7results about How to "Increase ascent speed" patented technology

This invention discloses a method for controlling the nitrogen content of molten steel in a converter with low iron consumption mode, belonging to the field of steel manufacturing technology. The method includes the following steps: controlling the molten iron inlet temperature to 1310-1330℃, controlling the silicon content in the molten iron to 0.30%-0.50%, controlling the molten iron charging ratio to 65-70%, and the scrap steel charging ratio to 30-35%; controlling the converter iron-to-steel ratio to 720-750 kg / t; after adding scrap steel into the furnace, shaking the furnace back and forth until the furnace mouth flame is normal, and baking the scrap steel; adding 50% of the slag in the first 4 minutes of the converter blowing process, and then adding the remaining slag in small amounts multiple times over 4-8 minutes, controlling the furnace temperature, and stirring the molten pool back and forth from high to low with an oxygen lance before the end point; using nitrogen-argon switching bottom blowing during the converter blowing process; adding ladle slag modifier before tapping, and then adding deoxidizer for alloying, while simultaneously performing ladle bottom blowing with argon. The control method of the present invention can control the nitrogen content of converter steel to within 40 ppm under the condition that the iron-to-steel ratio in the converter is as low as 720-750 kg / t.

This invention discloses a fluid flow drag-reducing electrolyzer, comprising an electrolyzer frame and two electrodes, two guide plates, and a diaphragm installed and tightly fitted together within the frame. The electrolyzer frame has an inlet at its bottom and an outlet at its top. The two electrodes are symmetrically distributed on both sides of the diaphragm; each electrode is flattened by rolling. The two guide plates are symmetrically distributed on both sides of the diaphragm and located outside the corresponding electrodes. Each guide plate has multiple guide grooves arranged radially along its diagonal and parallel lines near the corresponding electrode. By optimizing the electrode thickness and its internal fluid channel design, this invention reduces the flow resistance of the electrolyte in the electrode region, improves electrolyte renewal efficiency, and enhances the overall operating performance of the electrolyzer.

The utility model relates to a bridge wet joint construction template hoisting tool, which belongs to the technical field of bridge construction tools and comprises a first wheel carrier, a second wheel carrier, a first rope winding machine, a second rope winding machine, a first hoisting rope and a second hoisting rope, the first hoisting rope and the second hoisting rope are arranged in parallel, and the first rope winding machine and the second rope winding machine are respectively fixed on the first wheel carrier and the second wheel carrier. One end of the first lifting rope is detachably connected to the first wheel carrier; one end of the second lifting rope is detachably connected to the second wheel frame, and the other end of the second lifting rope is fixed to the winding part of the first rope winding machine. And the wet joint template is arranged on the first lifting rope and the second lifting rope. The first wheel frame and the second wheel frame stretch across the two adjacent beam plates, then the other end of the first lifting rope is fixed to the winding part of the second rope winding machine, the other end of the second lifting rope is fixed to the winding part of the first rope winding machine, manpower can be reduced, the wet joint formwork can be stably lifted, the lifting speed of the wet joint formwork is increased, and the working efficiency is improved. The construction period is shortened, and the hoisting construction effect of the wet joint formwork is improved.

This invention provides a method for one-time pouring of the dam overflow surface. The dam or overflow section is divided into a modified concrete zone, a first roller-compacted concrete zone, a second roller-compacted concrete zone, and an erosion-resistant and wear-resistant concrete zone, based on the upstream to downstream cross-section. Construction is carried out in the modified concrete zone, the first roller-compacted concrete zone, and the second roller-compacted concrete zone. After the second roller-compacted concrete is constructed, its right end slopes downwards to form a step on the surface overflow surface. Then, the erosion-resistant and wear-resistant concrete zone is poured in one go. The construction process of the erosion-resistant and wear-resistant concrete zone includes the following steps: S1, foundation treatment; S2, rebar tying; S3, formwork installation; S4, concrete pouring; S5, formwork removal; S6, concrete finishing; S7, concrete curing. This method for one-time pouring of the dam overflow surface improves the construction quality of the dam overflow surface by pouring the erosion-resistant and wear-resistant concrete in one go after the roller-compacted concrete construction is completed.

The utility model discloses a tensile testing technical field's thermoplastic material tensile detection device, including, shell, clamping component, temperature control assembly, motor and screw rod, be provided with baffle in the shell, divide the shell into upper chamber and lower chamber, clamping component sets up in the upper chamber for clamping thermoplastic material sample, motor sets up in the lower chamber for driving the rotation of screw rod, drives the movement of a part in clamping component, temperature control assembly is used for adjusting and maintaining the constant temperature inside the upper chamber, the utility model discloses adopt upper and lower clamping main body cooperation trapezoidal groove structure, and combine the linkage clamping mechanism of rotatable connecting plate and clamping block, through telescopic link control clamping block along the sliding of inclined plane, realize the adaptive clamping of sample, make clamping block have the same clamping force, through the replacement into the clamping block of same size with sample size, can effectively prevent the sample clamping slip or clamping break problem caused by uneven clamping force, improved the reliability and test repeatability of clamping.

The application provides a switch frequency determination method and device for an LCC resonant converter, the method comprising: obtaining an input voltage and an output voltage of the LCC resonant converter; determining a starting mode in which the LCC resonant converter is currently located by using the output voltage; determining a calculation program corresponding to the starting mode by using the starting mode in which the LCC resonant converter is currently located, wherein the calculation program is an operation logic program designed for the starting mode by using a field programmable logic gate array; inputting the input voltage and the output voltage into the field programmable logic gate array, and calculating the switch frequency of the LCC resonant converter by using the calculation program, so that the switch frequency determination method improves the adjustment rate of the switch frequency of the LCC resonant converter, the rising speed of the output voltage, and further improves the dynamic response speed of an existing power supply.

The utility model relates to wind power demonstration device technical field, concretely relates to a kind of range hood wind power demonstration device, including ground cabinet, stove installed on ground cabinet, smoke generating device for simulating oil fume installed on stove, vertical installation surface located at the back of ground cabinet, range hood installed on vertical installation surface;Smoke generating device includes: container assembly, including detachably installed on stove solution tray and the sealing cover covering its top;By integrated piezoelectric ceramic atomizing sheet and accurate metering liquid supply system, controllable smoke is stably generated, combined with venturi exhaust pipe group with tapering throat and 12 ° diffusion angle and fan, the directivity and rising speed of smoke are significantly improved;Twelve spouts of inner and outer double-ring distribution cooperate with adjustable air deflector, can high-fidelity simulate multi-source real oil fume diffusion form, intuitively and dynamically show the trapping efficiency and wind power distribution effect of range hood to different position oil fume.