31 results about "Layer group" patented technology

The invention provides an optimization method for predicting the long-term welding reliability of a wire harness terminal and a conductor, and the method comprises the steps: collecting temperature and time data in a welding process, processing the data through a thermal simulation model, and obtaining the change trend of conductor lattice arrangement; according to the change trend of conductor lattice arrangement, the initial thickness and component distribution of oxide layer formation are obtained, and microstructure features of an oxide layer group are determined; aiming at the microstructure characteristics of the oxide layer group, simulating a long-term use environment by adopting an accelerated aging test to obtain a prediction curve of resistance increase; according to the quantitative model of the aging behavior, a performance evolution rule in the actual use environment is obtained, and the incidence relation between welding parameters and long-term reliability is determined; for a process scheme for improving the stability of a conductor, the resistance change of the conductor in a high-temperature environment is simulated and verified, and the accuracy of quantitative correlation is judged.

The invention belongs to the technical field of impact protection and energy absorption, and particularly relates to a double-platform energy-absorbing buffer material with a negative Poisson's ratio characteristic, which comprises a top layer, an energy-absorbing layer group and a bottom layer which are fixedly arranged in sequence, the energy absorption layer set is composed of a plurality of stacked energy absorption layers, and each energy absorption layer comprises a plurality of energy absorption units arranged in a rectangular array. Each energy absorption unit comprises two orthogonally-arranged energy absorption unit cell structures, each energy absorption unit cell structure forms a first energy absorption cavity through a connecting face and a first inwards-concave structure, and a transverse rod and a second inwards-concave structure are arranged on the outer side of each first inwards-concave structure to form a second energy absorption cavity. The adjacent energy absorption units in the layers are connected through transverse rods, and the energy absorption layers are fixed through connecting faces. By means of various step-by-step buckling deformations of the two-stage concave structure, the first stress platform and the second stress platform which are independently adjustable are sequentially generated in the compression process, and efficient two-stage energy absorption is achieved; the three-dimensional structure has the negative Poisson's ratio effect and multidirectional bearing capacity, and can effectively avoid transverse expansion due to compression.

An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry determines whether a determined relationship between a total number of one or more layer groups and a total number of one or more parameters is satisfied. The one or more layer groups each include at least one output layer, and the one or more parameters each indicate a performance requirement for a decoder. When the determined relationship is satisfied, the circuitry determines, using a determined method, a correspondence relationship for associating any of the one or more parameters with each of the one or more layer groups, and omits storing information indicating the correspondence relationship in a common header shared between layers in the one or more layer groups.

A waveguide assembly for exciting / deflecting the partial light beams of at least one light beam pair, comprises a layer stack made of a plurality of layers stacked in a stacking direction, the layer stack comprising: two transparent dielectric cover layers, each including at least one transparent cover layer; a resonator stack having a predetermined number of layers between the two cover layer stacks, wherein at least one layer group including some successive layers in the stacking direction of all the layers of the resonator stack forms a resonator that includes at least one light-deflecting structure; at least one switching assembly, by way of which a phase change of at least one of two partial light beams of a light beam pair which can be guided between the outer boundaries of the cover layer stacks can be locally caused at least intermittently, which can be propagated without self-interference in the two cover layer stacks and with self-interference in the at least one resonator.

The invention discloses a high-temperature-resistant lens structure, which comprises a substrate, a substrate body and a hardened layer, and the hardened layer is coated on the substrate body; the at least one thin film layer group covers one side of the substrate, the thin film layer group comprises at least two first refractive index thin film layers and at least one second refractive index thin film layer, the refractive index of the first refractive index thin film layer is lower than that of the second refractive index thin film layer, and the refractive index of the second refractive index thin film layer is lower than that of the first refractive index thin film layer. The first refractive index thin film layer, the second refractive index thin film layer and the first refractive index thin film layer are sequentially arranged on the substrate, so that at least one of the first refractive index thin film layers contains 5wt%-15wt% of Ta2O5 and 85wt%-95wt% of SiO2; the waterproof coating is coated on the thin film layer group; therefore, the difference of expansion coefficients of the first refractive index thin film layer and the second refractive index thin film layer to temperature can be reduced, so that the thin film layers are not easy to separate and have the capability of resisting large temperature change when the temperature changes violently, such as temperature rise.

A structure of an infrared thermopile sensor chip and a manufacturing method therefor. The manufacturing method comprises the following steps: a, providing a substrate layer (100), the substrate layer (100) having an upper surface (110) and a lower surface (120); b, depositing a dielectric-dipole layer group (200) on the upper surface (110) of the substrate layer (100), wherein the steps of depositing the dielectric-dipole layer group (200) comprise: b1, depositing a first dielectric (211b) on the upper surface (110) of the substrate layer (100), and patterning the first dielectric (211b) to obtain a first dielectric layer (211) having a plurality of dielectric holes (420), the dielectric holes (420) being communicated with an upper surface of the first dielectric layer (211) and the substrate layer (100); and b2, depositing a first dipole layer (221) on the upper surface of the first dielectric layer (211), the first dipole layer (221) filling the dielectric holes (420); and e, from the lower surface (120) of the substrate layer (100), etching the substrate layer (100) and the first dipole layer (221) in the dielectric holes (420), so as to manufacture an infrared thermopile sensor chip having a back cavity (400), thereby improving heat dissipation capability, and increasing thermopile signal quantity.

The invention provides an LDPC (Low Density Parity Check) decoding method and device, equipment and a storage medium. The method comprises the following steps: dividing a check matrix into multiple layers according to rows; combining the plurality of layers to obtain a plurality of layer groups; wherein each layer group is numbered in sequence; and based on each layer group, decoding according to an inverted sequence. According to the method provided by the invention, after the rows are layered, the layers are grouped, and decoding is carried out according to an inverted sequence based on each layer group, so that processing time delay caused by layer jump can be avoided, and implementation of parallel pipeline is facilitated.

The invention discloses an antiferromagnetic metal single crystal with a three-dimensional stacking ordered structure and a preparation method of the antiferromagnetic metal single crystal. The preparation method comprises the following steps: uniformly mixing Fe powder, Co powder, Ge powder and Te powder, and then loading the mixture into a quartz tube together with a transport agent; putting the sealed quartz tube into a double-temperature-zone tubular furnace for calcining to obtain the antiferromagnetic metal single crystal; a unit cell of the antiferromagnetic metal single crystal is formed by stacking a plurality of layer structures layer by layer, and each layer structure is provided with two Te layers, a Ge layer and a Fe / Co layer, wherein the Ge layer and the Fe / Co layer are respectively positioned between the two Te layers; the plurality of layer structures are grouped in pairs to form a plurality of layer groups which are sequentially stacked, the two layer structures in the same layer group are in an AA stacking mode, and the two layer structures in the two adjacent layer groups are in an ordered staggered stacking mode. The antiferromagnetic metal single crystal has the characteristics of good cruising antiferromagnetism, neel temperature higher than room temperature, three-dimensional stacking ordered structure and the like, and promotes the development of related fields.

The application provides a product defect intelligent detection method and system based on small sample learning, comprising the following steps: acquiring a defect picture; calling a DINO algorithm to process the defect picture to obtain a first processing layer; calling a Swin Transformer algorithm to process the defect picture to obtain a plurality of down-sampling layers; replacing one layer in the plurality of down-sampling layers with the first processing layer to form a candidate layer group; selecting a plurality of layers including the first processing layer from the candidate layer group to form a to-be-processed layer group; and outputting the to-be-processed layer group to a small sample target detection learner for processing and detection. The application can effectively combine the advantages of the DINO algorithm and the Swin Transformer algorithm, and take into account the fine granularity and semantic information of image processing.

The invention provides a self-adaptive ultrasonic detection and defect identification method for a composite material, and belongs to the technical field of ultrasonic detection.The self-adaptive ultrasonic detection and defect identification method for the composite material comprises the specific steps that firstly, preparation is conducted before detection; 2, collecting full-matrix data of the one-way plate; 3, calculating a core elastic constant of the composite board; 4, deducing the velocity distribution of each layer group of the composite board; 5, collecting full-matrix data of the composite board; step 6, adaptively correcting imaging delay; and 7, performing full-focusing imaging and judgment on the defects of the composite board. According to the method, defect subtle features which are difficult to recognize by human eyes in the full-focus imaging picture can be automatically mined through the deep learning model, the problems of missing detection and false detection caused by subjective judgment deviation are effectively avoided, rapid and accurate classification and positioning of various defects can be realized through the deep learning model, the detection period is greatly shortened, and the detection efficiency is improved. And reliable technical support is provided for high efficiency and precision of ultrasonic detection of the composite material.

A sliding member may include a metallic base, at least one intermediate bonding layer disposed on the metallic base, and a multilayer protective coating disposed on the intermediate bonding layer. The at least one intermediate bonding layer may be composed of at least one metal. The multilayer protective coating may include a plurality of CrAlN layers and a plurality of Cr(Al)N layers arranged in an alternating manner. The multilayer protective coating may include a plurality of periodicity layer groups, each of which may be defined by a CrAlN layer and an adjacent Cr(Al)N layer. The plurality of CrAlN layers may have a higher Al content than the plurality of Cr(Al)N layers. A thickness ratio of the CrAlN layer to the Cr(Al)N layer in each periodicity layer group may be from 1 to 10. The multilayer protective coating may have a total Al content of 15 to 40 atom-%.

Provided are: a hard coating that has a novel structure and has excellent wear resistance and deposition resistance with respect to a wide range of work materials; and a hard coating–coated tool.　A hard coating according to the present invention is formed by layering a first layer group 34 and an alternating nanolayer layer 36 that is a second layer group. The alternating nanolayer layer 36 is an alternating stack of at least three layers from among a nanolayer A layer 36a, a nanolayer B layer 36b, a nanolayer C layer 36c, and a nanolayer D layer 36d. The relationship between the hardness and the toughness of the coating can be optimized and the durability of the coating improved by varying the growth of particles at each layer by selecting the compositional ratio and additional elements of each layer to control crystal size and the relationship between crystal orientation (200) and orientation (111).

The utility model provides a shell and electronic equipment. The housing includes: a transparent substrate; the transparent texture layer group comprises a texture layer and a first substrate layer which are arranged in a laminated manner; the first transparent adhesive layer, the first substrate layer and the transparent substrate are laminated through the first transparent adhesive layer, and the first substrate layer is arranged between the texture layer and the transparent substrate. According to the texture shell, richer and diversified visual perception can be provided, and the application range of the texture shell is wider.

The invention relates to an array substrate, a display panel and a display device. The array substrate comprises a substrate; the driving layer group is located on one side of the substrate, the driving layer group comprises at least two metal layers, the at least two metal layers comprise a first metal layer and a second metal layer which are arranged in an insulating mode, and the second metal layer is located on the side, close to or away from the substrate, of the first metal layer; at least part of the first metal layer comprises a first sub-metal layer and a second sub-metal layer which are stacked, the first sub-metal layer is located between the substrate and the second sub-metal layer, and the orthographic projection of the second sub-metal layer on the substrate and the orthographic projection of the first sub-metal layer on the substrate are at least partially overlapped. According to the array substrate adopting the technical scheme, when the screen body of the display panel is impacted, at least part of the first metal layer is of a double-layer film design, so that fracture extension of the film layer can be blocked, the fracture influence of the film layer can be reduced, the impact resistance is improved, the functionality of the film layer is ensured, and wide application is facilitated.

The application provides a gallium nitride high-power device multilayer structure growth control method and system, relates to the technical field of semiconductors, and comprises sequentially epitaxially growing a nucleation layer, a transition layer and a gradient stress buffer layer group on a substrate, controlling the difference value of the lattice mismatch degree of the gallium aluminum nitride layer in the buffer layer to decrease by synchronously regulating the growth temperature and the trimethyl gallium flow, and dynamically determining the thickness of a gallium nitride insertion layer based on the accumulated elastic strain energy to release the strain. Then, a stress modulation layer composed of a gallium aluminum nitride superlattice with the aluminum component periodically fluctuating is grown, the periodic stress field of the stress modulation layer is used to block the upward extension of dislocation defects, and finally, a channel layer and a barrier layer are grown. The method can effectively reduce the defect density of the epitaxial layer and improve the performance and reliability of the gallium nitride high-power device.

The invention relates to a high-hardness HUD free-form surface mirror and a magnetron sputtering coating preparation method thereof, a plastic free-form surface mirror is sequentially provided with a combined film layer and a superhard optical thin film layer group, and the superhard optical thin film layer group comprises an Al film layer, a first SiO2 film layer, an Nb2O5 film layer and a second SiO2 film layer which are sequentially arranged on the combined film layer. The method comprises the following steps: putting a high polymer material HUD free-form surface mirror into a vacuum multi-cavity magnetic control coating machine, and introducing inert gas; the first layer is plated with a third SiO2 film layer by adopting a CVD (Chemical Vapor Deposition) method and is combined with the high polymer material HUD free-form surface mirror to form the third SiO2 film layer; and plating the superhard optical thin film layer group by using a PVD (Physical Vapor Deposition) method, and sequentially forming an Al film layer, a first SiO2 film layer, an Nb2O5 film layer and a second SiO2 film layer on the third SiO2 film layer. By optimizing the film system design and the preparation process, the HUD free-form surface mirror achieves high hardness and meets the requirement for high-temperature storage.

The invention relates to the technical field of metamaterials, and discloses a layered metamaterial with double negative refractive indexes, which comprises a substrate and a periodic layer group, and the periodic layer group comprises metal layers and dielectric layers which are alternately stacked on the substrate. The preparation method of the layered metamaterial with the double negative refractive indexes comprises the steps that S5, annealing treatment is conducted on the formed substrate and the periodic layer set, the annealing temperature is 300-600 DEG C, the annealing time is 1-5 h, and the layered metamaterial with the double negative refractive indexes is obtained. According to the layered metamaterial with the double negative refractive indexes and the preparation method of the layered metamaterial, the metal layer and the dielectric layer form a tightly combined interface, the interface roughness is small, interlayer defects are reduced, meanwhile, through annealing treatment, interface atoms are promoted to be rearranged, the defect density is reduced, and interlayer binding force is enhanced; the problems that the metal layer and the dielectric layer are low in interface bonding strength and easy to peel off or oxidize are solved, and electromagnetic performance attenuation caused by structural damage is reduced.

The utility model discloses an AR (augmented reality) film which comprises a surface film layer group, an AR using layer group and a bottom film layer which are attached in sequence, the AR use layer group comprises an AR coating group, a hardened coating, a base material layer, a colorful coating and a pressure-sensitive adhesive layer which are attached in sequence; the AR coating group comprises an AF coating and a functional coating, and the functional coating comprises one or a combination of more of a silicon dioxide coating, a niobium pentoxide coating and a silicon oxide coating; according to the utility model, the AR coating group and the colorful coating are reasonably arranged, and on the basis of having the anti-reflection and anti-reflection functions of a traditional AR film, the visual effect of the AR material is enhanced by utilizing the optical performance of the colorful coating and having the light arrangement polarization function, so that the overall color phenomenon looks more uniform and gorgeous, and the visual feeling of consumers is improved; and the user experience is improved. According to the preparation method provided by the utility model, the AR film with good anti-reflection and anti-reflection effects and good visual effect can be rapidly and stably prepared, and wide popularization and application are facilitated.

The utility model relates to a cover plate with a composite coating structure, which comprises a glass substrate serving as a support foundation of an integral structure; the coating layer group is arranged on the front surface of the glass substrate and sequentially comprises a Cu-Zr alloy layer, a Cu-Cr-Zr alloy layer and a copper-nickel alloy layer from inside to outside; the ink layer is arranged in a frame area on the back of the glass substrate, and the copper-silver alloy layer is located below the ink layer. And the total thickness of each layer of the coating layer group and the copper-silver alloy layer does not exceed 200nm. According to the technical scheme, the hardness and wear resistance of the glass surface are improved; the hardness and the corrosion resistance are further enhanced through the Cu-Cr-Zr alloy layer; and the copper-nickel alloy layer is used as the outermost layer, so that external scratch and corrosion are effectively resisted, and the inner-layer coating film is protected. Meanwhile, due to the application of the photochromic ink layer, the cover plate can show rich color changes according to the change of light or temperature, and the interestingness and attractiveness of the product are improved.

The invention belongs to the technical field of additive manufacturing, and relates to a point-surface combined laser additive manufacturing method and system.The method comprises the steps that a virtual model file of a to-be-printed part is established, the virtual model file is sliced, and slicing layers are obtained; marking the slice layers according to the structural features of the slice layers to obtain marked slice layers; the marked slice layers are divided into a tape laying layer group, a silk laying layer group and a silk tape combination layer group; a laser additive manufacturing path is planned based on the tape laying layer set, the silk laying layer set and the silk tape combination layer set; and on the basis of the marked slice layer and the laser additive manufacturing path, a point-surface combination integrated additive manufacturing task of the continuous fiber reinforced resin composite material is planned, and laser additive manufacturing is conducted according to the point-surface combination integrated additive manufacturing task. According to the invention, the effects of greatly improving the manufacturing efficiency and reducing the comprehensive cost on the whole can be realized.

The present disclosure relates to an information processing apparatus and method capable of suppressing an increase in load of reproduction processing.The metadata including the spatial configuration information of the subgroup and the dependency information of the subgroup and the layer-group is generated on the basis of the bitstream of the geometry of the 3D data, and the file storing the bitstream and the metadata are generated. Further, on the basis of the spatial configuration information of the subgroup and the dependency information of the subgroup and the layer-group stored in the file as metadata, a bitstream of the geometry of the 3D data corresponding to the desired layer-group and the subgroup stored in the file is extracted, and the extracted bitstream is decoded. The present disclosure can be applied to, for example, an information processing apparatus, an information processing method, or the like.

The present disclosure relates to a semiconductor structure and a method for manufacturing the same. The semiconductor structure comprises a substrate, a patterned stack structure on the substrate, the patterned stack structure comprising first dielectric layers and first conductive layers stacked alternately, the first conductive layers comprising a wire connection portion and first conductive wires connected to the wire connection portion in a first direction, and a step structure on the substrate, the step structure comprising a plurality of step layer groups stacked, the plurality of step layer groups forming a plurality of steps distributed along a second direction, and each step layer group comprising a second dielectric layer, a second conductive layer connected to the wire connection portion in the first direction, and a third dielectric layer, in the same step layer group, the third dielectric layer and the second conductive layer are arranged along the second direction, and the orthographic projection of the third dielectric layer and the second conductive layer on the substrate overlaps the orthographic projection of the second dielectric layer on the substrate, and the orthographic projection areas of the plurality of second conductive layers of the plurality of step layer groups on the substrate are the same. The embodiments of the present disclosure improve the RC delay between the conductive wires of each layer.

The invention relates to the technical field of insulator surface area measurement, in particular to an insulator surface area measuring tool and method, the measuring tool is of a sheet structure, the sheet structure comprises a main material layer, a distinguishing layer group and a bonding layer group, the distinguishing layer group is arranged on one side of the main material layer, and the color of the distinguishing layer group is different from that of the surface of an insulator to be measured; the bonding layer set is arranged on the other side of the main material layer and used for being bonded with the surface of the insulator to be detected or the distinguishing layer set, and the bonding force between the bonding layer set and the distinguishing layer set is larger than the bonding force between the bonding layer set and the surface of the insulator to be detected. By utilizing the characteristics of the measuring tool after the specific structure and the specific material are combined, the measuring tool can be separated from the surface of the measured insulator in the whole form of the measuring tool on the premise of not changing the whole surface area of the measuring tool after the irregular surface of the insulator is completely attached and covered; and no viscous substance is left on the surface of the detected insulator, so that the calculation result is more accurate.

The utility model relates to a flat cable resistant to a strong acid leakage test. The flat cable comprises a conductive layer. The covering layer group is used for comprehensively protecting the conducting layer, the covering layer group comprises an upper covering film and a lower covering film, and the upper covering film and the lower covering film are arranged above and below the conducting layer respectively; the shielding layer group is used for carrying out anti-interference protection on the conducting layer, the shielding layer group comprises an upper shielding film and a lower shielding film, the upper shielding film is arranged above the upper covering film, the lower shielding film is arranged below the lower covering film, the conducting layer comprises two loop conducting conductors and two induction alloys, the two induction alloys are sequentially arranged at the central position, and the two loop conducting conductors are arranged on the upper covering film. And the two loop conductive conductors are respectively positioned on the outer sides of the two induction alloys. According to the utility model, the covering layer group and the shielding layer group can be used for conducting the internal conducting layer, the problem that the conducting circuit is easy to break because the upper and lower films are easy to crack when the flat cable in the market encounters strong acid is solved, and the working stability of the whole flat cable is improved.

A superparamagnetic tunnel junction element and a computing system using same, wherein the tunnel junction element has excellent operational stability against an external magnetic field and is suitable for the computing system based on probabilistic computing. The superparamagnetic tunnel junction element includes a first ferromagnetic layer group containing a ferromagnetic material, a second ferromagnetic layer group containing a ferromagnetic material, and a barrier layer disposed between the first ferromagnetic layer group and the second ferromagnetic layer group, wherein the first ferromagnetic layer group 14 includes a (1-1)th ferromagnetic layer, a (1-2)th ferromagnetic layer, and a first nonmagnetic coupling layer, the (1-1)th ferromagnetic layer is made of a ferromagnetic material, the magnetization direction thereof changes with a first time constant, the first time constant is one second or shorter, and the first nonmagnetic coupling layer contains at least one of Ru, Ir, Rh, Cr, and Cu.

The invention discloses a multi-model and multi-tenant-oriented key value cache scheduling method and device, equipment and a medium, and relates to the technical field of reasoning acceleration, and the method comprises the steps: obtaining a multi-stage stability portrait of a target large language model, so as to determine a hardware calculation node; the multi-level stability portrait comprises a pre-divided cache scheduling set of the large language model and a preset Top-K sampling reference parameter; the cache scheduling set comprises a head group and / or a layer group; the head group is obtained by aggregating attention heads according to the stability level, and the layer group is obtained by aggregating attention layers based on the stability level of the head group; the stability level is determined based on the stability score division of each attention head, and at least three level types are included; calculating a theoretical video memory occupation amount for key value caching to determine a parameter scaling factor of the request, and determining a Top-K sampling actual parameter; when reasoning processing is carried out, the generated target key value cache is stored in a layered mode, and dynamic scheduling is carried out in the decoding process.

The present disclosure relates to a memory and a method for forming the same. The method for forming the memory comprises the following steps: forming a stack layer on a substrate surface, the stack layer comprising layer isolation layers arranged at intervals along a first direction, and a sacrificial layer group located between adjacent layer isolation layers, the sacrificial layer group comprising a first sacrificial layer, a second sacrificial layer and a third sacrificial layer stacked in sequence along the first direction, the stack layer comprising a transistor region, wherein the first direction is a direction perpendicular to a top surface of the substrate; removing the first sacrificial layer of the transistor region to form a first void; forming an active pillar in the first void; removing the second sacrificial layer and the third sacrificial layer of the transistor region to form a second void; and forming a word line covering part of the active pillar in the second void. The present disclosure improves the yield and performance of the memory and simplifies the manufacturing process of the memory.

The application discloses a large-size h-shaped composite beam hot diaphragm forming tool and forming method and belongs to the technical field of composite material design and manufacturing. The h-shaped composite beam forming is decomposed into one L-shaped preform, one C-shaped preform and one flat plate preform by adopting the hot diaphragm forming process. Firstly, according to the designed layer, the flat plate layer group is formed by tape laying or manual lay-up, and then the L-shaped preform, the C-shaped preform and the flat plate preform are formed by the hot diaphragm forming process. Finally, the three preforms and the "0 degree fiber filling" layer are combined together, and the h-shaped preform is obtained by the hot diaphragm forming process again. The application simplifies the lay-up operation, improves the production efficiency, avoids the R angle area lay-up bridging, and guarantees the h-shaped composite beam profile quality and layer position precision.

The invention relates to an optical element (1) comprising: a substrate (2), and a coating (3) that is partially reflective or antireflective for radiation (4), preferably for radiation in the UV or VIS wavelength range, wherein the coating (3) comprises a plurality of first layers (6) and second layers (7), wherein the first layers (6) comprise a first, preferably fluoride or oxide, material, and the second layers (7) comprise a second, preferably fluoride or oxide, material whose refractive index (n2) for the radiation (4) differs from the refractive index (n1) of the first material for the radiation (4). The coating (3) comprises at least one layer group (8) for reflectivity adjustment, which includes a third layer (9) made of a third material that is not identical to the first and second materials.The invention also relates to an optical arrangement, preferably a laser or a semiconductor technology system, comprising: at least one optical element (1) designed as described above, and a method for manufacturing an optical element (1).

The utility model relates to an expansion joint structure which comprises a guide cylinder, the structure comprises a corrugated pipe group, the corrugated pipe group wraps the guide cylinder, the corrugated pipe group comprises a first layer group and a second layer group, and an interlayer is formed between the first layer group and the second layer group; the structure further comprises a pumping and draining assembly, and the pumping and draining assembly is partially connected to the interlayer. The corrugated pipe set composed of the first layer set and the second layer set is arranged and wraps the guide cylinder to form inner and outer protection, the interlayer is further formed between the first layer set and the second layer set, the pumping and draining assembly is used for vacuumizing the interlayer, then the effective cold insulation and protection effects are achieved on the inner layer pipeline, and the service life of the inner layer pipeline is prolonged. Meanwhile, whether the first layer group or the second layer group leaks or not can be detected. In addition, the first layer set and the second layer set are each composed of a plurality of corrugated pipes, and the axial stress and the transverse stress of the expansion joint are further compensated.