water jet slit cutting technology is prepared as a permeability enhancement measure. This effectively reduces gas content and pressure, prevents gas accumulation and explosion, and ensures the safe and efficient re-mining of abandoned coal pillar resources.

This invention discloses a two-phase jet morphology capture device under a backpressure rupture accident, comprising a high-pressure water tank, a heating rod, a plunger pump, a quick-opening valve, a test nozzle, a visualization backpressure container, an exhaust valve, a backpressure valve, and a high-speed camera. First, the plunger pump pressurizes the high-pressure water tank, and the built-in heating rod heats the medium inside the tank. The jet is then discharged via a quick-opening valve. A visualization backpressure container is used, and the high-speed camera captures the morphology of the rupture jet within the container, transmitting the data to a computer. The test nozzle is located inside the visualization backpressure container. Two backpressure valves are installed at the lower end of the container, and the backpressure inside the container is adjusted by the valve opening to meet the high backpressure test requirements. An exhaust valve is installed at the top of the container to precisely adjust the backpressure and discharge phase-change vapor, reducing the gas content and further lowering the backpressure.

The invention relates to the technical field of grouting equipment, in particular to grouting construction equipment for hydraulic engineering, which comprises a base, a discharging box is mounted at the upper end of the base, a slurry discharging assembly is arranged in the discharging box, a mixing box is rotatably connected in the discharging box through a rotating pipe, a pair of mixing grooves is formed in the mixing box, and a mixing assembly is arranged in the mixing box. The mixing assembly comprises a stirring mechanism and a scraping mechanism, the stirring mechanism comprises connecting rods, connecting shafts, stirring blades, transmission gears and sliding rods, the pair of connecting rods are rotationally connected into the mixing box, the connecting shafts are rotationally connected into the connecting rods, the stirring blades are installed on the end faces of the connecting shafts, and the transmission gears are installed on the circumferential surfaces of the connecting shafts; the sliding rod is connected into the connecting rod in a sliding mode, a plurality of transmission racks are installed on the circumferential face of the sliding rod, and the transmission racks are all meshed with the transmission gear. Through the effect of the mixing assembly, slurry production has continuity, the discharging requirement of the slurry discharging assembly is met, and the working efficiency is remarkably improved.

This utility model discloses an oil injection system for CT X-ray tubes, belonging to the field of medical device technology. The oil injection system includes an oil storage tank, an ultrasonic gas separator, a vacuum negative pressure device, and an oil circulation device. The oil storage tank stores insulating oil; the ultrasonic gas separator is connected to the oil storage tank and is configured to remove gas from the insulating oil; the vacuum negative pressure device has a movable CT X-ray tube inside its cavity, connected to the ultrasonic gas separator, and connected to a negative pressure generator, configured to reduce the gas content inside the CT X-ray tube; the oil circulation device forms an oil injection circuit by connecting the CT X-ray tube and the oil storage tank, allowing insulating oil to be injected into the CT X-ray tube. Before being injected into the CT X-ray tube, the insulating oil passes through the ultrasonic gas separator, which removes gas from the insulating oil, thereby reducing the gas content and improving the imaging geometric accuracy of the CT X-ray tube.