59results about How to "Not easy to cause shedding" patented technology

The invention relates to a hydrogen resistant coating system and a preparation method thereof, in particular to a hydrogen resistant coating system containing Er2O3 and a preparation method thereof. The coating takes activated martensite steel or austenitic steel as a basal body on which Fe-Er is taken as a metal transition layer coated with Er2O3 coating. The preparation method comprises: preparing Fe-Er alloy on the basal body by a vapor phase deposition method, and preparing the Er2O3 layer on the metal transition layer by the vapor phase deposition method.

The invention discloses a flame-retardant cellulosic fiber and a preparation method. The preparation method comprises the steps of preparation of flame-retardant cellulose ester and preparation of the flame-retardant cellulosic fiber, wherein in the step of preparing flame-retardant cellulose ester, cellulose with a certain degree of polymerization is dissolved into a N,N-dimethylacetamide / lithium chloride or ionic liquid solvent, a flame retardant containing carboxyl is added, the components are stirred, a sulfonyl chloride compound serving as an activating agent is added, and the reaction is carried out at 30-80 DEG C for 12-48 hours to prepare the flame-retardant cellulose ester, wherein the mass ratio of the cellulose to the solvent is 1:99 to 25:75, the molar ratio of the cellulose to the flame retardant is 1:1 to 1:6, and the molar ratio of the flame retardant to the activating agent is 1:1; in the step of preparing the flame-retardant cellulosic fiber, the product is blended with cellulose acetate or cellulose, and then the flame-retardant cellulosic fiber is prepared by a dry-wet spinning process, wherein the concentration of spinning liquid is 12-30 percent, and the mass ratio of the flame-retardant cellulose ester to cellulose acetate or cellulose is 5:1 to 29:1. The flame-retardant cellulosic fiber is high in thermal stability and has a flame-retardant effect permanently; during flame retardance, toxic gas is not generated, and an environment protection requirement is met.

The invention belongs to the technical field of nanometer porous materials, and particularly relates to a gas separation functional material, and a preparation method and application thereof. The functional material comprises aqueous inorganic nanoparticles, monodisperse aqueous polymer microspheres and a nonessential auxiliary agent, wherein functional modification groups capable of being combined with gas molecules are modified on the surfaces of the polymer microspheres or (and) the inorganic nanoparticles; a polymer / inorganic nanoparticle composite emulsion with adsorbable gas functional modification groups can be obtained by adopting an in situ polymerization method or a blending method; and after the moisture is volatilized, the polymer and the inorganic nanoparticles are self-assembled to form the gas separation functional material with a nanometer porous structure. The method and the application realize identification, adsorption and adsorption-desorption adjustment of the nanometer porous structure to gas molecules if CO2, H2S, SO2, HCl, Cl2, NO2, H2O, NH3 and the like by regulating and controlling the types of the polymer or (and) the inorganic nanoparticles, the particle diameters and the bore diameters of the functional modification groups, the microspheres and the inorganic nanoparticles on the surface, and the like.

The invention relates to a tissue engineering meniscus repair sheet and a preparation method thereof. The prepared tissue engineering meniscus repair sheet comprises an acellular meniscal thin sheet, seed cells and growth factor slow-release carriers, wherein blind micro vias are uniformly distributed on two surfaces of the acellular meniscal thin sheet, and the seed cells and the growth factor slow-release carriers are combined on two surfaces of the acellular meniscal thin sheet. The blind micro vias distributed on the acellular meniscal thin sheet increase the area of a support material, and can be used as a storage pool of the seed cells and the growth factor slow-release carriers, so that the seed cells and the growth factor slow-release carriers can be firmly attached and are not easy to fall off. Nutrition can be persistently released through the slow-release carrier by multiple growth factors, the cell amplification efficiency is improved, the cell phenotype is also maintained, cell ageing is inhibited, and fusion of the tissue engineering meniscus repair sheet and self tissue is promoted. The prepared tissue engineering meniscus repair sheet has the structure characteristic similar to the structure characteristic of natural meniscus, and is applicable to repair meniscus injure and induce regeneration of meniscus fibrous cartilage tissue.

The invention relates to a machining clamp for clamping a workpiece. The workpiece comprises a shell and an inner cavity formed in the shell. The inner wall of the inner cavity is in an irregular shape. The machining clamp comprises a base, a supporting table, a supporting nozzle and a drive assembly, the supporting table is arranged on the base, the supporting nozzle is arranged on the supportingtable and comprises a fixing piece and at least two supporting blocks arranged on the fixing piece, and a through hole is formed between the two supporting blocks. The drive assembly can be insertedin the through hole to drive at least two supporting blocks to expand so as to abut against the inner wall of the inner cavity of the workpiece. The faces, used for being attached to the inner wall ofthe inner cavity of the workpiece, of the supporting blocks correspond to the inner wall of the inner cavity so that profiling positioning can be formed. The profiling positioning manner is adopted,the workpiece can be prevented from rotating relative to the supporting nozzle, the supporting force, to the inner wall of the inner cavity, through the supporting nozzle is more uniform, and the supporting stability is improved.

The embodiment of the invention provides a display device and a display method. The provided display device comprises a fixation unit, a processing unit, an image transmission unit, a display unit and a connection unit. The display device can be worn on the head through the fixation unit; the processing unit is arranged for obtaining a first image to be displayed; the image transmission unit is arranged for transmitting the first image to the display unit; the display unit is arranged for displaying the first image obtained by an image processing part; and the connection unit is arranged for connecting the fixation unit with the display unit, wherein the connection unit has a first state and a second state, the connection unit, at the first state, enables at least an first portion in the display unit to have first position relationship relative to the fixation unit, and the connection unit, at the second state, enables the display unit to have second position relationship relative to the fixation unit.

The invention relates to an automatic limiting and looseness-resisting fastening assembly and belongs to the technical field of fastening connection. The automatic limiting and looseness-resisting fastening assembly comprises a limiting sleeve, a locating sleeve and a bolt. The front portion of the limiting sleeve is provided with an opening, and the back portion of the limiting sleeve is provided with a screwdriver insertion hole. The locating sleeve is of a hollow cylinder structure. The front end of the locating sleeve is provided with a small-diameter insertion end. The back end of the locating sleeve is fixedly connected with the front portion of the limiting sleeve. A limiting cavity is formed in the limiting sleeve. The threaded end of the bolt is inserted into the locating sleeve. The nut end of the bolt is located in the limiting cavity. A spring is arranged between the nut and the locating sleeve. The diameter of the screwdriver insertion hole is smaller than that of the nut. The automatic limiting and looseness-resisting fastening assembly has the beneficial effects that the bolt is not prone to disengagement in the mounting and dismounting process, the connected bolt can be positioned in an equipment installation hole, and the connection efficiency between external threads of the bolt and structure internal threads is improved; and when the bolt is dismounted, the bolt is jacked out by the spring through resilience force, tactile feedback is provided for an operator, so that the operator knows that dismounting is completed, and naked-eye observation is not needed.

The invention discloses photovoltaic support color steel tile profile and fixture. The photovoltaic support color steel tile profile and fixture comprise a beam and a permanent seat, the permanent seat is connected with the upper part of the beam through a round internal hexagon, a first round square neck bolt connecting pair is arranged at the upper end of the beam, a second round square neck bolt connecting pair is arranged at the lower end of the beam, a color steel tile fixing fixture fastener is firmly arranged below the beam through the second round square neck bolt connecting pair, an intermediate press block is firmly arranged above the beam through the first round square neck bolt connecting pair, and an end press block is arranged above the intermediate press block. The photovoltaic support color steel tile profile and fixture are simple in structure, elaborate in design and convenient to operate, the production cost is lowered, a connecting structure between a left permanent seat and a right permanent seat is firm, the permanent seats are difficult to fall off, the working performance of the fixture is guaranteed, the whole fixture does not shake, the stability is high, a worker can quickly and conveniently mount the fixture on the color steel tile to more effectively, safely and conveniently fix a rail, and the working efficiency is greatly improved.

Provided is a cutting tool having a cutting blade part made of a cBN sintered compact and a WC-based cemented carbide tool body, the blade part and the body being joined with a brazing material for joining interposed therebetween. In this cutting tool, the cBN-sintered-compact cutting blade part and the WC-based cemented carbide tool body are joined using a brazing material for joining containing, in terms of percent by mass, 35-40% of Ti, 35-40% of Zr, and 5-15% of Ni, the balance comprising Cu and unavoidable impurities.

The invention relates to the field of synthesized fibers and discloses a preparation method of modified polyester cellosilk. The preparation method comprises the following steps: coating and curing polyester cellosilk with a resin coating; and then carrying out a thermal treatment process. The resin coating is prepared by stirring and mixing epoxy resin with a curing agent in a weight ratio of 100: (50-100). In the thermal treatment, the temperature is controlled at 100-180 DEG C and the time is controlled at 10-30 min. The modified polyester cellosilk has the characteristics of being low in elongation at break, hard to deform and the like. The modified polyester cellosilk is spun to prepare polyester fiber cloth for coastal reclamation, so that the coastal reclamation effect is good and the cost is low.

The invention relates to an automobile strengthening beam. The strengthening beam structure for an automobile front wall comprises a cross beam which is in a tubular structure and comprises a left supporting section, a front wall supporting section and a right supporting section, wherein the three sections are connected in a U shape, the left supporting section is detachably connected onto a left panel of the automobile, the right supporting section is detachably connected onto a right panel of the automobile, and the front wall supporting section is detachably connected onto a front panel of the automobile. The strengthening beam structure for the automobile front wall is high in strength, convenient to mount and dismantle, and solves the problems of poor strength and inconvenient mounting and dismounting of the existing front panel strengthening beam structure for strengthening the front panel.

The invention relates to the field of grounding wire equipment, and provides a magnetically fixed grounding wire clamp, comprising a jaw-type grounding wire clamp head and an insulating operation lever, wherein the insulating operation lever is provided with a clamping section, and the insulating operation lever is rotatably connected with the grounding wire clamp head through the clamping section; The clamping section is provided with a transverse bar made of metal material, the length of the transverse bar is larger than the opening of the ground wire clip, and the ground wire clip head is provided with a magnetic part for absorbing the transverse bar. At the same time, an elastic machine part is pre-pressed between the clamping section and the ground wire chuck, and the elastic machinepart has a vertical upward force on the clamping section and a rotational force rotate around the clamping section. The invention has the advantages of simple structure, convenient operation, quick installation and dismantling of the grounding wire, high working efficiency, direct shortening of the power outage time and reduction of the customer loss caused by the power outage. Moreover, through the principle of magnetism and elasticity, fix the overhead line is fixed to ensure the complete grounding wire, thereby not being easy to cause falling off, effectively protecting the safety of operators.

The invention relates to the synthetic fiber field and particularly discloses a preparation method of a modified polyester fiber filament. The preparation method comprises the steps of coating a polyester fiber filament with a modified resin coating, and carrying out curing and thermal treatment, wherein the modified resin coating is prepared by the steps of stirring and mixing epoxy resin with acoating agent in a weight ratio of 100 to (50-100), and adding 2%-10% of quartz sand; and the temperature of the thermal treatment is controlled at 100-180 DEG C, and the time of the thermal treatmentis controlled at 10-30 minutes. The obtained modified polyester fiber filament has the characteristics of low breaking elongation rate, difficulty in deformation and the like; and modified polyesterfiber cloth spun by virtue of the modified polyester fiber filament is specially applied to sea reclamation, the sea reclamation effect is good, and the cost is low.

The invention provides a direct-current storage battery carrying and stair climbing device. According to the technical scheme, a frame with a lifting mechanism is adopted for bearing a storage battery, and therefore load-bearing stair climbing movement is completed instead of manpower; specifically, a storage battery tray and a storage battery fixing plate are correspondingly fixed at the front end of a basic frame, and a binding belt is combined to play a role in fixing the storage battery; on the rear side of the basic frame, two S-shaped supporting arms are driven by a gear motor to rotatealternately, so that the walking mode of a human body is simulated, stair climbing movement is formed, and compared with vertical lifting of a conventional straight supporting arm, the stair climbingmode is small in vibration and better in stability; the gear motor is powered by a lithium battery, and the lithium battery can be designed into a detachable structure, so that the lithium battery canbe detached for independent charging after the electric quantity is exhausted, and continuous operation of the device can be ensured by replacing the battery; and the device is particularly suitablefor carrying work of a transformer substation storage battery, manpower can be effectively saved, and the engineering implementation efficiency is fully improved.

The invention discloses an oil-immersed distribution transformer convenient for oil injection, and belongs to the field of oil-immersed transformers. According to the scheme of the oil-immersed distribution transformer convenient for oil injection, in the oil injection process, transformer oil enters a transition chamber through an exchange hole and an elastic fiber cluster, the communicated compartments formed by a straight part and a three-dimensional spiral part in the elastic fiber cluster can effectively buffer the transformer oil, the situation that the flowing speed of the transformer oil is too high is avoided, bubbles are not prone to being formed, meanwhile, the bubbles existing in the transformer can be cut and broken through the straight part, the three-dimensional spiral part and a prefabricated groove, and the bubble removing effect is achieved. In the process of replacing the transformer oil of the oil-immersed transformer, bubbles are not prone to being generated, normal work of the oil-immersed transformer is not prone to being affected, damage caused by overheating of the oil-immersed transformer is not prone to being caused, breakdown of the transformer oil is not prone to being caused, and normal use of the oil-immersed transformer is not prone to being affected.

The invention discloses anti-aging gloss oil for a liquor box, relating to the technical field of printing. The anti-aging gloss oil comprises the following raw materials in parts by weight: 30-50 parts of unsaturated double-chain acrylic resin, 20-35 parts of active monomers, 25-30 parts of photoinitiators, 5-10 parts of defoaming agents, 2-7 parts of leveling agents, and 20-30 parts of anti-aging agents. By taking lipid substances as active ingredients, the anti-aging gloss oil for the liquor box is low in cost, and damp-proof after being used for the liquid box, the gloss oil is difficult to fall when liquor spills, the anti-aging agent is added into the raw materials, so that the gloss oil can be prevented from being oxidized and causing the reduction of glossiness.

The invention discloses a building external wall concrete insulation board and a preparation process of the building external wall concrete insulation board, and belongs to the technical field of building insulation boards. The steel bar buckling body is composed of upper glass fiber gridding cloth, lower glass fiber gridding cloth and steel bar columns, wherein the upper glass fiber gridding cloth and the lower glass fiber gridding cloth are distributed up and down, and the steel bar columns are annularly connected to the outer side of the upper glass fiber gridding cloth and the outer side of the upper glass fiber gridding cloth. The upper ends and the lower ends of the multiple steel bar buckling bodies are connected into the concrete base layer and the exterior mortar layer in an embedded mode correspondingly, the concrete base layer and the exterior mortar layer can be fused and bonded at the hollowed-out positions of the steel bar buckling bodies, and the mixed heat preservationlayer is anchored between the concrete base layer and the exterior mortar layer. The stability of connection between every two of the mixed heat preservation layer, the concrete base layer and the exterior mortar layer is effectively improved, the overall mechanical strength of the heat preservation plate is effectively enhanced, and falling of the external wall heat preservation structure is notlikely to be caused.

The invention relates to the technical field of fixtures, in particular to a crankshaft processing fixture, which has a rectangular fixture body arranged opposite to the balance weight of the flying shear crankshaft. There are two fixed threaded holes located on both sides of the clamping through hole symmetrically in the width direction of the rectangular fixture body, and there are also provided in the thickness direction of the rectangular fixture body corresponding to the position of the four-jaw chuck. The corresponding fixing through hole and the correction through hole on a straight line with the major axis of the flying shear crankshaft. The fixture can control the quality and cycle of crankshaft processing and reduce the cost.

The invention relates to a cooling fan which comprises a cylindrical hub (2) and a plurality of rotating fan blades (3). The cylindrical hub is combined with a driving shaft of a driving motor, the rotating fan blades are arranged on the peripheral surface of the hub (2) in a radial manner and connected with the hub (2), and a wind shielding ring (1) is arranged outside the radial fan blades (3) and used for improving rotating rigidity and reducing deformation. The cooling fan is characterized in that the fan blades at the combined positions between all fan blades (3) and the outer peripheral surface of the hub (2) are asymmetrically distributed in a variable-angle manner, the effect of generating low noise and large flow is achieved, and the NVH performance is improved on the base of guaranteeing large flow.

The invention relates to the technical field of medical equipment, in particular to a convenient-to-use novel newborn breathing device. The convenient-to-use novel newborn breathing device comprises amachine body and a tray, wherein the machine body comprises a rack; rotating wheels are fixedly connected to the bottom end of the rack; the tray is fixedly connected to the surface of the rack; a supporting disc is fixedly connected to the top end of the rack; a rotating mechanism is arranged on the surface of the rack; the rotating mechanism comprises a rotating drum; the surface of the rack isfixedly connected with the rotating drum; the inner side of the rotating drum is movably connected with a supporting rod; the bottom end of the supporting rod is fixedly connected with a rotating disc; a fixing groove is formed in the inner side of the rotating drum; and a connecting rod is connected to the inner side of a connecting groove in a sliding mode. Angle rotation of the equipment is facilitated, operation of the equipment in a narrow space and monitoring of data of the equipment are facilitated, and due to the fact that a pipeline is fixedly connected with the equipment, falling ofthe pipeline is not likely to be caused, and the use stability of a nasal plug is not affected.

The invention provides a needle thrusting structure for grasping an SMC sheet material. The needle thrusting structure comprises a grasping device, wherein the grasping device is composed of a supporting unit, an isolation unit, a material grasping unit and a driving unit, the supporting unit comprises a triangular bracket, two groups of slideways are symmetrically arranged on the inclined planeson both sides of the triangular bracket, the material grasping unit comprises two needle claw assemblies, the driving unit comprises an air cylinder, an output shaft of the air cylinder pushes the twoneedle claw assemblies to be slidably connected to the two groups of slideways, the isolation unit comprises a partition plate, a sensing unit is arranged on the partition plate, and the sensing unitcomprises an infrared sensor. According to the needle thrusting structure, it can be guaranteed that the material delivery precision is higher through an automatic feeding method, the delivery time is greatly shortened, compared with a manual feeding method, the efficiency is effectively improved, the working environment is good, direct high-temperature contact is avoided, and the health of the staff is ensured.

The invention relates to the synthetic fiber field and particularly relates to a preparation method of a modified polyester fiber filament. The preparation method is characterized by comprising the step of carrying out thermal treatment on a polyester fiber filament, wherein the temperature of the thermal treatment is controlled at 100-180 DEG C, and the time of the thermal treatment is controlledat 10-30 minutes. The obtained modified polyester fiber filament has the characteristics of low breaking elongation rate, difficulty in deformation and the like; and modified polyester fiber cloth spun by virtue of the modified polyester fiber filament is specially applied to sea reclamation, the sea reclamation effect is good, and the cost is low.

The invention discloses a normal school student teaching ability evaluation system, and belongs to the field of teaching, in a teaching simulation process of a user, a microphone main body records audio frequency information in the simulation teaching process of the user, uploads the audio frequency information to a processing terminal, and compares the audio frequency information with keywords in previous audio frequency data, so that the audio frequency information can be evaluated. When the audio frequency input by the microphone main body does not mention keywords for a long time, a deviation problem is judged, a user reorganizes teaching content again, after simulation teaching is completed, the processing terminal uploads audio frequency data input in the whole process into the storage cloud, real-time feedback can be provided for the user in the simulation teaching process, and the user experience is improved. Therefore, a user can trim the simulation teaching content of the user and know the teaching quality of the user according to the coherence degree of the audio frequency information input by the microphone main body.