15 results about "Lateral expansion" patented technology

The application discloses a low-air-pressure-drop flocking bed and a tensile-resistant forming process thereof. The flocking bed comprises a bed body main shell, a multi-air-chamber isolation structure, a tensile-resistant constraint net, a low-air-pressure-drop sealing valve assembly and a flocking surface layer. The bed body is divided into a main load-bearing air chamber and a plurality of auxiliary air chambers by longitudinal and transverse partition plates. The air chambers are communicated through one-way flow-limiting air paths. Local air leakage does not affect overall support. The tensile-resistant constraint net comprises a type I binding structure formed by high-strength fiber filaments. The two ends are fixed on upper and lower panels through high-frequency hot melting welding. The constraint net limits lateral expansion deformation of the bed body after inflation, keeps the bed surface flat, and adopts a double sealing mechanism of an elastic sealing diaphragm and a check valve core to greatly reduce air pressure attenuation at the valve. The forming process comprises the following steps: material compounding, high-frequency welding of binding filaments, air chamber partition plate welding, overall mold welding, air tightness detection and electrostatic flocking. Process parameters of each step are quantifiable and controllable, and the process is suitable for large-scale production.

This invention relates to the fields of microelectromechanical systems (MEMS) and new energy technologies, and discloses a piezoelectric energy harvester based on a nonlinear gradient negative Poisson's ratio structure. Its elastic matrix has a fixed end and a free end, with a negative Poisson's ratio structural segment on it. The piezoelectric transducer element is bonded to the surface of the negative Poisson's ratio structural segment via an epoxy resin adhesive layer. The core innovation lies in the nonlinear monotonically decreasing thickness of the elastic matrix from the fixed end to the free end along its length. This change profile is defined by a specific cubic polynomial function, which can accurately approximate the theoretical model of an isostress beam, making the stress distribution on the matrix surface tend to be uniform during vibration. Simultaneously, the lateral expansion characteristics of the negative Poisson's ratio structural segment and the longitudinal stress enhancement effect of the nonlinear thickness synergistically amplify the charge output of the piezoelectric element. This invention significantly improves the utilization efficiency of piezoelectric materials and the power density of the energy harvester, and has the advantages of compact structure, high energy conversion efficiency, and mass production via 3D printing.

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.

The application relates to the technical field of display screens, and discloses a display screen with extendable auxiliary screens, which comprises a main display screen and a docking station. The inside of the docking station is provided with a lateral expansion mechanism and a vertical expansion mechanism. The lateral expansion mechanism comprises lateral expansion grooves arranged on the left and right sides of the docking station, the two lateral expansion grooves are staggered, the inside of the lateral expansion groove is provided with a fixing groove, the inside of the fixing groove is provided with a horizontal moving assembly, and the horizontal moving assembly is connected with a lateral auxiliary screen through a first pushing assembly. The priority order of the auxiliary screen ejection and the fixed size ratio are set, the layered storage structure is combined, the display area is sufficiently expanded, the storage volume of the equipment is minimized, the portability of the equipment is improved, the cross rail system is adopted to provide independent movement tracks for the auxiliary screens, the hierarchical locking and releasing mechanism is matched, and the orderly ejection and retraction of the auxiliary screens are realized.

The invention belongs to the field of urban underground space, and provides a protection lap joint method for a lateral expansion waterproof layer and an underground structure obtained through the method, and the method comprises the steps that a foundation pit is excavated, the excavation part is the distance from the upper portion of a newly-built structure to the ground, then waterproof construction is carried out, and construction of a newly-built structure body is carried out; the fender posts and the existing structure are cut for the first time, so that the existing structure communicates with the newly-built structure; the protection plate is placed between the existing structure waterproof layer and the fender post; the fender posts and the existing structure are cut for the second time, and then the waterproof layer of the existing structure and the waterproof layer of the newly-built structure are in lap joint; and the newly-built structure and the existing structure are poured together.

The application discloses a cast-in-situ concrete arc-shaped beam reinforcing device and a reinforcing method, and relates to the technical field of reinforcing cast-in-situ concrete arc-shaped beams, in particular to a cast-in-situ concrete arc-shaped beam reinforcing device and a reinforcing method. The variable processing structure is a multi-single-body hinged hinge plate, cooperates with a phase-change liquid capsule with a built-in phase-change material and a flexible steel sheet, and can realize accurate fitting and rigid support of arc-shaped beams with different curvatures; the rigid support structure is driven by a gear shaft flywheel with universal shaft synchronous transmission to drive a stacked-tooth assembly support rod to form an overall support frame, and simultaneously utilizes a piston connecting rod to compress hydraulic oil to offset lateral expansion force of concrete; the near-vibration vibrating structure can automatically adjust the position according to the curvature of the hinge plate, and through hydraulic linkage, a vibrating rod can be turned by 90 degrees and automatic vibrating operation can be completed; the application can be flexibly adapted to various curvature arc-shaped beams, can eliminate surface concave-convex defects of the beam body, can cover edge corner easy-to-miss vibrating areas, and can avoid damage to the formwork and the reinforcing steel bar caused by manual vibrating.

This invention relates to the field of hot-end cooling technology for gas turbines, and discloses a B-type film cooling hole structure and construction method for gas turbines. The structure includes a solid wall with an outer wall surface and an inner wall surface, the outer wall surface being used to contact the high-temperature mainstream. Film cooling holes are obliquely arranged on the solid wall, each comprising a coaxial and connected cylindrical section and an expansion section. A connection port is formed at the junction of the cylindrical and expansion sections, and the profile of the connection port is a circular inlet profile. The end of the cylindrical section away from the expansion section penetrates the inner wall surface to form a cold air inlet, and the end of the expansion section away from the cylindrical section penetrates the outer wall surface to form a cold air outlet, the profile of the cold air outlet being an outlet profile. This invention can form an ideal reverse kidney vortex structure, promoting the lateral expansion of cold air, increasing the transverse coverage area of ​​the film cooling system, improving the film cooling adhesion effect, and thus improving the film cooling efficiency.

The utility model belongs to the fireworks manufacturing technical field especially is a kind of demoulding auxiliary device of fireworks making machine, including metal support, the bottom fixed mounting of metal support has metal leg, the inside fixed mounting of metal support has fixed plate.Working when the first motor in third protective housing drives movable shaft and movable rod and goes up jacking, drives the whole ascending of receiving plate and fourth protective housing on it, subsequently the second motor in fourth protective housing drives rotating gear, drives moving rod and connecting rod, make the sliding rod of inside outward lateral expansion, prop up the paper tube on mould, the sliding rod of expansion can adapt to different shape, avoid replacing parts when carrying out demoulding to different shape paper tube, then first motor moves downward and makes paper tube drop, and the model after demoulding is moved to inclined plate by first rotating shaft, and is slid out by inclined plate guide guiding device, in this process, the use of manpower can be avoided, and the time used for demoulding can be reduced.

This invention provides a mortar sealing and flow control device for steel-reinforced columns and its construction method, relating to the field of building construction technology. It includes a reinforcing angle steel that covers the outside of a concrete column. A flow control structure is provided on the reinforcing angle steel. By setting the flow control structure, the injected structural adhesive can completely fill all gaps between the reinforcing angle steel, the reinforcing mortar, and the original concrete column. After the structural adhesive cures, the steel hoop and the concrete column form a rigid load-bearing structure without interface defects. The reinforcing mortar can uniformly transmit the clamping force and provide continuous and effective lateral restraint to the concrete column, limiting the lateral expansion deformation and crack propagation of the concrete column under pressure. This significantly improves the axial compressive bearing capacity, shear bearing capacity, and ductile energy dissipation capacity of the concrete column, fundamentally solving the problems of insufficient adhesive injection leading to the failure of the mortar restraint and substandard reinforcement strength in traditional processes.

The invention relates to a selective atomic layer deposition method for sequential double passivation, which comprises the following steps: S1, providing a substrate, the surface of which comprises a dielectric material region and a metal material region which are adjacently arranged; s2, depositing a first passivation layer on the dielectric material area of the substrate, wherein the first passivation layer is from a silicon inhibitor; s3, a polymer is deposited on the substrate provided with the first passivation layer, the polymer is deposited on the metal material area, and a second passivation layer is formed; the upper surface of the second passivation layer is higher than the upper surface of the first passivation layer; and S4, forming a dielectric material film on the surface of the first passivation layer. A dielectric material region and a metal material region are subjected to sequential difference double passivation treatment, and the selectivity of deposition of a film in different regions is improved and the transverse expansion of the film is controlled through a double passivation process that the dielectric material region is locked by a silicon inhibitor and the metal material region is locked by a polymer; and the region of the dielectric film on the patterned substrate is precisely limited.

The invention relates to a production method of an austenitic stainless steel composite board, a base material is carbon steel SA-533B Cl. 1, a covering material is austenitic stainless steel SA-240 304L, the thickness of the produced composite board is 40-70mm, and a process route is adopted as follows: assembling, composite blank heating, controlled rolling, quenching and tempering. The composite board produced through the method is good in shape, the binding rate is 100%, the delivery state and die welding state performance is good and uniform, the shear strength is larger than or equal to 350 MPa, the yield strength is larger than or equal to 345 MPa, the tensile strength is 550-690 MPa, the elongation A is larger than or equal to 18%, the 150-DEG C high-temperature tensile yield strength is larger than or equal to 315 MPa, the tensile strength is larger than or equal to 500 MPa, the 10-DEG C impact absorption energy is larger than or equal to 120 J, the side expansion value is larger than or equal to 1.0 mm, and the non-plastic transition (NDT) temperature is smaller than or equal to-21 DEG C; the coating austenitic stainless steel has good intergranular corrosion resistance and completely meets the technical requirements of the austenitic stainless steel composite plate for the nuclear power safety injection tank.

This invention relates to the field of three-dimensional integrated chip technology, specifically a locally passively cooled chip and its fabrication method, as well as its integration structure and method with a chip. The chip includes a first base layer, a portion of which is bonded to a diamond layer. In this invention, the diamond layer overlaps only with the logic computing region in the vertical projection. Due to the high thermal conductivity of single-crystal diamond (2200 W / (m·K), heat is diffused laterally through the diamond's high thermal conductivity, rapidly expanding local hotspots laterally, reducing local heat flux density, avoiding localized high temperatures, and lowering the hotspot temperature in the logic computing region. The storage region is covered by a second base layer made of single-crystal silicon with a thermal conductivity of 140 W / (m·K), thus hindering the lateral expansion of heat. Furthermore, a filler layer further prevents the lateral expansion of heat to the second base layer, avoiding the impact of localized high temperatures in the logic computing region, maintaining low temperatures, and preventing high temperatures from affecting the performance of the storage region.

According to the wrap angle connecting piece and the channel steel support, a first clamping groove forms three-direction constraint on a vertical rod through the wrapping type design of a base plate part and double folded edges, instability caused by opening deformation of an opening of the vertical rod of cold-bending opening C-shaped channel steel can be effectively prevented, and lateral expansion deformation of the vertical rod is effectively restrained; therefore, the risk of instability caused by local buckling of the vertical rod is remarkably reduced, the stability of the vertical rod in the using process is enhanced, the reliability and safety of the channel steel support structure are ensured, and the service life of the channel steel support is prolonged. The second clamping groove can support the supporting component and prevent the upper end face of the supporting component from being wrapped, conflict with a pipeline installation area is avoided, it is ensured that various pipeline systems can be arranged in a standardized mode according to standard requirements, the installation efficiency of the channel steel support is improved, and the pipeline installation space occupied by the right-angle connecting piece on a transverse rod of the door-shaped supporting and hanging frame is reduced. And potential safety hazards caused by the fact that the pipe clamp cannot be fixed on the cross rod channel steel can be eliminated.

This utility model belongs to the field of road engineering technology, and in particular to a composite bridge approach slab slab prevention expansion joint device. It includes a roadbed and an mounting plate installed on the surface of the roadbed. One side of the mounting plate is connected to an expansion module via a longitudinal guide strip. The surface of the expansion module is connected to one end of a contour post. A ramp plate is also connected to one side of the expansion module. The ramp plate, near the roadbed, is connected to a slider. Through the connection between the expansion module, the mounting plate, and the ramp plate, this device enables the expansion module to simultaneously perform lateral expansion and contraction and longitudinal movement. When a height difference occurs on the bridge, the expansion module can cause the ramp plate to tilt, thereby mitigating the change in height difference and forming a gentle slope to buffer vehicles. This effectively prevents slab ...

This invention belongs to the field of mining technology and discloses a method for mechanized layered mining of steeply inclined medium-thick ore bodies. Starting with the excavation of a production raise from top to bottom, a free face and ore passage are formed, and a free compensation space is created by combining lateral expansion mining. A rectangular cross-section production raise is mechanically excavated from top to bottom on the hanging wall of the ore body. A mining rock breaker is stably attached to the rock wall through fixing and support devices. Under the weakening effect of electromagnetic pulse pre-splitting, micro-fractures are induced to expand in the working face. Subsequently, the cutting disc of the mining rock breaker rotates and cuts against the working face to achieve continuous mechanical rock breaking. The crushed ore falls by gravity along the production raise into the lower transport roadway and is continuously transported to the ore pass by a belt conveyor located in the lower transport roadway. Simultaneously, lateral mining is carried out from one side of the production raise to the other side of the ore body, gradually expanding the goaf and forming a free compensation space, thereby achieving safe, stable, and continuous layered mining under non-blasting conditions.