738 results about "Layered structure" patented technology

The invention relates to the field of super-hydrophobic materials, in particular to a basalt fiber composite material as well as a preparation method and application thereof. According to the composite fabric material provided by the invention, a multistage micro-nano rough surface of the MoS2 nanoflowers and the silver nanoparticles is constructed on the fiber substrate, so that not only is super-hydrophobic self-cleaning realized, but also the anti-icing performance is relatively high, and particularly, rapid heating is realized by combining broadband absorption of the MoS2 nanoflowers and a local surface plasma resonance effect of the silver nanoparticles; and meanwhile, the silver nanoparticles accelerate heat conduction, so that excellent ice melting capability is obtained. The high conductivity of the silver nanoparticles constructs a conductive path, and the layered structure of MoS2 triggers interface polarization, so that the electromagnetic shielding effectiveness of the X wave band is improved. The dual antibacterial mechanism of the MoS2 nanoflowers and the silver nanoparticles also realizes broad-spectrum efficient antibiosis, the preparation method is green and environment-friendly, the cost is low, and the requirements of complex scenes such as wearable electronic equipment, medical protection, polar region protection and national defense can be met.

The invention provides a composite material additive manufacturing method and device based on size error compensation, and the method comprises the steps: selecting the number, type and combination mode of materials needed by each layered structure strip according to the material performance of a prepared component and the local thermodynamic performance and mechanical performance of the component; all strips of the single layered structure are laid at the same time or in each round, so that the single layered structure is formed; each strip is made of a single type of material or is formed by laminating and compounding a plurality of single type of materials, and the self-adaptive laying method is executed according to data of various sensors in the laying process and data of a detection mechanism after laying; and the steps are repeated, and the strips are laid layer by layer according to the layer sequence of the layered structure till the component is formed. According to the method, through effective combination of additive manufacturing modes of multiple fiber composite materials, multiple materials are combined and then laid, and it is ensured that the distribution of fibers and the infiltration effect of a matrix reach the ideal state.

The invention discloses a wearable medical monitoring equipment electrode which is composed of a layered structure and comprises a transparent flexible substrate layer which is made of a biocompatible flexible polymer material and is used for providing flexible support and isolating a metal electrode from the skin; the metal grid copper transparent electrode layer is formed on the surface of the transparent flexible substrate layer through a yellow light etching micro-nano processing technology; the conductive gel layer uniformly covers the surface of the metal grid copper electrode layer; the encapsulation layer is formed by spin-coating a polymethyl methacrylate solution on the surface of the conductive gel layer and forming a transparent protection layer after curing; the gradient line width bionic honeycomb-shaped copper grid design is adopted, the light transmittance is kept, meanwhile, the collection efficiency of physiological electric signals is remarkably improved, signal transmission loss is reduced, through the polyacrylamide and nanocellulose composite gel formula and micro-channel dynamic humidity adjustment, signal stability under long-term wearing is ensured, and the application range is wide. The problem of signal distortion caused by dryness of traditional gel is solved.

A computer-implemented method and apparatus for managing physical and digital products' customization using container format are disclosed. In some embodiments, the method comprises receiving a container file with serialized objects, deserializing these objects to form a hierarchical object structure, and interacting with a database to obtain real-time configuration data. Custom attributes of the products are defined by binding attribute / value pairs to the hierarchical structure. A visualization of the customized product is generated based on these pairs, and manufacturing instructions are determined considering the attribute / value pairs and manufacturing constraints. The apparatus comprises a memory and a processor to execute instructions for deserializing the container file, retrieving configuration data, organizing objects into a hierarchical tree, negotiating product customizations, and outputting manufacturing data. This system enables efficient and accurate production of customized products by managing data, rendering graphics, and incorporating manufacturing constraints.

According to the caisson wharf and the construction method thereof, a layered structure of a steel slag-rubber particle composite lower layer and a regenerated resin-basalt fiber composite upper layer is adopted for a base, and interface bonding is enhanced in combination with a silane coupling agent; the foundation bed is assembled by precast concrete modules and is poured by nano mortar; the caisson main body is provided with a positioning plate which is inserted into the guide groove, the caisson main body is filled with multi-graded steel slag fragments, and an independent airbag cavity is pre-buried in a bottom plate; the buoyancy control system dynamically adjusts the water injection rate based on multi-sensor data; the ecological permeable pipeline network adopts a diatomite-zeolite coating; the prestressed steel strand towing system is regulated and controlled in real time through the friction damper. The caisson wharf and the construction method thereof have the remarkable advantages in the aspects of structural stability, ecological friendliness, construction efficiency, intelligence and automation, the problems existing in a traditional caisson wharf can be effectively solved, and the requirements of modern port construction are met.

The invention belongs to the technical field of metal-based composite material preparation, and particularly relates to a method for treating a high-volume-fraction particle reinforced aluminum-based surface through friction stir. In order to solve the problems of particle aggregation, uneven distribution and the like in the preparation process of a high-volume-fraction particle reinforced aluminum-based composite material in the prior art, the invention innovatively introduces a method for mixing and adding solid lubricating particles with two-dimensional layered structures and hard particles. According to the method, the interface regulation and control effect of the two-dimensional layered particles is used in cooperation with the special stirring head, uniform distribution of the hard particles in the composite layer is effectively promoted, the hole defect caused by particle aggregation is remarkably reduced, and controllable preparation of the high-volume-fraction particle reinforced aluminum matrix composite is achieved. And subsequent solid solution and aging heat treatment are combined, so that the comprehensive mechanical property and wear resistance of the material are further improved. The method is simple in process and easy to implement, and has good engineering application value.

The invention discloses a strong isolation abnormal data analysis method, system and device and a storage medium, and is applied to the field of computer security, and the method comprises the steps: obtaining the original behavior data of a strong isolation boundary through an acquisition end deployed by a bypass; analyzing the original behavior data to obtain effective behavior data; performing double layering on the effective behavior data in a multi-dimensional analysis mode to obtain structured data; performing spatial vector hybrid dimension packaging on the layered structured data to obtain standardized packaging data; and sending the standardized packaged data to a server for data exception analysis. According to the method, all behavior data passing through the strong isolation boundary can be comprehensively acquired, the problem of security threat omission caused by incomplete data monitoring in the prior art is effectively avoided, the integrity and accuracy of data monitoring are ensured, and potential security threats can be accurately identified.

The invention relates to the technical field of composite materials, in particular to a high-strength epoxy resin composite material and a preparation method thereof, and the high-strength epoxy resin composite material comprises the following raw materials in parts by weight: 50-80 parts of a base material, 10-20 parts of a curing agent, 5-10 parts of modified carbon nanotubes, 3-10 parts of a reinforcing sheet, 3-6 parts of a reinforcing material and 1-3 parts of a flame retardant. In the preparation method, the modified carbon nanotubes are in chemical bond connection with the base material through surface modification, the interface bonding force is enhanced, stress is effectively transmitted, the unique layered structure and surface modification treatment of the enhanced sheet are enhanced, the enhanced sheet is firmly combined with the resin matrix, and a three-dimensional enhanced network is formed through the synergistic effect of mechanical interlocking and stress dispersion. The vermiculite sheet layer prevents crack propagation, and the modified carbon nanotubes and the reinforcing material effectively transfer stress, so that the tensile strength and bending strength of the composite material are greatly improved, and the high-strength application requirement is met.

The invention discloses a triboelectric pressure sensor with a gradient layered structure. The triboelectric pressure sensor comprises a conductive shielding layer I (1), an insulating layer I (2), an electrode layer I (3), a friction layer, an electrode layer II (5), an insulating layer II (6) and a conductive shielding layer II (7) which are stacked in sequence, the gradient layered structure design is provided, the linear range is expanded through layered and staged response pressure, the shielding layer is integrated to suppress interference, materials and the process are optimized, and stability and manufacturability are improved.

The invention relates to an industrial park-based comprehensive energy flow direction on-line monitoring system and method, and the system comprises an energy modeling module which is used for representing instrument information, carrying out the modeling of collection labels and collection frequencies of different types of instruments, constructing nodes of different energy layered structures, carrying out the modeling of a directed flow direction relation between the nodes, and carrying out the modeling of the directed flow direction relation between the nodes; binding the logic relationship between the node and the instrument; the data acquisition module is used for performing data acquisition through an instrument, performing edge processing and encrypted transmission through communication equipment, and storing the data in a database; the energy monitoring module is used for monitoring and counting the state of the instrument and monitoring the energy flow direction of the enterprise in real time according to the directed flow direction of the node; and the statistical analysis module is used for providing energy balance analysis for different links of the enterprise energy in the conversion and use process according to the nodes, evaluating the energy consumption loss degrees of the different links, visualizing the nodes with abnormal loss and giving an alarm. Through the real-time and accurate calculation of the energy loss among the nodes at all levels, the backtracking of the nodes with abnormal loss and the timely pushing of the alarm information, the enterprise can timely discover the problems occurring in the energy supply, and can quickly find out the corresponding solution, reduce the energy consumption loss and guarantee the robustness of the energy flow network.

A flexible display device example includes a display panel including an active area, a non-active area, and a bending area and having one edge that is bent in a rear direction to have a predetermined curvature, first and second back plates disposed on a rear surface of the display panel, a metal plate disposed on a rear surface of the first back plate and an adhesive member disposed between the metal plate and the second back plate, and including a support layer, a first adhesive layer and a third adhesive layer disposed on an upper portion of the support layer, and a second adhesive layer disposed on a lower portion of the support layer, wherein the third adhesive layer may include a conductive material and may have conductivity. Thus, fixing force of a bending portion may increase, thereby preventing cracks in the bending portion that may occur during drop evaluation.

The invention relates to the technical field of comprehensive energy management, and discloses an energy storage coordinated regulation and control method and device, and the method comprises the steps: determining an operation mode of an energy storage station, and packaging the operation mode of the energy storage station as an option; on the basis of the options and the semi-Markov model, constructing a semi-Markov model integrated with the options; and constructing a layered option evaluation model based on the semi-Markov model of the fused options, and solving an optimal energy storage coordinated regulation and control scheme corresponding to the operation mode of the energy storage station in the multivariate application scene based on the layered option evaluation model. According to the method, the station operation mode is packaged in the options, the algorithm solving efficiency is improved, in addition, the parameter quantity and the calculation cost are reduced by adopting the model of the layered structure, and coordinated regulation and control of energy storage under multiple application scenes are achieved in a short time.

The invention discloses a modal fusion intelligent video abnormal behavior monitoring method, and relates to the technical field of intelligent security monitoring, and the method comprises the following steps: collecting video modal data through a video camera, collecting sound modal data through an audio sensor, and obtaining environment state modal data through an environment state sensor; denoising processing is carried out on video data, noise reduction and filtering operation is carried out on sound data, and normalization processing is carried out on environment state data, so that the data availability is improved. By constructing an abnormal behavior analysis model and adopting a unique layered structure, compared with a traditional simple model, the complex incidence relation between multi-modal data can be effectively processed, and in a scene where personnel gather and are accompanied with noisy sound, the model can integrate personnel actions and postures in a video and sound features in an audio frequency, so that the model can be used for analyzing the abnormal behavior. Whether abnormal behaviors such as noisy and fighting occur or not is accurately judged, the accuracy of abnormal behavior judgment is greatly improved, and the misjudgment rate and the missed judgment rate are reduced.

The invention discloses an interface enhancement gradient design method of an anti-impact aviation glass laminated structure, and relates to the technical field of composite material design, the method comprises the steps of glass material preparation, interface enhancement gradient design, lamination compounding, quality detection and performance testing, the glass material comprises a glass layer material, a middle layer material and a transition layer material, the laminated composite process comprises the steps of pre-strain treatment, pre-pressing treatment, hot-pressing combination and cooling demolding, and has the advantages that by arranging the transition layers with components and performance in gradient change, the content of reinforcing materials such as nanometer titanium dioxide particles and graphene nanosheets in each transition layer is gradually increased; and compared with a traditional uniform or simple layered structure, the gradient design has the advantage that the phenomenon of interface stress concentration caused by performance difference between the glass layer and the polymer intermediate layer is remarkably reduced.

The present disclosure relates to methods and apparatuses for decoding data for (still or video processing into a bitstream). Two or more sets of segmentation information elements are obtained from the bitstream. Then, each of the two or more sets of segmentation information elements are inputted respectively into two or more segmentation information processing layers out of a plurality of cascaded layers. In each of the two or more segmentation information processing layers, the respective sets of segmentation information are processed. The decoded data for picture or video processing are obtained based on the segmentation information processed by the plurality of cascaded layers. Accordingly, the data may be decoded from the bitstream in an efficient manner in the layered structure.

The invention discloses a tunnel blasting vibration prediction method suitable for a sand shale interbed area, and mainly relates to the technical field of tunnel blasting. Comprising the following steps: S1, determining key factors influencing the vibration velocity; s2, building a blasting vibration prediction model in the sand shale interbed area; s3, carrying out data normalization processing; s4, introducing a BP neural network to train the prediction model; s5, introducing a particle swarm optimization algorithm and initializing related parameters of a particle swarm; s6, improving a particle swarm optimization algorithm; s7, a sand shale interbed tunnel blasting vibration prediction model of the improved particle swarm optimization BP neural network is obtained, the model is combined with blasting characteristic parameters of specific sand shale interbed area tunnel engineering for prediction, and a blasting effect prediction result is obtained; according to the method, important theoretical guidance can be provided for blasting vibration prediction of the stratified structure with changeable rock strata, and a practical safety evaluation tool is provided for ground surface vibration velocity control of similar projects.

A positive electrode material, a preparation method therefor and a use thereof. The positive electrode material comprises a core and a first shell layer, a lattice in a near-surface region of the core having a layered structure is doped with at least one of Co, Ti and Zr, and the first shell layer comprises a material capable of improving the ionic conductivity of the positive electrode material, or a material capable of improving ionic conductivity and electronic conductivity.

The invention relates to the technical field of wave-absorbing materials, and particularly discloses a Zn-Fe-Mn oxide-hard carbon composite material and a preparation method and application thereof. The preparation method comprises the following steps: preparing pomegranate-shaped spheres through a coprecipitation-calcination method; then, uniformly dispersing the mixture in a self-made solvent composition, and curing and molding the mixture through heating treatment; and finally, carrying out annealing treatment in a high-temperature tube furnace at the temperature of 800 DEG C in an argon protective atmosphere (the flow rate is 100 sccm), so as to prepare the Zn-Fe-Mn oxide-hard carbon composite material. The composite material has a unique three-dimensional layered structure, shows excellent broadband microwave absorption characteristics, and can realize efficient electromagnetic wave attenuation. And a new way is opened up for structural design and optimization of the high-performance wave-absorbing material, and the wave-absorbing material has a wide application prospect in the application fields of advanced stealth technology and novel electromagnetic shielding.

The invention discloses a Transform-based digital textbook automatic hierarchical design method. The method comprises the steps of obtaining digital textbook content, performing structured analysis, dividing the digital textbook content into a plurality of content units, and allocating a unique identifier; an improved Transform model is input, semantic modeling is executed, the cognitive hierarchy is controlled, and folding representation is generated; based on the folded semantic representation, initial layering is executed, a layered structure is constructed, and a sequence and hierarchical relationship is generated; constructing a self-evolution hierarchical decision maker, detecting conflicts in a hierarchical structure, and identifying a hierarchical inconsistent relationship; re-executing hierarchical processing based on the conflict relation updating rule to generate an updated hierarchical structure; and performing disturbance processing on the textbook structure, repeating modeling and layering processes, and verifying a hierarchical stability result. According to the method, the stable and automatic hierarchical design of the digital textbook is realized by improving Transform semantic modeling and self-evolution hierarchical decision.

The invention provides an energy storage container fireproof heat insulation performance evaluation method comprising the following steps: obtaining battery pack layout, temperature, electrolyte state and pressure change in an energy storage container, and carrying out pretreatment to obtain initial trigger characteristics of battery thermal runaway; acquiring material distribution and structural parameters of the bay firewall in the spraying erosion damage area, and simulating the erosion effect of high-temperature electrolyte spraying on the partition wall through a finite element analysis algorithm to obtain a partition wall damage distribution range; acquiring temperature gradient distribution data of the partition wall in the risk area where the fire breaks through isolation, and calculating thermal stress difference caused by temperature gradient to obtain the accumulation degree of structural fatigue; predicting the remaining service life of the partition wall structure according to the accumulation degree of structural fatigue, and adjusting the material thickness and the layered structure of the partition wall according to the design life requirement; and according to the generation probability of the partition wall cracks, dynamically updating the material ratio and the structure parameters of the partition wall, and generating a final firewall design scheme.

The utility model provides a workpiece transport vehicle with a layered structure, which comprises a vehicle body assembly and a storage assembly, the upper side surface of the vehicle body assembly is provided with the storage assembly used for storing workpieces, the vehicle body assembly comprises a bearing plate, a carriage and a frame, the lower side surface of the bearing plate is provided with the carriage used for storing the workpieces, and the frame is arranged on the carriage. Compared with the prior art, the storage device has the advantages that by arranging the storage assemblies, when the storage device is used, the storage assemblies are matched with the first storage pieces and the second storage pieces to form an up-and-down and front-and-back layered structure, the three-dimensional space of the compartment is fully utilized through the up-and-down and front-and-back layered layout, and therefore the storage device is convenient to use. The limited transport vehicle space is utilized most effectively, workpieces and objects of different types can be placed in the height direction or the front-back direction, the storage capacity is greatly improved, and more goods can be transported at a time.

The invention discloses a power distribution optimization scheduling method and system suitable for a commercial complex microgrid. According to the invention, a modular layered structure is introduced in modeling, and the whole system is divided into a main power supply scheduling layer, a renewable output prediction response layer and an energy storage flexible adjustment layer; and a mathematical optimization + reinforcement learning cooperation mechanism is adopted in solving, a deterministic part is accurately optimized by using an MILP model, an uncertain part is subjected to online generation of a strategy by using a reinforcement learning algorithm, and rapid iterative updating and feedback control of a scheduling result are realized. And meanwhile, through a boundary coupling coordination algorithm, synchronous updating of state variables among the sub-models and global feasibility of a scheduling solution are guaranteed, so that the response speed, the solution quality and the system robustness of the whole scheduling system are improved.

The invention provides a preparation method of an ultrahigh-temperature ceramic-based composite material with a layered structure, and relates to the technical field of ceramic-based composite materials. The method specifically comprises the steps that a PyC interface is deposited on the surface of a porous prefabricated body, then a SiC matrix and a PyC matrix are sequentially deposited on the surface of the PyC interface, then the porous prefabricated body is placed in molten salt powder containing metal powder and chlorine salt powder to be subjected to embedding treatment, then a carbon source is introduced, alloy powder serves as a raw material, reaction melt infiltration treatment is conducted on the carbon composite material, and the SiC / PyC composite material is obtained. The superhigh-temperature ceramic matrix composite material with the layered structure is obtained. Compared with the prior art, the preparation method has the advantages that molten salt is used as assistance, the ultra-high-temperature ceramic layered matrix is prepared on the semi-compact C / SiC composite material by adopting an embedding method, and finally, the densification of the composite material is realized by using a reaction melt infiltration process, so that the problem that the mechanical property of the ultra-high-temperature ceramic matrix composite material is poor due to the fact that carbon fibers are damaged by an existing RMI process is solved.

The invention relates to the technical field of layered products, and particularly discloses a skin material for wave-absorbing hiding and a preparation method. The skin material is of a layered structure and comprises a bionic micro-forest wave-transparent layer, a gradient transition layer, a wave-absorbing layer with a'skeleton-matrix 'dual-network structure, a reflecting layer and a heat-insulating layer which are sequentially arranged from top to bottom. A micro-cone array is arranged on the surface of the bionic micro-forest wave-transparent layer, so that broadband impedance matching is realized; the wave-absorbing layer comprises a three-dimensional ceramic skeleton and a magnetic-dielectric composite matrix filled in pores of the skeleton, and magnetic absorbents in the wave-absorbing layer are directionally arranged in the layer plane direction through a magnetic field auxiliary technology. The skin material prepared by the invention has excellent comprehensive performance of ultra-wideband wave absorption, high mechanical strength, light weight and high temperature resistance, and is particularly suitable for stealth requirements in the field of aerospace.

The present invention relates to a bimetallic layered hydroxide / phytic acid synergistic flame-retardant nylon 6 composite material and its preparation method and application, belonging to the technical field of flame retardant material synthesis. The composite material is prepared from nylon 6, bimetallic layered hydroxide and phytic acid. Wherein, the phosphate functional group in the phytic acid can chelate with the metal ion in the bimetallic layered hydroxide, thereby forming a novel flame retardant. When combustion occurs, the layered structure and thermal decomposition products such as metal oxides, metal phosphates, and carbon-containing aromatic network structure substances in the flame retardant help to suppress the release of smoke and toxic gases, and the release of metal ions and phosphorus-containing free radicals helps to suppress the spread of fire. Compared with pure nylon 6, the peak heat release rate and total heat release rate of the composite material are greatly reduced, the limiting oxygen index is greatly increased, and the vertical combustion test reaches V-0 level. At the same time, the raw material sources in the preparation method of the composite material are abundant, the operation is simple, and it is suitable for scaled-up production.

The invention relates to the technical field of production quality management, in particular to a visual traceability system and method applied to production quality safety of a synthetic mica material. The method comprises the following steps: acquiring production flow data of a synthetic mica material, and carrying out layered structure image processing and crystal layer defect analysis to generate a process node data set; constructing a digital twin process flow model based on the process node data set to obtain a process flow digital model; deploying data acquisition equipment for each process node based on the process node data set, and acquiring monitoring data in real time to obtain real-time state data of the process nodes; according to the method, the structured process node data and the digital twinborn process model are constructed, and real-time batch binding and abnormal path visualization are combined, so that high-efficiency and accurate traceability and intelligent management of the production quality safety of the synthetic mica material are realized.

The invention discloses low-reflection type electromagnetic shielding composite paper and a preparation method thereof, and belongs to the technical field of electromagnetic shielding. The invention provides low-reflection type electromagnetic shielding composite paper which is of a sandwich structure and is sequentially composed of an aerogel film layer, a conductive paper layer and a conductive thin film layer. Wherein the aerogel film layer is composed of a cellulose nanofiber base material, a cross-linking agent and a conductive filler; the conductive paper is obtained by impregnating plant fiber-based body paper with a dispersion liquid of a conductive filler; the conductive film is composed of nanocellulose fibers and a conductive filler. The electromagnetic shielding paper has a unique layered structure, and impedance matching of the electromagnetic shielding paper is improved through interlayer conductive gradient. The prepared low-reflection type electromagnetic shielding paper has excellent electromagnetic shielding performance and ultralow reflection efficiency at the same time.

The invention discloses a privacy protection neural network reasoning method based on multi-point evaluation. According to the method, in the reasoning process of the privacy protection neural network, a given nonlinear function is constructed into a K-segment k-degree polynomial, a safe multiplication tree and a safe remainder tree are established, and then the remainder polynomial is safely evaluated. Due to the fact that the polynomial power needing to be evaluated in the online stage is reduced, the number of self-multiplication terms is reduced, the number of communication rounds of overall polynomial evaluation is reduced, the number of calling times of a secure multiplication triple in secret sharing is reduced, and the overhead of offline pre-calculation is correspondingly reduced. In addition, the hierarchical structure of the secure multiplication tree and the remainder tree supports multi-point input parallel computing, and the parallel computing capability of a modern multi-core processor or a GPU can be fully utilized.

The invention belongs to the technical field of nanofiber thin film materials, and relates to a high-strength and high-temperature-resistant ultra-thin PBO nanofiber membrane as well as a preparation method and application of the high-strength and high-temperature-resistant ultra-thin PBO nanofiber membrane. The prepared ultra-light and ultra-thin PBO nanofiber membrane comprises a three-dimensional interconnected network structure formed by PBO nanofibers, and the nanofibers are crosslinked through pi-pi interaction; the three-dimensional interconnected network structure is compressed and densified at room temperature to form a layer-by-layer stacked layered structure, the thickness of the ultra-light and ultra-thin PBO nanofiber membrane is 10-50 microns, the tensile strength is greater than or equal to 120 MPa, and the thermal decomposition temperature is greater than or equal to 650 DEG C; the preparation process provided by the invention is simple, does not involve high-temperature treatment and is low in energy consumption, specifically, a uniform aerogel intermediate is formed through freeze drying, and then room-temperature compression densification is combined, so that the problems of fiber segregation and interface stress concentration caused by high-temperature treatment are avoided, and the prepared PBO nanofiber film is light in weight, high in strength, flame-retardant and high-temperature-resistant, and has good application prospects. The application prospect is wide.

The utility model provides a heating assembly and an aerosol generating device, the heating assembly comprises a supporting tube, the supporting tube comprises a heat resistance area and a heat conduction area, and the heat resistance area is used for blocking heat conduction of the adjacent heat conduction area; the heating coating is arranged on the outer surface of the supporting pipe and covers the heat resisting area and the at least one heat conduction area. According to the application, the heat resistance area is arranged, so that heat transfer can be slowed down, and heat is concentrated in the preset area; meanwhile, as the heat resistance area is arranged on the supporting pipe, a heat resistance structure does not need to be machined at the heating coating, the heating coating can be of a complete coating structure, and microcracks formed at the heating coating due to machining can be avoided. In addition, the complete coating structure has a complete layered structure, and the compression resistance is higher.