10results about How to "Avoid local concentration" patented technology

This utility model discloses an integrated transition yaw connection system for wind turbines, belonging to the technical field of wind power generation equipment. The system includes a wind turbine tower, a slewing bearing, a short-section cylinder, and a lower platform. The wind turbine tower has a truss-type hollow structure. The short-section cylinder is vertically arranged and its top is welded to the lower platform as a whole. Its bottom is connected to the top of the tower through the slewing bearing. This utility model uses a hierarchical structure of truss tower-slewing bearing-short-section cylinder-platform. It utilizes the short-section cylinder to distribute the nacelle load and compensate for installation errors. Combined with the slewing bearing, it achieves low-friction and stable yaw. This structure effectively solves the problems of heavy self-weight, obvious yaw vibration, complex assembly, and easy wear of connection parts of traditional wind turbine towers. It has the advantages of lightweight, stable yaw, convenient installation, and long service life.

The utility model discloses a mixing-free feeding machine which comprises a top plate, a plurality of stock bins are placed on the top of the top plate, an electric push rod is fixedly connected to the top of the top plate, a plurality of annular grooves are formed in the top of the top plate, and annular butt joint blocks are connected to the inner walls of the annular grooves in a sliding mode. The tops of the multiple annular butt joint blocks are fixedly connected with the bottoms of the multiple stock bins correspondingly, and butt joint pipes fixedly communicate with the bottoms of the multiple stock bins. The proportion of various additives and PE particles is accurately controlled through the multi-petal butterfly valve, independent metering and discharging are achieved, uniform distribution of materials can be guaranteed without premixing, and the production efficiency is improved; under the rotation action of the spiral blades, materials are uniformly dispersed and fall, accumulation or local concentration is avoided, and meanwhile the blocking risk is reduced; the stock bin can be independently detached and cleaned, the discharging pipe, the conical flow collecting bin and other structures can be completely exposed, residues can be thoroughly cleaned conveniently, and cross contamination is avoided.

The invention relates to the technical field of castable, in particular to high-performance tundish cover castable based on high-aluminum ceramic chip recycled aggregate and a preparation method of the high-performance tundish cover castable. The castable comprises high-aluminum ceramic chip recycled aggregate, modified hollow alumina microspheres, andalusite and other components, and through roasting stabilization treatment of the recycled aggregate and multi-layer coating modification of the microspheres, the problems of poor heat preservation property and concentrated thermal stress caused by high doping amount of the recycled aggregate are solved. The andalusite cooperates with the modified microbeads to optimize aggregate-andalusite-microbead three-phase interface combination by virtue of the low-expansion characteristic and the active surface, so that the thermal shock resistance and the structural compactness are enhanced. The product has excellent heat preservation and heat insulation performance, high strength and slag corrosion resistance, resource efficient utilization of waste high-aluminum ceramic chips is achieved, and the service life of the tundish cover is prolonged.

The utility model discloses a deburring device for plastic meal box processing, including conveyer belt, the outside of conveyer belt is sequentially provided with refrigeration mechanism and shot blasting mechanism, the refrigeration bin is fixed in the conveyer belt outer frame, and the liquid nitrogen tank is located the refrigeration bin rear and is connected to the refrigeration bin inside through the conveying pipeline, and the electric control valve is installed on the conveying pipeline, and the inner wall fixed cooling box of refrigeration bin is equipped with the screen plate in the lower end of cooling box, the shot blasting bin is fixed in the conveyer belt outer frame of refrigeration bin right side, and the drive motor is installed on the upper end of shot blasting bin and is connected centrifugal fan, and the deburring device for plastic meal box processing is additionally provided with refrigeration mechanism and shot blasting mechanism, and the precision temperature control and energy consumption optimization of low temperature embrittlement are realized to the collaborative cooling design of refrigeration mechanism through metal cooling box and screen plate, and the high coverage impact of spiral conveying structure and pneumatic shot blasting structure ensures burr removal efficiency and pellet circulation economy, and the both cooperation significantly improves the yield rate and production efficiency of plastic meal box deburring process.

The invention discloses a blasting device and method adaptive to porous loose lithology, and belongs to the technical field of mine construction. A blasting device adaptive to porous loose lithology comprises an isolation sleeve arranged in a drill hole of a porous loose rock mass in a penetrating mode, and further comprises a blasting assembly, and the blasting assembly comprises a high-flowability mixed explosive, an initiating explosive package and a digital electronic detonator; the explosive charging assembly is movably arranged in the isolation sleeve; and an orifice closure; according to the invention, a double-closed structure is formed by the blockages and the isolation sleeve, so that the blasting energy is effectively restrained, and the crushing efficiency of the porous loose rock mass is obviously improved; the isolating sleeve physically isolates the hole wall, so that the problem of collapsing, burying and blocking charging is effectively solved; the high-flowability mixed explosive is adopted and matched with the long and narrow space of the sleeve, uniform filling is achieved, and uneven energy is avoided; and meanwhile, through the combination of the digital electronic detonator and the initiating explosive package, accurate time sequence initiation and detonation sufficiency are ensured, and the initiation reliability is comprehensively improved.

The invention discloses a gallium nitride device and a preparation method thereof, and relates to the technical field of semiconductor devices. The gallium nitride device comprises a sapphire substrate, an AlN nucleating layer, an N-type AlGaN buffer layer, an intrinsic AlGaN active layer, an electron blocking layer and a P-type AlGaN layer which are sequentially stacked from bottom to top, a gradient doping edge stop layer is arranged on the edge of the P-type AlGaN layer, and meanwhile a bottom electrode in ohmic contact with the N-type AlGaN buffer layer and a top electrode in ohmic contact with the P-type AlGaN layer are formed respectively. According to the invention, by optimizing the structural design of the substrate, the nucleating layer, the buffer layer, the active layer, the electron blocking layer, the edge termination layer and the electrode, and combining with the seagull optimization algorithm to accurately regulate and control the preparation process parameters, the comprehensive improvement of the light extraction efficiency, the carrier recombination efficiency, the breakdown voltage and the long-term working stability is realized; and the photoelectric property and the reliability of the gallium nitride device are obviously enhanced.

The utility model provides a kind of metal cans for microwave heating, including can body and by the sparkproof base of elastic plastic, the accommodating cavity of upper end opening is equipped in the inside of sparkproof base;Accommodating cavity inside wall is equipped with fixed support structure and adjustable support structure;Fixed support structure is located below adjustable support structure;When adjustable support structure is concave, the support surface of flatness is formed in top portion, the utility model does not need to develop special base, can be adapted to different height, diameter specification's metal cans, substantially improve product versatility, solve the problem that traditional technology is difficult to compatible multiple categories of cans, meet the demand of industry to high adaptability, safe and reliable microwave heating cans matching assembly, while save the step of consumer transfer food material, improve the convenience of microwave heating use.

The utility model relates to the technical field of dried orange peel processing, and discloses a mixing machine for raw material powder, which comprises a supporting seat serving as a supporting main body, a mixing barrel is rotatably connected to the inner wall of the supporting seat, a protection box is fixedly connected to the top end of the mixing barrel, a first motor is fixedly connected to the top end of the protection box, and a second motor is fixedly connected to the top end of the protection box. The driving end of the first motor penetrates through the protection box and is fixedly connected with a rotating rod, the rotating rod is connected with a rotating shaft through a driving assembly, and the outer walls of the rotating rod and the rotating shaft are fixedly connected with a plurality of mixing plates. According to the powder mixing device, the first motor drives the rotating rod, the rotating rod drives the rotating shaft through the driving assembly, the rotating rod and the rotating shaft drive the mixing plate to mix materials, then the second motor drives the worm, the worm drives the worm gear, and the worm gear drives the mixing barrel to rotate, so that powder in different areas can be in full contact and exchange positions; the phenomenon of local concentration or layering of the powder is avoided, and the mixing uniformity is ensured.

The utility model discloses a double -deck rubber band, solve the problem that current product double -deck structure is actually simple superposition, tenacity and strength are insufficient. The rubber band includes double -deck muscle and both sides reinforcing rib, the first layer muscle film and the second layer muscle film of double -deck muscle realize molecular chain crosslinking through arc strength film, and arc strength film adopts gradient vulcanization process and forms covalent bond connection, promotes interlayer peeling strength to 4.5N / mm, solves interlayer peeling problem. The reinforcing rib is composed of arc reinforcing sheet, first reinforcing strip, second reinforcing strip and reinforcing column, forms the three -dimensional support system similar to " I -steel ", and reinforcing column is evenly distributed in double -deck muscle both sides, and the stress is dispersed when drawing, and local strain is reduced. This design makes the rubber band breaking elongation reach 800%-1000%, and the fatigue life is improved by more than 5 times, is applicable to industrial packaging, sports training and other high -frequency tensile scene, and the mechanical property is enhanced significantly.

The invention belongs to the technical field of vinyl chloride preparation, and particularly relates to a process method for producing cross-linked PVC (polyvinyl chloride) from a vinyl chloride monomer. The method comprises the following steps: by taking triallyl isocyanurate as a cross-linking agent, carrying out suspension polymerization reaction on the cross-linking agent, a compound initiator consisting of azodiisobutyronitrile and tert-butyl peroxybenzoate, a compound dispersant consisting of methyl cellulose and lauryl sodium sulfate, and a refined vinyl chloride monomer; and after the reaction is finished, carrying out heat treatment on the product under a reduced pressure condition to obtain the cross-linked PVC product. Through optimized raw material systems and process conditions, effective regulation and control of the crosslinking process are realized, and the problems of non-uniform crosslinking, serious degradation and the like in the prior art are solved. The crosslinking degree of the prepared product is 18-32%, the heat resistance and the mechanical property are remarkably improved, and the process is stable and suitable for industrial production.