7102 results about "Impact resistance" patented technology

The utility model discloses a compact connector, which comprises a shell and a machine cover arranged on the upper side of the shell, the shell is provided with a placing part used for accommodating a sensor, two rows of terminal elastic sheets are fixedly connected in the placing part through in-mold molding, and the terminal elastic sheets are arranged in a staggered manner to divide the placing part into a plurality of cavities. The lower surface of the machine cover is fixedly connected with a plurality of positioning columns used for clamping the sensor in a staggered mode. When the machine cover and the shell are assembled, the positioning columns are exactly inserted into the cavity. Slots matched with the sensor are formed in the shell with an upward opening, and the slots are respectively formed in the opposite sides of the shell. According to the connector design, the cavities are divided through the staggered terminal elastic pieces, space utilization is optimized, the structure is compact, the machine cover and the shell are rapidly and stably connected through the accurately matched positioning columns, the assembly efficiency and the stability between components are improved, the terminal elastic pieces are fixed to the shell through the in-mold forming technology, the impact resistance and vibration resistance are enhanced, and the service life of the connector is prolonged. The equipment service life is effectively prolonged. And the space efficiency, the assembly convenience and the use durability are all considered.

The invention relates to the technical field of polyurethane films, in particular to a long-acting, stable, flexible, impact-resistant and resistance-reducing protective film and a preparation process thereof. According to the invention, the raw materials such as polyethylene glycol, a modified fluorosilicone monomer, isophorone diisocyanate, hydroxyethyl acrylate, an acrylic antifouling monomer, dodecafluoroheptyl methacrylate and the like are added to prepare the anti-drag coating. Mixing a polyurethane thermoplastic elastomer, aminopropyl polydimethylsiloxane, an antioxidant and an ultraviolet light absorber, and carrying out melt extrusion and blow molding to form a film, so as to obtain a flexible impact-resistant base film; and uniformly coating the surface of the flexible anti-impact base film with the anti-drag coating, and carrying out ultraviolet curing to obtain a finished product. The finished product prepared by the invention has good impact resistance, and can effectively reduce frictional resistance, so that the finished product has wide application prospects in the technical field of polyurethane films.

The invention discloses shrinkage-free aluminoferrite cement-based ultra-high performance concrete and a preparation method thereof, and belongs to the technical field of novel wall materials, and the shrinkage-free aluminoferrite cement-based ultra-high performance concrete comprises the following components: an activated cementing material, mineralized aggregate, an additive, reinforced fibers and mixing water. Due to the slow release effect of the methyl cellulose coating on the composite expanding agent, precise compensation of self-constriction is achieved, and contraction deformation in the curing and using process is effectively inhibited. Due to the unique mineral composition of the aluminoferrite cement, the early strength of the concrete is sharply improved, and the production cycle of prefabricated parts is greatly shortened. The steel fibers subjected to sand blasting and pre-wrapping modification can effectively bridge microcracks in the concrete and limit crack propagation; the polycarboxylate superplasticizer disperses the modified carbon nanofibers, crack initiation is inhibited from the microscopic level, and mechanical properties such as fracture resistance and impact resistance of the joint part and the prefabricated part are remarkably improved through cooperation of the polycarboxylate superplasticizer and the modified carbon nanofibers.

The invention discloses a degradable bamboo fiber express packaging bag and a preparation method thereof, and belongs to the technical field of express packaging. The packaging bag is prepared from, by mass, 32-42 parts of pretreated bamboo fibers, 22-28 parts of poly (butylene succinate), 9-14 parts of modified nano calcium carbonate, 12-16 parts of polycaprolactone, 6-11 parts of acetylated chitosan and the like, and the key raw materials are all treated through an exclusive pretreatment or modification process. The preparation method comprises the steps of raw material plasma activation, segmented high-speed mixing, vacuum drying, precise-parameter twin-screw extrusion granulation, secondary drying, precise film blowing, high-precision heat-sealing bag making and the like, and the technological parameters of all the steps are clear. The product disclosed by the invention can be efficiently degraded in a natural environment, has excellent tensile resistance, puncture resistance and impact resistance, is stable and controllable in processing process, and is adaptive to actual requirements of express packaging and industrial batch production.

The invention relates to the field of detection, in particular to a glass fiber asphalt shingle quality detection device. Traditional detection equipment has significant limitations which are mainly embodied in that only impact at a single position can be simulated or randomness is lacked, and diversified impact conditions possibly encountered by asphalt shingles in actual use cannot be accurately reflected. The glass fiber asphalt shingle quality detection device comprises a shell, and a frame body and the like are arranged in the shell; the frame body is of an open structure, and a placing frame is arranged in the frame body in a sliding mode. According to the invention, the two electric push rods drive the lifting frame, the two push blocks and the two transverse shafts to move synchronously, so that the knocking block can carry out repeated impact test on the asphalt shingle body, and the continuity and consistency of the test are ensured; not only is the efficiency of the knocking test improved, but also the flexibility of force adjustment in the detection process is improved, and the impact resistance requirements of different asphalt shingle bodies can be met; through multiple impact tests, the quality evaluation of the asphalt shingle can be ensured to be more comprehensive and accurate.

The invention discloses a modified organic silicon resin, a high-temperature-resistant coating and a preparation method thereof, the modified organic silicon resin is prepared by hydrolyzing at least two different siloxane monomers and then carrying out condensation reaction on the hydrolyzed siloxane monomers and at least one boric acid monomer, and the main chain of the organic silicon resin is of a heteroatom doped structure formed by a Si-O bond, a B-O bond and a B-O-Si bond; at 200-250 DEG C, the modified organic-inorganic high-temperature-resistant composite material is subjected to a self-crosslinking reaction. The high-temperature-resistant coating overcomes the defect that the high-temperature-resistant coating in the prior art cannot meet the high-temperature test, and avoids the defects that organic and inorganic high-temperature-resistant coatings crack, the impact resistance and hardness are not matched, the water resistance is poor, and the wear resistance is poor.

The invention discloses a laminated plate impact event three-dimensional strain field inversion method based on binocular vision, and the method comprises the steps: laying dynamic tracking mark points on the surface of an impacted carbon fiber laminated plate, synchronously collecting the image data of the whole impact process through a high-speed binocular camera, and generating a binocular vision image sequence with impact time sequence information; generating three-dimensional displacement field data of the impact area of the carbon fiber laminated plate based on the binocular vision image sequence; calling the anisotropic constitutive model of the carbon fiber laminated plate to generate a preliminary three-dimensional strain field inversion result; and performing coupling operation on the preliminary three-dimensional strain field inversion result, the impact load parameter and the laminated plate material characteristic parameter to generate a final carbon fiber laminated plate three-dimensional strain field inversion result consistent with the dynamic response of the impact event. According to the embodiment of the invention, accurate full-field representation of the dynamic strain of the impact event can be realized, and reliable data support is provided for impact resistance evaluation and structure optimization of the laminated plate.

The invention belongs to the technical field of coatings, and discloses an anti-sinking water-based acrylic resin coating and a preparation method thereof.The anti-sinking water-based acrylic resin coating is prepared from, by weight, 110-130 parts of modified water-based acrylic resin, 10-25 parts of modified cellulose nanocrystals, 3-5 parts of a composite additive, 4-6 parts of a dispersing agent, 0.5-2 parts of a defoaming agent, 0.5-2 parts of a flatting agent and 10-20 parts of water; the acrylic resin is modified by using the organic silicon oligomer and the epoxy resin, the film hardness is high, the adhesive force is strong, and the film hardness, the impact resistance, the ultraviolet aging resistance and the flame retardant property of the material are improved by adding the modified cellulose nanocrystals and the composite additive.

The invention relates to the technical field of sound absorption, noise reduction and impact resistance, in particular to a multifunctional tunable bionic sound absorption and collision prevention integrated superstructure and a preparation method thereof.The multifunctional tunable bionic sound absorption and collision prevention integrated superstructure comprises a shell, an upper sound absorption layer, a lower sound absorption layer and a middle collision prevention layer, the sound absorption layer is provided with a plurality of curved-surface microwell plates which are connected end to end to form a cavity, and the embedded pipe is combined with the cavity to form a Helmholtz resonator; the anti-collision layer is composed of an energy absorption unit array. The preparation method comprises the steps that a three-dimensional model is firstly built, then a laser scanning mode and parameter printing are set, then heat treatment is conducted, then cutting and layer taking are conducted, and finally the superstructure is manufactured through glue joint. The sound absorption and noise reduction functions and the energy absorption and anti-collision functions are integrated, the sound absorption performance is improved through the bionic structure, energy is efficiently absorbed through the middle layer dot matrix, adjustable performance and lightweight design are achieved through parameterized design, the additive manufacturing process is simple, convenient and efficient, and large-scale production and application are facilitated.

The invention discloses a production process of tempered laminated glass, which belongs to the technical field of tempered glass, and comprises the following steps: strictly screening raw sheets, carrying out three-zone gradient tempering, namely, mutually combining 680-700 DEG C temperature zone temperature control and 8-12kPa gradient wind pressure quenching, and precisely compounding by using a PVB interlayer to obtain the tempered laminated glass. 23 DEG C / 30% RH pre-balancing, 0.5 mm vacuum positioning and 120-140 DEG C rolling initial pressing are combined, and then high-pressure kettle staged curing, namely, the process of heat preservation for 120 minutes at 1.2 MPa / 135 DEG C and the process of gradient cooling at the temperature smaller than or equal to 15 DEG C / h are combined, so that the finally prepared tempered glass product has high optical performance, namely distortion smaller than or equal to 0.1 mm / mm, high impact resistance, namely no penetration in 1m steel ball falling and excellent weather resistance; degumming is avoided in the environment of 85 DEG C / 85% RH / 500 h, and accurate control over the whole process from materials to finished products is achieved. Therefore, the production process of the tempered laminated glass solves the technical problem of how to improve the production efficiency of the tempered laminated glass.

The invention discloses a dam underwater seepage point detecting and plugging integrated system and method, and relates to the field of dam safety maintenance. The dam underwater seepage point detection and plugging integrated system comprises a suspension frame and further comprises a sleeve fixedly connected to the suspension frame; the piston disc is connected in the sleeve in a sliding manner; one end of the spring is fixedly connected with the inner wall of the sleeve, and the other end of the spring is fixedly connected with the piston disc; through the synergistic effect of the sealing air bag, the spring piston disc and the conducting ring warning indicator, efficient and reliable plugging is achieved, the sealing air bag expands to fill gaps, water seepage is isolated, equipment is fixed, and the impact resistance is enhanced through the L-shaped design; the spring is matched with the piston disc, so that the gap is uniformly filled with polyurethane, the piston disc moves to supply air to the air bag, and the whole-course sealing stability is ensured; the conducting ring and the warning indicator feed back the plugging state in real time, diving operation of personnel is avoided, and efficiency and safety are improved.

The invention discloses an implantable absorbable PLA composite material and a preparation method thereof, and relates to the technical field of medical materials. The implantable absorbable PLA composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of PLA, 5 to 10 parts of poly (lactic-co-glycolic acid), 8 to 12 parts of polycaprolactone, 5 to 8 parts of modified hydroxyapatite, 2 to 3 parts of a toughening agent and 0.2 to 0.6 part of an antioxidant, the toughening agent is prepared by the following steps: reacting hydroxyethyl methylacrylate with ethylenediamine to prepare a four-arm compound, reacting the four-arm compound with 1-chloro-4-isocyanatobutane to prepare an isocyanate compound, and finally reacting the isocyanate compound with polyethylene glycol. The implantable absorbable PLA composite material prepared by the invention has excellent tensile property and impact resistance, and can meet the application requirements of clinical medical treatment.

The invention discloses a high-toughness flame-retardant polyurethane cable insulation layer material and a preparation method and application thereof.According to the preparation method, firstly, a phosphorus-containing compound is grafted to polyhydric alcohol, molecular-level uniform dispersion of flame-retardant elements is achieved, and meanwhile the problems that a traditional additive type flame retardant is prone to migration and precipitation and deteriorates the mechanical property of polyurethane are solved; then polymerizing with a diisocyanate monomer and a chain extender, and then extruding and granulating with an antioxidant, a layered nano filler and a maleic anhydride grafted toughening agent through a double-screw extruder to obtain the polyurethane elastomer. The prepared polyurethane cable insulation layer material has the advantages of no halogen, environmental protection, high flexibility, excellent flame retardant property and the like. Besides, the strong polarity of the maleic anhydride grafted flexibilizer and the twin-screw extrusion process can promote the uniform dispersion of the layered nanofiller, so that not only are the flexibility and impact resistance of the material improved, but also the flame-retardant effect is further enhanced through the synergistic effect of the nanofiller, and the material has a wide application prospect in the field of wires and cables.

The invention provides a polyamide composition and application thereof. The polyamide composition comprises the following components in parts by mass: 40-99.5 parts of polyamide, 10-45 parts of a reinforcing material and 5-35 parts of a flame retardant, the flame retardant is prepared from the following components in parts by mass: 30 to 90 parts of diethyl phosphinate, 0.01 to 3 parts of ethyl phosphonate, 5 to 67 parts of dialkyl phosphinate and 0.01 to 5.5 parts of alkyl phosphinate. According to the invention, by introducing the specific flame retardant, an efficient flame retardant effect can be exerted, so that the polyamide composition has excellent flame retardant property and excellent impact resistance.

This invention belongs to the technical field of photovoltaic panel testing equipment, specifically a photovoltaic panel impact resistance testing device, including multiple testing frames. Each testing frame has an internal flipping mechanism and a displacement mechanism. A top cover is provided on the top of each testing frame, and an operating box is installed between the outer walls of the testing frames. A puck storage box is installed on the outer wall of the top cover, and a limiting component is provided on the inner wall of the testing frame. By changing the rotational speed of the longitudinal gear, the movement trajectory of the puck launcher is altered. The teeth of the second gear mesh with those of the first gear, and their circumferences differ significantly. Therefore, the rotational speeds of the first and second gears are different. When the first gear rotates one revolution, the second gear has already rotated many revolutions. When the puck launcher is controlled to move, the lateral and longitudinal movement speeds differ, and its movement trajectory changes accordingly, thus increasing the randomness of the puck launch position.

The invention discloses a flame-retardant impact-resistant composite acrylic plate and a preparation method thereof, belongs to the technical field of acrylic plate processing, and aims to solve the technical problem that the flame retardance and impact resistance of an acrylic plate in the prior art need to be further improved. The acrylic plate comprises the following raw materials in parts by weight: 80-100 parts of flame-retardant modified PMMA, 40-60 parts of polycarbonate, 25-35 parts of a modified toughening agent and 10-15 parts of an auxiliary additive, and is prepared by the following steps: putting the flame-retardant modified PMMA, the polycarbonate, the modified toughening agent and the auxiliary additive into a twin-screw extruder, carrying out melt extrusion, pouring into a mold, and carrying out post-treatment to obtain the acrylic plate. The flame retardant property and the impact resistance of the acrylic plate are improved, and the mechanical property of the acrylic plate is also improved.

The invention provides a force and acceleration composite sensor with a calibration function and a working method, and belongs to the field of composite sensors, the force and acceleration composite sensor with the calibration function comprises a test base, the test base is provided with a test through hole, and the test through hole is provided with a mounting hole; a pressure sensitive diaphragm II and a pressure monitoring core body are mounted in the mounting hole; an impact head limiting and fixing upper base is mounted on the test base, an impact head is mounted in a sliding through hole of the impact head limiting and fixing upper base, a first pressure sensitive diaphragm is arranged at the lower end of the impact head, and an acceleration monitoring core body is mounted at the lower end of the first pressure sensitive diaphragm; a third pressure sensitive diaphragm is installed at the bottom of the test through hole, a calibration base is arranged at the lower end of the test base, a calibration groove is formed in the calibration base, and a standard pressure sensor and a tested pressure sensor can be installed on the side wall of the calibration groove. The device has the beneficial effects that the device has multiple advantages of synchronous monitoring of force and acceleration, flexible impact resistance and integrated calibration.

A high-strength PA6 composite material and a preparation method therefor, the PA6 composite material comprising, in parts by mass, 80-95 parts of caprolactam, 1-3 parts of benzoic acid and 10-30 parts of a modification additive. The benzoic acid is used for improving the tensile strength of the composite material, and the modification additive is used for enhancing the impact resistance of the composite material. Terephthalic acid and m-xylylenediamine undergo a reaction to generate m-xylylenediamine terephthalate, which is then subjected to a polycondensation reaction with caprolactam, so as to introduce same into the backbone of a PA6 molecule and modify the PA6 resin. The modified PA6 resin has remarkably improved tensile strength and impact resistance, so that the application range of the PA6 composite material can be greatly expanded.

The invention relates to the technical field of powder metallurgy, and particularly discloses an ultra-coarse grain WC-Co hard alloy and a preparation method thereof.The preparation method comprises the following steps that S1, the following raw materials including, by weight, 4.6-9.2 parts of cobalt powder, 96-102 parts of coarse grain tungsten carbide powder, 3.6-5.2 parts of functional gel, 3.4-4.6 parts of modified penetration enhancer, 2.2-2.8 parts of binder and 36-62 parts of organic solvent are prepared; step S2, preparation of a mixture; step S3, carrying out granulation treatment; step S4, compacting; step S5, pressurizing and sintering; the functional gel and the modified penetration enhancer are added, the functional gel contains yttrium oxide, polytannic acid, ultrafine tungsten carbide, tantalum carbide, chromium carbide, silica gel and other components, and the functional gel not only has excellent physical properties, but also can be cross-linked with the modified penetration enhancer to form a more compact silicon dioxide network structure; and the hardness, toughness, impact resistance and wear resistance of the alloy are improved.

The invention provides a waterproof cable intermediate joint structure, and relates to the technical field of cable intermediate joints, the waterproof cable intermediate joint structure comprises stress cones, the stress cones are installed at cable joints through compression devices, the parts, extending out of the stress cones, of the two cable joints are connected through a connecting sleeve, and the connecting sleeve and the two stress cones are sleeved with a protective copper shell. Epoxy resin is filled between the protection copper shell and the stress cone, one end of the protection copper shell contacted with the cable sheath is provided with a waterproof layer, and an intelligent monitoring system is integrated in the intermediate joint. The high waterproof performance is achieved through cooperation of epoxy resin filling and the waterproof layer, moisture is effectively blocked to prevent the interior of the connector from being damped and broken down, the power transmission safety is improved, the copper shell is protected to provide mechanical support, the external force impact resistance of the connector is enhanced, and the connector is suitable for the complex environment; potential faults can be warned in advance, the manual inspection cost is reduced, and the operation and maintenance efficiency is improved.

The invention belongs to the technical field of building materials, and particularly relates to a light prefabricated concrete wallboard and a production method thereof. The light prefabricated concrete wallboard is prepared by coating the main component fly ash of the concrete wallboard and cooperating with the combined action of the carbon nanotubes and the basalt fibers, so that the compressive strength of the material is effectively improved, the impact resistance is improved, and meanwhile, good combustion performance is obtained.

The invention discloses a paper product compression resistance detection device, and belongs to the technical field of carton testing. An adjustable positioning and supporting mechanism is mounted at the upper end of the base table and comprises a linear sliding table and an adjustable single-angle positioning assembly; a block type static pressure testing mechanism is arranged between the stand columns. The base station is also provided with a dynamic pressure testing mechanism; by means of the mode, downward pressure is applied to the carton through the block type static pressure testing mechanism so as to test the overall static compression resistance of the carton, and the carton is partially exposed to the outer side of the moving end of the linear sliding table through the adjusting type single-angle positioning assembly; the dynamic pressure testing mechanism is arranged on the carton and is matched with the block type static pressure testing mechanism to apply pressure to the exposed part of the carton so as to test the local static pressure resistance of the carton, and meanwhile, the impact resistance of the carton can be tested through the dynamic pressure testing mechanism so as to test the comprehensive capacity of the carton in the transportation process.

The utility model discloses an electro-hydraulic reversing valve which comprises a pilot electromagnetic valve and a main valve. The pilot electromagnetic valve is detachably connected with the main valve; after the pilot electromagnetic valve is connected with the main valve, an oil cavity in the pilot electromagnetic valve is communicated with an oil way in the main valve; a first pilot control oil way, a second pilot control oil way, an outer oil supply way, an inner oil supply way, an outer oil discharge way and an inner oil discharge way in the main valve are all casting oil ways, and the number of each oil port is two. The oil paths in the main valve are all formed through casting instead of auxiliary holes, so that the impact resistance of the oil paths can be improved, oil leakage at conical plugs of the auxiliary holes is avoided, the pressure loss of hydraulic oil flowing in the oil paths can be reduced, and the through-flow capacity of the hydraulic oil in the oil paths is improved.

The invention provides a toughened curing-controllable prepreg and a preparation method thereof, and belongs to the technical field of high-performance composite materials. Comprising the following components in parts by mass: 100 parts of epoxy resin, 100 parts of a thermoplastic resin toughening agent, 100 parts of an inorganic nanoparticle toughening agent, 100 parts of a latent curing agent, 100 parts of an organic urea accelerant, 100 parts of an imidazole accelerant and 100 parts of a reactive diluent, correspondingly, 1-5 parts by mass of a thermoplastic resin flexibilizer, 0-3 parts by mass of an inorganic nanoparticle flexibilizer, 4-8 parts by mass of a latent curing agent, 1-4 parts by mass of an organic urea accelerator, 0.1-0.5 part by mass of an imidazole accelerator and 5-20 parts by mass of an active diluent are added. The prepreg provided by the invention not only is endowed with fast curing and controllable curing time, but also is endowed with relatively long room-temperature storage period, high toughness and good impact resistance, and is especially suitable for the fields of low-altitude aircrafts, automobiles, ships and the like.

The invention provides a PMMA (Polymethyl Methacrylate)-ASA (Acrylonitrile Styrene Acrylate) composite material as well as a preparation method and application thereof. The PMMA-ASA composite material is prepared from the following components in parts by mass: 33 to 70 parts of PMMA resin, 20 to 45 parts of ASA rubber powder, 5 to 30 parts of styrene-N-phenylmaleimide-MMA copolymer and 0.1 to 2 parts of coloring agent. The ASA rubber powder comprises a combination of small-particle-size ASA rubber powder and large-particle-size ASA rubber powder, the particle size of the small-particle-size ASA rubber powder is smaller than or equal to 150 nm, and the particle size of the large-particle-size ASA rubber powder is 180-400 nm. Through the design of the ASA rubber powder with bimodal particle size distribution and the styrene-N-phenylmaleimide-MMA copolymer and the compounding of the ASA rubber powder and the styrene-N-phenylmaleimide-MMA copolymer with the PMMA resin, the PMMA-ASA composite material has the advantages of excellent heat resistance, good chromaticity, excellent toughness and impact resistance, and no appearance defect on the surface of a product.

The invention provides a special flame-retardant PC / ABS alloy material for a high-heat-resistant power battery accessory and a preparation method of the special flame-retardant PC / ABS alloy material, and relates to the technical field of high polymer materials. According to the invention, PC and ABS with specific indexes are selected to improve the strength and heat resistance of the basic resin. Three combustion improvers with different flame-retardant mechanisms and an activated 4A molecular sieve are used as auxiliary flame-retardant synergists, so that the effect of the auxiliaries is exerted to the greatest extent, the total addition amount is reduced, and the loss of material performance is reduced; the heat resistance of the material is enhanced by matching the organic polymer heat-resistant agent and the inorganic nanoparticles, and the heat deformation temperature and the vicat softening point are improved by a relatively low addition amount. Compared with a general grafting toughening agent and an MBS toughening agent, the impact-resistant toughening agent with a core-shell structure of an organic silicon system is selected, so that the low-temperature impact resistance and the weather resistance are more excellent, the synergistic effect on a flame-retardant system is good, and the material is endowed with a good appearance.

The invention discloses a sandwich structure based on chiral pressure torsion and negative poisson ratio honeycomb compounding, and relates to the technical field of mechanical metamaterials. The sandwich structure comprises an upper skin layer, a core layer and a lower skin layer, the core layer is formed by alternately compounding three-dimensional chiral compression-torsion cell elements and negative poisson ratio honeycomb cell elements which are periodically arranged, and the chiral compression-torsion cell elements form a bidirectional torsion stress network through spiral connecting rods; the negative Poisson's ratio honeycomb cell element is of a concave polyhedron structure and is nested with a butterfly-like substructure, and energy is absorbed through transverse contraction and folding deformation in a cooperative mode. The sandwich structure has a multi-stage energy dissipation mechanism: the chiral compression-torsion unit disperses impact energy through spiral deformation, the butterfly-like substructure elastically shrinks at low strain and slides and folds at high strain, and the energy absorption efficiency is enhanced through friction and plastic deformation; the structural parameters can be subjected to gradient regulation and control according to the impact strength, the lightweight rate and the deformation mode, and high design flexibility and working condition adaptability are achieved.

The utility model discloses a quick connecting and clamping device which comprises a core rod, a pulling and screwing assembly arranged on the core rod and an elastic assembly connected to the core rod in a sleeved mode, and the pulling and screwing assembly comprises a cam handle rotationally connected to one end of the core rod and a spring piece movably arranged at the other end of the core rod. The cam handle is connected with the end of the spring piece, a first flat position is arranged at the end, close to the spring piece, of the core rod, an installation groove is formed between the first flat position and the core rod, a locking block is arranged on the core rod, a first kidney-shaped hole is formed in the locking block, and a second kidney-shaped hole is formed in the first kidney-shaped hole. The locking block penetrates through the first flat position through the first kidney-shaped hole and is connected into the mounting groove, and when the locking block rotates till the length direction of the first kidney-shaped hole is inconsistent with the length direction of the first flat position, the first flat position limits movement of the locking block. The quick connecting and clamping device has the advantages of being high in vibration resistance and impact resistance, reliable in connection, capable of being quickly disassembled and assembled, capable of being repeatedly disassembled and assembled for use, convenient to disassemble and assemble, easy to machine and manufacture and the like.

The invention relates to the technical field of protective glue, in particular to extreme high and low temperature impact resistant UV (ultraviolet) photocuring electronic protective glue which is prepared from the following raw materials in parts by weight: 30-50 parts of synergistically modified epoxy-urethane acrylate oligomer, 20-35 parts of composite active monomer, 1.5-5 parts of composite photoinitiator and 10-20 parts of core-shell structure inorganic composite filler, 0.6 to 2.2 parts of a silane coupling agent, 0.12 to 1.1 parts of an antioxidant and 0.11 to 1 part of a leveling agent; the preparation method of the synergistically modified epoxy-urethane acrylate oligomer comprises the following steps: reacting resin acid modified epoxy resin with phosphoric acid di (hydroxyethyl acrylate) ester at 80-90 DEG C, and introducing a phosphate group to obtain a phosphate modified epoxy acrylate intermediate; the protection glue unifies rigidity, flexibility and flame retardance on the molecular level through the cooperation of the hybrid oligomer and the core-shell filler, realizes high heat conductivity, strong adhesion and extremely low internal stress, and has extreme temperature impact resistance, long-term damp-heat aging resistance and high-reliability protection performance.

The invention provides an ultra-high molecular weight polyethylene fiber resin composite material interface regulation composition which comprises the following components in parts by weight: 100 parts of ultra-high molecular weight polyethylene fiber, 12 parts of polyethylene, 0.6 part of a compatilizer, 0.03 part of an initiator, 2.5 parts of gallic acid, 1 part of tetraethylenepentamine and 5 parts of nano silicon dioxide. The compatilizer is used for melt grafting with polyethylene, and the initiator is used for initiating melt grafting of the compatilizer and polyethylene. The invention also provides a method for carrying out interface regulation and control by adopting the interface regulation and control composition and an ultra-high molecular weight polyethylene fiber resin composite material prepared by the method. The ultra-high molecular weight polyethylene fiber resin composite material obtained by carrying out interface regulation and control treatment on the ultra-high molecular weight polyethylene fiber resin composite material interface regulation and control composition has a good interface state, excellent mechanical properties and good impact resistance.