13results about How to "Effective cost control" patented technology

The sealing material guiding device comprises a material collecting part and a material guiding part which are connected in sequence, the end, corresponding to the upstream, of the material collecting part is provided with a feeding port, and the end, corresponding to the downstream, of the material guiding part is provided with a discharging port; the discharge port is configured to correspond to the position of the conveying line; the material guiding part comprises a feeding channel and a material crushing assembly movably arranged in the feeding channel. The material crushing assembly can impact large coal in the feeding channel through self movement to crush the large coal into small coal, and the small coal leaves the feeding channel from the window body under the pushing of the material crushing assembly, so that the problem of space blockage caused by the large coal is solved; the effects of cleaning large coal materials and smoothing the conveying line can be achieved, the requirements for equipment parameters such as power of related components of the material crushing assembly can be lowered, therefore, the equipment cost is effectively controlled, the cost lowering effect is remarkable, low cost of overall transformation of the conveying line is achieved, and the technology can be applied and popularized easily.

The utility model discloses a modularization easy maintenance electric energy meter belongs to the electric energy meter technical field, the electric energy meter comprises a support seat, a metering module, a communication module, a display module and a connecting assembly, one side of the support seat is hinged with a protective cover, one side of the support seat is fixedly provided with a connecting seat, the top end of the connecting seat is provided with a plurality of installing grooves, and the installing grooves are connected with the connecting seat. The metering module, the communication module and the display module are slidably mounted in the corresponding mounting grooves, and the connecting assembly is composed of first connecting parts arranged at the bottom ends of the inner walls of the mounting grooves and second connecting parts arranged at the bottom ends of the metering module, the communication module and the display module. And the first connecting part and the second connecting part are inserted and electrically connected. The electric energy meter is convenient to maintain and flexible in function.

The invention discloses a method for preparing trehalose from purple ears, a purple ear strain is a high-temperature type agaric and is preserved in Guangdong Microbiological Culture Collection Center (GDMCC), the preservation number is GDMCC NO: 62288, and the method comprises the following steps: (1) extracting crushed purple ear sporocarp by adopting an organic solvent, concentrating the obtained extract liquid, adding a concentrated solution into a concentrated solution, and concentrating the concentrated solution to obtain a concentrated solution; carrying out liquid-liquid extraction by using ethyl acetate, water and n-butyl alcohol in sequence, collecting an n-butyl alcohol phase, and dehydrating and concentrating to obtain an organic crude extract; and (2) dissolving the extract obtained in the step (1), and purifying through reverse phase silica gel column chromatography, gel exclusion column chromatography and normal phase silica gel column chromatography in sequence to obtain the trehalose. The extraction and purification process provided by the invention does not need a complex enzyme catalysis or fermentation step, so that the use of an expensive enzyme preparation is avoided.

The invention relates to the technical field of thermal power equipment, and discloses a peripheral multi-column steel frame of a washing and absorbing two-tower-in-one structure, which comprises a steel column inner frame, a steel column outer frame and a horizontal support structure: the steel column outer frame and the steel column inner frame are both of a square frame structure; the steel column inner frame and the steel column outer frame are each of a multi-layer frame structure, each layer of frame is formed by horizontally splicing multiple sections of steel beams, and the adjacent layers of frames are vertically connected through stand columns. The steel column inner frame is arranged on the outer side of the center tower in a surrounding mode, and the steel column outer frame is arranged on the outer side of the steel column inner frame in a surrounding mode. The steel column inner frame and the steel column outer frame are connected and fixed through a horizontal supporting structure. Each layer of filler in the central tower and the pipelines outside the tower transmit loads to the peripheral multi-column steel frame; the tower can be used for bearing the load transmitted by the central tower while realizing the integrated arrangement of the water washing tower and the absorption tower, can effectively reduce the wall thickness of the tower wall, reduces the occupied area, increases the height and capacity of the tower, reduces the construction cost, and can flexibly adjust the corresponding height.

The invention discloses a cascade multi-level energy storage converter topology and a control method thereof, the DC input side of the topology adopts half-bridge sub-modules powered by independent batteries to be connected in series in groups, and the AC output side adopts multiple groups of H-bridge inversion units to be connected in series to form a secondary cascade structure. According to the topology, by flexibly configuring the number of battery packs and the number of half-bridge sub-modules in each group, the optimal balance between the number of switching devices and the voltage stress of the devices is realized, and the topology has the advantages of a cascaded H-bridge topology and a cascaded half-bridge topology. In the control method level, a switching device is controlled based on carrier stacking modulation and zero crossing point modulation, a double-closed-loop quasi-proportional resonance controller is adopted to carry out closed-loop control on an output voltage waveform, an equalization algorithm based on battery state parameter sorting is combined, high-quality multi-level output is achieved, and meanwhile battery online energy equalization is completed. The problems that a multi-level energy storage converter is large in traditional topology device number, high in cost, large in high-voltage device stress, poor in expansibility, difficult in battery management and the like are solved.

The invention relates to the technical field of thermal power equipment, and discloses a peripheral sparse column steel frame of a washing and absorbing two-tower-in-one structure, which comprises a steel column inner frame, a steel column outer frame and a horizontal support structure: the steel column outer frame and the steel column inner frame are both of a square frame structure, and the horizontal section is rectangular; the central tower is arranged in the peripheral sparse column steel frame; the steel column inner frame is arranged on the outer side of the center tower in a surrounding mode, and the steel column outer frame is arranged on the outer side of the steel column inner frame in a surrounding mode. The steel column inner frame and the steel column outer frame are connected and fixed through a horizontal supporting structure. A plurality of rows of horizontal platforms and a plurality of columns of steel latticed columns are arranged on the peripheral sparse column steel frame, and a large cubic space is formed between the two rows of horizontal platforms and the two columns of steel latticed columns; and each layer of filler in the central tower and the pipelines outside the tower transmit loads to the peripheral sparse column steel frame. According to the invention, the occupied area is reduced, the height and the capacity of the tower are increased and the like while the water washing tower and the absorption tower are integrally arranged, the space is relatively wide, and the possibility of collision with a pipeline can be reduced.

This invention belongs to the field of surface polishing technology, and relates to a water-based polishing wax and its preparation method. The water-based polishing wax comprises a first component and a second component. The water-based polishing wax is formed by mixing a slurry of the first component and a viscous liquid of the second component. The first component includes liquid paraffin, glycerin, Tween, acrylic resin, gloss agent, silica micropowder, hydroxyl silicone oil, dispersant, silicon carbide, cerium oxide, and deionized water. The second component includes an acrylic thickener and deionized water. This invention provides a water-based polishing wax with extremely low VOC content, no irritating odor, reduces the risk of thermal damage to the substrate, and improves the surface microstructure quality, as well as its preparation method.

This invention discloses a high-toughness, weather-resistant sheet molding compound and its preparation method, belonging to the field of fiber-reinforced composite materials technology. The composite material, by weight, comprises: 38-45 parts of a matrix resin composed of unsaturated polyester resin, vinyl ester resin, and carboxyl-terminated nitrile butadiene rubber; 32-38 parts of reinforcing fibers consisting of a mixture of glass fibers and basalt fibers with a length of 5-7 mm; 22-28 parts of filler; 2.5-3.5 parts of a curing system; and 6-8 parts of functional additives containing a core-shell toughening agent, a 1:1 mixture of benzotriazole and hindered phenols, and an anti-aging agent. The preparation method includes resin matrix preparation, slurry mixing, impregnation and curing, and hot-pressing curing. This invention solves the technical problem of balancing high toughness and long-term weather resistance in the field of sheet molding compounds through the triple synergy of resin toughening, particle toughening, and fiber reinforcement, as well as the time-complementary protection of the anti-aging agent. It is suitable for harsh environments such as electrical equipment housings and rail transit components.

A traction lifting type building mechanical and electrical installation operation platform comprises a movable base, a lifting platform and a winch, the winch is arranged in the middle of the movable base, two n-shaped fixing supports are symmetrically arranged at the two ends of the movable base, the fixing supports are perpendicularly and fixedly connected with the movable base, and first-stage supports are arranged in the fixing supports; second-stage supports are arranged in the first-stage support, the lifting platform is arranged between the two second-stage supports, and a traction mechanism connected with a winch is arranged among the fixed support, the first-stage support, the second-stage supports and the lifting platform. According to the traction lifting type building mechanical and electrical installation operation platform, the platform can be driven to ascend and descend in a multi-stage mode only through a winch and a rope, the overall cost of the platform can be effectively controlled, a driving mechanism and a lifting mechanism do not need to be stacked, the overall weight is reduced, rapid transfer of the platform on a construction site is facilitated, and the mechanical and electrical installation efficiency is improved.

Single-phase full-bridge intelligent power module based on gallium nitride power chip and manufacturing method, including ceramic substrate, power chip, drive chip, power copper surface, decoupling capacitor, printed circuit board and shell; a plurality of power copper surfaces are arranged on the ceramic substrate, gaps are left between adjacent power copper surfaces, the decoupling capacitor and the power chip are arranged on the power copper surface; the printed circuit board is covered on the ceramic substrate, and a plurality of drive chips are arranged on the printed circuit board; the ceramic substrate, the power chip, the drive chip, the power copper surface, the decoupling capacitor and the printed circuit board are arranged in the shell. The processing flow designed by the application is easy to realize the automation of power module processing and preparation, effectively reduces the preparation steps of the power module, improves the yield of the power module preparation, and the raw material cost of processing and use is low, effectively controls the production cost of the power module. At the same time, the preparation process can guarantee the electrical insulation performance and the reliability of the electrical bonding connection in the power module.

The invention provides a recycling method of a lithium iron phosphate battery positive electrode material. The method comprises the following steps: mixing a lithium iron phosphate battery positive electrode material roasted in an inert atmosphere with an alkaline solution with the pH value of 14.2-14.6 according to a liquid-solid volume mass ratio of 30-50 mL / g, leaching at a first temperature, leaching at a second temperature, separating to obtain a leaching solution and ferroferric oxide, adjusting the pH value of the leaching solution to 11.5-13.5, heating to 70-110 DEG C, aging and precipitating lithium, and filtering to obtain the lithium iron phosphate battery positive electrode material. And separating to obtain lithium phosphate and lithium precipitation mother liquor. Wherein the first temperature is 25-45 DEG C, and the second temperature is 5-20 DEG C lower than the first temperature. According to the method, an alkali leaching lithium extraction-lithium precipitation process is adopted, and the liquid-solid ratio is combined with pH and temperature regulation and control, so that efficient leaching of lithium and phosphorus is realized, and lithium phosphate and ferroferric oxide are synchronously recovered. The lithium precipitation reagent is not additionally introduced, the whole process is simple, efficient and green, and the method has important significance on sustainable development of the new energy industry.

The utility model discloses a kind of air conditioner suspension mounting structures, including cabinet, at least two hooks, cabinet has bottom shell, top shell and two side surface shells, bottom shell, top shell and two side surface shells are quadrilateral arrangement, each side surface shell is connected and fixed with bottom shell, top shell, wherein, at least one side of side surface shell is arranged with at least two reinforcing pieces, the first end of reinforcing piece is close to bottom shell and is fixedly connected with bottom shell, the second end of reinforcing piece is close to top shell;At least two hooks and all reinforcing pieces one-to-one correspond, wherein, the second end of hook and corresponding reinforcing piece, corresponding side surface shell three are fixedly connected by first threaded fastener.The utility model provides a kind of air conditioner suspension mounting structure, with higher anti-deformation ability and carrying capacity, and the thickness of the top shell of cabinet and two side surface shells can be designed thinner, be favorable to control cost.

The application belongs to the field of semiconductor MEMS device processing, and particularly relates to a structure-assisted electromagnetic MEMS micromirror processing method, which improves the problems of high processing complexity and high processing cost existing in the prior art. By using the schemes of selective silicon-silicon bonding after local roughening, thick silicon MEMS processing technology based on conventional silicon-silicon bonding, fusion of high-precision laser cutting in the MEMS processing flow, increase of temporary support and heat dissipation structure and the like, the dependence of the MEMS micromirror processing process on the temporary bonding and debonding equipment and technology required for wafer processing can be reduced, the machine time occupation of the single crystal silicon dry etching equipment is reduced, the processing cost is controlled, the mutual compatibility of each single-step process in the process flow is improved, the processing can be realized only by using the combination of conventional equipment and its process, the complexity of the processing process is reduced, the processing cost is reduced, and the electromagnetic MEMS micromirror has good manufacturability.