160results about How to "Improve aging resistance" patented technology

This invention provides a modified glass fiber, glass fiber reinforced butyl hot melt adhesive, and their preparation method. The modification method of the glass fiber includes: mixing a silane coupling agent with ethanol, stirring and hydrolyzing to obtain a silane coupling agent solution; placing the glass fiber in the silane coupling agent solution, stirring and reacting at 40-80℃ for 4-6 hours, then filtering, and curing the obtained solid product at 100-150℃ for 0.5-2 hours to obtain pre-modified glass fiber; immersing the pre-modified glass fiber in a toluene solution containing furanylsilane coupling agent, reacting under inert gas protection at 70-90℃ for 1-3 hours, and performing graft modification treatment to obtain the modified glass fiber. The use of silane coupling agent and furanylsilane coupling agent to introduce dynamic covalent bonds, synergistically modifying the glass fiber with a bilayer coupling agent, and introducing the modified glass fiber into the butyl rubber system, can effectively improve the mechanical properties and aging resistance of the butyl rubber while maintaining its original water tightness and air tightness.

The invention belongs to the technical field of graphene, and particularly relates to graphene leather capable of realizing temperature-sensitive color development and a preparation method of the graphene leather. As the graphene heating functional layer adopts the high-thixotropic silver paste, the printed circuit pattern is clear in edge, uniform in thickness and extremely high in consistency with the designed pattern; and a clear interface is formed between a silver paste circuit and leather fibers, and improper penetration is avoided. And the circuit resistance value consistency is excellent (the deviation is controlled within + / -5%), so that rapid, uniform and stable planar heating can be realized after the graphene heating layer is connected, and the local overheating hidden danger is perfectly eliminated. According to the present invention, the natural texture and the soft touch feeling of the leather are maintained while the efficient and safe heating performance with the visual color developing function is achieved.

The utility model relates to cable connection protection technical field discloses a sheath pipe structure for two cable joints, including upper casing, the outer wall fixed connection of upper casing has the connecting barrel, the inner wall rotationally connected with press column of connecting barrel, the lower surface fixed connection of press column has rotary column, the inside fixed connection of rotary column has the card post, the outer wall sliding connection of card post has the limit block, the outer wall fixed connection of limit block has lower casing, the inner wall fixed connection of connecting barrel has the limit piece, the outer wall sliding connection of rotary column has the spring. In the utility model, through the mutual cooperation between upper casing, connecting barrel, press column, rotary column, card post, limit block, limit piece, spring and lower casing, can greatly promote installation and maintenance efficiency, significantly reduce construction time and manpower cost, can simplify operation procedure simultaneously, reduce the dependence on professional tool and complex skill, reduce installation error risk.

The application belongs to the technical field of heat insulation films, and discloses a polyester-based explosion-proof heat insulation composite film and a preparation method and application thereof. The explosion-proof heat insulation composite film is a composite film with a layered structure. The layered structure comprises a sandwich heat insulation film, an anti-scratch layer and a mounting adhesive layer arranged on both sides of the sandwich heat insulation film. The sandwich heat insulation film is composed of a first polyester film, a second polyester film and a heat insulation layer sandwiched between the first polyester film and the second polyester film. In the heat insulation coating liquid, chlorinated polyolefin is used to increase the bonding adhesion and leveling dispersibility of the coating liquid on the polyester film, so that the coating type sandwich heat insulation film has excellent tear resistance and peeling resistance. The defects of the current coating type heat insulation film, such as easy blistering, heat insulation performance attenuation and reduced explosion-proof performance, are solved. The coating preparation process is simple and does not require a complex magnetron sputtering process, so that the cost of the explosion-proof heat insulation film is scaled and the production is realized.

The present application relates to a kind of low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering and its preparation method, belong to damping rubber modification technical field.The low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering described in the present application is prepared by high-vinyl polybutadiene rubber, butyl rubber, flocculation butyl nitrile rubber / oxidized carbon nanotube composite raw rubber and auxiliary mixing co-vulcanization.The vinyl content of high-vinyl polybutadiene rubber is 83-85%, Mn is 430-470, and the relative molecular mass distribution index is 2.0-2.5.The low-temperature-resistant oil-resistant damping rubber composite material for outdoor engineering described in the present application has a wider damping temperature range, excellent low-temperature damping performance, mechanical properties and oil resistance;Meanwhile, a simple and convenient preparation method is provided.

The utility model relates to the technical field of concrete square piles, and discloses an anti-compression and anti-pulling precast concrete square pile which comprises a concrete square pile body, a pile tip and an anti-pulling mechanism, the pile tip is fixedly arranged at the bottom end of the concrete square pile body, and the anti-pulling mechanism is fixedly arranged at the outer end of the concrete square pile body. An auxiliary mechanism is fixedly arranged at the inner end of the concrete square pile body; the anti-pulling mechanism comprises grooves, barb-shaped steel bars and anti-rust paint, the grooves are evenly formed in the outer end of the concrete square pile body, the barb-shaped steel bars are fixedly arranged on the side, close to the pile tip, of the outer end of the concrete square pile body, and the barb-shaped steel bars extend to the inner end of the concrete square pile body. According to the compression-resistant and pulling-resistant prefabricated concrete square pile, by arranging the pulling-resistant mechanism, the pulling-resistant performance of the concrete square pile is conveniently improved, the buoyancy of underground water is conveniently resisted, the anti-seismic effect is improved, normal use of a building is guaranteed, the use requirements of people are conveniently met, and the practicability is improved.

The present application relates to the field of polyurethane elastomer material, and particularly relates to a polybutadiene silicone diol, a preparation method thereof and a thermoplastic silicone polyurethane elastomer. The polybutadiene silicone diol with the structure of formula (I) has a moderate solubility parameter, the thermoplastic silicone polyurethane elastomer prepared from the polybutadiene silicone diol has a small degree of phase separation in the molecular chain of the elastomer, the product has unexpectedly good transparency, and in addition, the elastomer has the characteristics of PDMS and CTPB, and has excellent mechanical properties, outstanding low-temperature resilience, aging resistance, surface hydrophobicity and smoothness and other properties.

The invention provides a nano-composite anti-seepage coating for goaf sealing and a preparation method and application thereof. The impermeable coating comprises the following components in percentage by mass: 10 to 30 percent of nano silica sol subjected to surface organic modification, 15 to 35 percent of styrene-butadiene latex subjected to pH buffer stabilization, 0.5 to 10 percent of functional nano material subjected to surface activation treatment, 20 to 60 percent of superfine sand and the balance of short fiber, inorganic powder filler and auxiliaries. The method comprises raw material pretreatment; step-by-step gradient blending is performed; and functions are compounded. According to the application, the nano-composite anti-seepage coating is applied to surrounding rock reinforcement, crack plugging or anti-seepage sealing engineering of a coal mine goaf. The slurry has the advantages of being high in deep infiltration capacity, excellent in surface film forming and internal compatibility and stable in performance, an internal infiltration reinforcing layer and a surface sealing layer can be formed at the same time after construction, and an integrated double-layer anti-seepage network is formed.

The utility model relates to hexagonal net weaving forming equipment technical field, concretely to a kind of polyester hexagonal net weaving forming equipment, including bearing assembly and first bearing station, the bearing assembly includes support frame, installation rod is provided on the support frame, wire wheel is rotatably connected on the installation rod, the upper portion of wire wheel is provided with first mounting table, first mounting table rotatably connects with guide wheel, the downstream of guide wheel is provided with first mounting bracket, guide porcelain ring is installed on the first mounting bracket, the downstream of guide porcelain ring is provided with sliding rod, sliding block is installed on the sliding rod, tension porcelain ring is installed on the sliding block, to solve the raw material tension instability, transmission is easy to deviate, production continuity is poor, production efficiency is low and the problem such as operation complex in the existing polyester hexagonal net production equipment, realize the efficient, high quality, automated production of polyester hexagonal net.

The application relates to the technical field of rubber materials, and discloses fluorine rubber for high-temperature oxygen sensors and a processing technology thereof. The processing technology comprises the following steps: S1: fluorinated modified methyl vinyl silicone rubber is prepared from methyl vinyl silicone rubber and 1H, 1H, 2H, 2H-perfluorodecanethiol; S2: glycerol modified silicone rubber is prepared from methyl vinyl silicone rubber and 1-thioglycerol; the glycerol modified silicone rubber is taken, mixed uniformly in a mixed solvent of tetrahydrofuran and water, urea is added, phosphoric acid is added dropwise under heating, and the mixture is kept for reaction, the solvent is removed, and the mixture is dried to obtain phosphoric acid ester modified methyl vinyl silicone rubber; S3: the fluorine rubber after being broken, the fluorinated modified methyl vinyl silicone rubber and the phosphoric acid ester modified methyl vinyl silicone rubber are added into an open mill and mixed uniformly, a composite filler and magnesium oxide are added, mixing is carried out, a vulcanizing agent and a crosslinking aid are added, mixing is carried out uniformly, and vulcanization is carried out to obtain the fluorine rubber for high-temperature oxygen sensors.

The invention discloses a high-strength ultraviolet / moisture dual-curing PUR (Polyurethane) hot melt adhesive as well as a preparation method and a use method thereof. The adhesive is prepared from the following raw materials in parts by weight: 60 to 75 parts of isocyanate-terminated polyurethane prepolymer, 10 to 20 parts of polyurethane acrylate, 10 to 30 parts of reactive diluent, 1 to 5 parts of photoinitiator, 0.1 to 0.5 part of filler, 0.5 to 2 parts of silane coupling agent and 5 to 20 parts of tackifying resin. Wherein the isocyanate-terminated polyurethane prepolymer is obtained through a reaction of dihydric alcohol and isocyanate, the polyurethane acrylate is obtained through a reaction of the isocyanate-terminated polyurethane prepolymer and an acrylate monomer, and the adhesive disclosed by the invention has the dual advantages of rapid positioning in ultraviolet curing and high strength and durability in moisture curing; the adhesive has the advantages of high adhesive strength, good process adaptability, ultrahigh bonding strength, excellent heat resistance and aging resistance, and is especially suitable for assembly line rapid bonding and assembly of precise parts such as electronic components and optical elements.

The invention discloses an anti-aging and anti-electromagnetic shielding cable and a preparation method thereof, and belongs to the field of high voltage and the technical field of materials, the anti-aging and anti-electromagnetic shielding cable structurally contains a polyurethane-polyethylene copolymer and a flame-retardant and anti-electromagnetic sheet composite carrier, contains a polyurethane chain segment which is connected with a polyethylene main chain through a covalent bond, has no interface separation risk, and has good anti-aging and anti-electromagnetic shielding effects. Polyethylene is resistant to acid, alkali and salt mist, a carbamate group in a polyurethane chain segment can capture free radicals generated by photooxidation and thermal oxidation of polyethylene, aging is delayed from the molecular level, and the flame-retardant anti-electromagnetic sheet composite carrier endows the cable with good aging resistance and anti-electromagnetic shielding characteristics; the lamellar structure of the sheet-shaped carrier can block heat transfer and combustible volatilization, and the lamellar structure and the sheet-shaped carrier synergistically improve the flame-retardant efficiency; the introduction of the flaky composite carrier not only endows functional characteristics, but also can be used as a rigid reinforcement phase, so that the wear resistance and the extrusion resistance of the cable are improved, and the loss of the cable in the dragging and construction processes is reduced.

The invention relates to a high-hardness polyurethane adhesive as well as a preparation process and application thereof, and belongs to the technical field of polyurethane materials. The high-hardness polyurethane adhesive comprises a component A and a component B. The component A comprises the following raw materials in parts by weight: 30-50 parts of polyether polyol, 10-20 parts of a cross-linking agent, 5-10 parts of a composite filler, 0.5-1 part of a catalyst and 0.5-1 part of an antioxidant; and the component B is polyisocyanate. The adhesive prepared by the invention has high hardness and good toughness.

The application provides a two-component polyurethane pouring sealant and a preparation method and application thereof. The two-component pouring sealant comprises an A component and a B component. The A component comprises propylene oxide modified lignin polyol and erythritol modified polyether polyol. The B component comprises cashew phenol based polyurethane prepolymer. The propylene oxide modified lignin polyol, the erythritol modified polyether polyol and the cashew phenol based polyurethane prepolymer have a synergistic effect, which can significantly improve the shear strength of the pouring sealant at high temperature, and the pouring sealant has good low-temperature bonding performance, aging resistance and impact resistance. Specifically, the shear strength at 60 DEG C is greater than 13 MPa, the shear strength remains above 12.5 MPa after aging in a double 85 environment, the attenuation rate is less than 7% compared with the shear strength at room temperature, the shear strength can remain above 13 MPa after high-low temperature impact test, the attenuation rate is less than 3%, and the pouring sealant meets the pouring requirements of power batteries in the field of new energy batteries.

The application discloses a kind of media-resistant and anti-aging multilayer fuel pipe, including sequentially arranged from inside to outside inner layer, barrier layer, adhesive layer, braided layer and outer layer, inner layer is F-TPV fluorine-containing thermoplastic elastomer layer, barrier layer is FKM fluororubber layer, adhesive layer is ECO / CO fluorine-containing chloro ether rubber layer, braided layer is aramid reinforced layer, outer layer is AEM rubber layer, the thickness of outer layer is 1.2±0.2mm, for the pipe blank formed by inner layer, barrier layer, adhesive layer, braided layer, the thickness of outer layer is used to compensate to meet the thickness requirement of multilayer fuel pipe wall thickness 3.5mm.The application also discloses a kind of media-resistant and anti-aging multilayer fuel pipe of the preparation method as described above.Compared with prior art, solve the problem that the interlayer bonding force of existing multilayer fuel pipe is insufficient and the media-resistant, anti-aging performance is insufficient.

The application discloses a drainage bag with an antibacterial functional layer and a preparation process thereof, and relates to the technical field of medical materials, and comprises the following steps: adding modified montmorillonite into N, N'-dimethylacetamide, uniformly mixing through ultrasonic, adding a polyurethane film, ultrasonic immersion for 60-120 min, drying, and obtaining a drainage bag substrate; adding polylactic acid into N, N-dimethylformamide, uniformly stirring and mixing, adding modified nano zinc oxide, uniformly mixing through ultrasonic, and then performing electrospinning to obtain an antibacterial coating fiber film; placing the antibacterial coating fiber film on the inner side surface of the drainage bag substrate, high-frequency heat sealing, assembling, and obtaining the drainage bag.

The raw material compositions for preparing acrylic optical coatings and for preparing acrylic optical lenses both contain sulfur-containing aromatic acrylate compounds as shown in Formula A. The optical materials prepared from these raw material compositions, with precisely controlled refractive indices of 1.53–1.60, significantly improve the material's resistance to yellowing, optical durability, and impact resistance, meeting the application requirements of high-end optical materials. Wherein, R1 = CH2 = CH-COO, R2 = CH3, n = 2 or 3, and m = 0, 1, or 2.

The invention discloses a UV curing lamp based on multispectral partition regulation and a curing method of the UV curing lamp, and aims to solve the problems of insufficient triggering of a photoinitiator and energy waste caused by single wavelength or micro-mixing of an existing LED lamp. A light-emitting unit containing LED lamp beads with various different wavelengths is designed, a plurality of subareas are divided according to the wavelengths, independent dimming power sources are configured, and required spectrums and energy are matched and aggregated by adjusting the power of the lamp beads in the subareas, so that the method has the advantages that invalid wavelength energy waste is reduced, and energy is saved; the polymerization efficiency and the polymerization percentage are improved; under the same curing requirement, the use of the photoinitiator is reduced, and the cost is reduced; the aging resistance of the material is improved; the adaptability is high, and the requirements of different curing material systems can be flexibly met.

The invention relates to the technical field of cables, and provides an anti-aging cable and a preparation method thereof. The aging-resistant cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, the sheath layer comprises the following raw materials in parts by weight: 40-50 parts of high-density polyethylene A, 35-45 parts of high-density polyethylene B, 20-25 parts of high-density polyethylene C, 15-20 parts of filler and 2-3 parts of auxiliaries, and the types of additives of the high-density polyethylene A, the high-density polyethylene B and the high-density polyethylene C are different. According to the technical scheme, the problem of insufficient aging resistance of the cable in the prior art is solved.

The invention relates to the technical field of insulated cables, in particular to a parallel cluster type overhead XLPE insulated cable and a preparation method thereof.The parallel cluster type overhead XLPE insulated cable comprises a cable core and an insulating layer, and the insulating layer is made of an XLPE insulating material; the XLPE insulating material is prepared from the following raw materials in parts by weight: 90 to 130 parts of polyethylene composite resin, 9 to 13 parts of end-side double-hydrogen-containing silicone oil, 3 to 7 parts of polyvinyl silicone oil, 3 to 6 parts of compatilizer, 0.01 to 0.05 part of platinum catalyst, 4 to 7 parts of vinyl silane coupling agent, 8 to 13 parts of peroxide initiator, 1 to 5 parts of antioxidant, 7 to 12 parts of catalyst and 0.5 to 3 parts of water absorbent. The anti-aging cable has the advantage of improving the anti-aging performance of the insulating layer of the cable.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.

The application provides a camera waterproof structure and a camera module for a smart interactive device. The camera waterproof structure comprises a shell, a glass and a thermoplastic polyurethane transition part. The shell is a plastic shell. The thermoplastic polyurethane transition part is arranged around the circumference of the glass, and the thermoplastic polyurethane transition part and the glass are integrally injection molded. The glass is connected to the side surface of the shell through the thermoplastic polyurethane transition part, and the glass is exposed to the shell, and the thermoplastic polyurethane transition part and the shell are integrally injection molded. The camera waterproof structure has a long service life and good waterproof stability.

This invention relates to an EPDM-based crosslinked rubber material and its preparation method. The rubber material is obtained by vulcanizing raw rubber composed of EPDM rubber, maleic anhydride-grafted polyethylene, a peroxide vulcanizing agent, ethylene glycol dimethacrylate, p-benzoquinone dioxime, lead metal oxide, paraffin oil, a silane coupling agent, and an antioxidant. The EPDM-based crosslinked rubber material obtained by this invention has a double crosslinked structure. The formulation system endows EPDM rubber with excellent physical and mechanical properties, electrical insulation properties, and aging resistance, while also possessing good injection molding performance. This material solves the problems of high prices and long procurement cycles associated with imported finished products, providing an efficient and economical solution for the production of cable accessories.

The application relates to an electrostatic powder spraying process and relates to the field of surface coating processes. The electrostatic powder spraying process comprises the steps of aluminum material pretreatment, aluminum material surface treatment, aluminum material suspension, electrostatic spraying, solidification and unloading detection, and raw material powder comprises thermosetting epoxy resin, polyurethane resin, a curing agent, a dispersing agent, pigments, graphene oxide and precipitated barium sulfate. The application has the effect of improving the adhesion of the powder coating and the aluminum material.

The present application relates to the technical field of high polymer composite material, and especially to a co-extrusion fabric, a preparation method and application thereof, and is especially suitable for the field of steel-plastic composite floor which is strict in size stability and mechanical property requirement, such as building decoration, industrial floor, outdoor paving, etc., the co-extrusion fabric comprises the following raw material components in parts by weight: polyethylene: 40-70 parts; elastomer: 20-50 parts; compatibilizer: 3-10 parts; inorganic mineral: 5-10 parts; antioxidant: 0.1-1 part; lubricant: 0.5-1 part; a low-shrinkage, anti-warping polyethylene composite zinc-aluminum-magnesium alloy steel-plastic floor co-extrusion fabric is provided, by optimizing the raw material ratio, selecting special compatibilizer and inorganic mineral filler, the efficient compatibility of polyethylene, elastomer and inorganic filler is realized, the polyethylene crystalline morphology is controlled, the material shrinkage is greatly reduced, the hidden danger of warping deformation is eliminated, and the mechanical strength, toughness and weather resistance of the material are improved.

The utility model relates to cable technical field, concretely relates to a waterproof rubber cable, including setting in the cable core and the first waterproof grease, encapsulation layer, inner sheath, armoring layer and outer sheath that cover in the conductor outside in cable center, the cable core is twisted and is made of a plurality of conductors, and the interstice of a plurality of the conductor insides is filled with second waterproof grease, the first waterproof grease coats in the cable core outside, the encapsulation layer adopts the mode of around package or longitudinal package and is wound in the first waterproof grease outside, the inner sheath is extruded and is packed outside the encapsulation layer, the armoring layer adopts the mode of around package or longitudinal package and is wound in the inner sheath outside, the outer sheath is extruded and is packed outside the inner sheath. The waterproof rubber cable through " layering waterproof and structure reinforcement " combination, has realized high waterproof, high mechanical strength, high environmental adaptability comprehensive technical effect, has given consideration to electrical performance stability and use reliability, is suitable for the industry and outdoor scene of strict waterproof, protection requirement.

The invention provides anti-aging self-adhesive high-temperature vulcanized silicone rubber and a preparation method thereof. The aging-resistant self-adhesive high-temperature vulcanized silicone rubber is prepared from the following components in parts by mass: 90 to 100 parts of raw methyl vinyl silicone rubber, 40 to 50 parts of fumed silica, 10 to 20 parts of a borosiloxane structure self-adhesive agent, 4 to 10 parts of cerium oxide paste, 1 to 3 parts of a heat-resistant agent, 0.1 to 0.3 part of zinc stearate, 4 to 6 parts of hydroxyl silicone oil and 2 to 3 parts of a peroxide paste catalyst. Gas-phase silicone rubber and boric acid are combined to avoid combination of lone pair electrons of an oxygen element in a hydroxyl group and a 2p empty orbit of a B element in a synthesis process and enhance self-adhesion and mechanical properties, boron and benzene in a heat-resistant agent are introduced into a main chain, boron and silicon form a Si-O-B bond, the energy of the O-B bond can reach 537.6 J / mol, the energy of the Si-O bond can reach 422.5 J / mol, higher energy is needed for bond energy damage, and the service life of the heat-resistant agent is prolonged. And at high temperature, degradation caused by back biting of oxygen elements in hydroxyl can be avoided, side group oxidation is prevented through mutual cooperation of benzene and cerium oxide, and the aging resistance and high-temperature resistance of the silicone rubber are remarkably improved.

This invention belongs to the field of photovoltaic module technology, specifically relating to a method for preparing a lightweight photovoltaic module and its application. The preparation method includes the following steps: S1, sequentially laying a front encapsulation plate, a first encapsulating film, a solar cell, a second encapsulating film, and a rear encapsulation plate to obtain a laminate; S2, performing a lamination process on the laminate to obtain the lightweight photovoltaic module; the lamination process includes sequentially placing the laminate in the first and second chambers of a laminator for lamination; the lamination temperature T1 of the first chamber is lower than the lamination temperature T2 of the second chamber, and satisfies: 30℃≤T2-T1≤50℃. The lightweight photovoltaic module provided by this invention has high initial power, good weather resistance, aging resistance, and bending resistance, and has excellent application prospects in photovoltaic power generation equipment.

This utility model belongs to the field of PVC power pipe technology and discloses an aging-resistant PVC power pipe, including a multi-layer composite pipe body. The multi-layer composite pipe body comprises, from the inside out, a PVC base layer, a weather-resistant modified layer, and an outer protective layer. A connecting sleeve is installed at one end of the multi-layer composite pipe body. An installation ring is installed on the periphery of the end of the multi-layer composite pipe body near the connecting sleeve. A pair of installation blocks are installed around the periphery of the installation ring. One side of each installation block has a through groove. An installation ring is installed on the periphery of the end of the multi-layer composite pipe body away from the connecting sleeve. A pair of installation blocks are installed on both sides of the installation ring. One side of each installation block has a through groove. The device also includes an arc-shaped baffle and a locking mechanism. This device has a simple and reasonable structure, a novel design, and is easy to operate. It has high practicality and is easy to widely promote and use.