61results about How to "Reduce excess space" patented technology

The invention discloses a tight-lock coupler intelligent tensile testing machine and a testing method thereof, and belongs to the technical field of tight-lock coupler test.The tight-lock coupler intelligent tensile testing machine comprises a mounting bottom plate and an electric control cabinet, and a support for supporting a tight-lock coupler to be detected is mounted on the surface of the mounting bottom plate; a tensile connecting frame for connecting the tight-lock coupler is mounted on the surface of the bottom plate on one side of the support, an integrated design of'tensile force detection and visual detection 'is innovatively adopted, mechanical parameter acquisition and visual deformation observation are combined, traditional mechanical data such as tensile force and displacement are obtained, and visual characteristics such as fine deformation and crack initiation are captured; precise synchronization of pulling force application, displacement collection and camera shooting is achieved through the synchronous controller, the real-time corresponding relation of pulling force-displacement-visual deformation is established, the problems that an existing device is single in detection dimension and poor in data relevance are solved, and the potential quality hazard checking capacity and the persuasion of a detection result are improved.

The invention discloses polymer-based anti-crack concrete and a preparation method thereof, and relates to the technical field of concrete. When the polymer-based anti-crack concrete is prepared, acrylic acid is grafted on the surfaces of pretreated polypropylene particles to prepare modified polypropylene particles; coating sodium metasilicate with sodium alginate to prepare a self-repairing microcapsule; the preparation method comprises the following steps: hydrolyzing 3-glycidyl ether oxypropyl trimethoxy silane, and grafting the hydrolyzed 3-glycidyl ether oxypropyl trimethoxy silane on the surface of silicon dioxide to prepare modified silicon dioxide; mixing the modified polypropylene particles, basalt fibers and polyacrylonitrile fibers to obtain a solid functional component; cement, slag powder, silica fume, an expanding agent, a solid functional component, modified silicon dioxide, a water reducing agent, an air entraining agent, deionized water, river sand, gravel and the pre-wetted self-repairing microcapsule are mixed, and the polymer-based anti-crack concrete is prepared. The polymer-based anti-crack concrete prepared by the invention has excellent anti-crack, freeze-thaw-resistant and self-repairing properties.

This invention belongs to the field of nuclear magnetic resonance technology and discloses a compact superconducting coil heat transfer structure and a liquid helium-free superconducting magnet. The compact superconducting coil heat transfer structure, applied to a liquid helium-free superconducting magnet, includes a tubular superconducting coil winding frame. A flattened superconducting coil assembly is wound around the outer surface of the superconducting coil winding frame via grooves. A heat transfer plate is provided on the outer side of the superconducting coil winding frame, and an end-face heat-conducting plate is provided at each end of the superconducting coil winding frame. Each end of the heat transfer plate is connected to the corresponding end-face heat-conducting plate, and a heat transfer metal plate is connected to both end-face heat-conducting plates. The heat transfer metal plate is in contact with the superconducting coil assembly to form a closed heat transfer loop. This invention has a compact overall structure and, through the heat transfer plates, significantly reduces the risk of excitation quench, improving the ease of use and stability of the equipment.

The utility model discloses an electronic atomization device. Belongs to the technical field of aerosol generation. In the electronic atomization device, the first circuit board is electrically connected with the second circuit board by electrically connecting the plurality of elastic pins with the elastic sheets respectively, so that the first circuit board is perpendicular to the second circuit board, the distance between the first circuit board and the second circuit board is effectively shortened, and the electronic atomization effect is improved. The first circuit board electrically connected with the elastic pieces can be tightly attached to the interior of the shell of the corresponding atomization module, so that the overall size of the atomization module is compressed, or the second circuit board electrically connected with the elastic pieces can be tightly attached to the interior of the shell of the corresponding power supply module, so that the overall size of the power supply module is compressed; and the overall size of the electronic atomization device is miniaturized by compressing the overall size of the atomization module or compressing the overall size of the power supply module, so that the packaging cost, the occupied transportation space and the transportation cost can be reduced, and a user can hold and carry the electronic atomization device conveniently.

This invention discloses an integrated refrigeration and air compression compressor unit and a refrigeration system. The integrated refrigeration and air compression compressor unit includes a refrigeration compressor, an air compressor, a motor, and a clutch. The motor has an output shaft; one end of the output shaft is connected to the refrigeration compressor or the air compressor, and the other end is connected to the air compressor or the refrigeration compressor via the clutch. In the refrigeration system, a cooling branch is provided to cool the intake air of the air compressor, reducing the exhaust temperature after compression, thereby significantly reducing the operating temperature of the air compressor, improving its reliability, and extending its lifespan. This invention has a simple structure and lower cost.

The invention relates to the technical field of battery containers, in particular to a container type control room and energy storage battery cabin combined heat management system and method.The system comprises a refrigerant loop and a secondary refrigerant loop which can conduct heat transfer, and the refrigerant loop is connected to the inner side and the outer side of a control room in series to adjust the temperature and humidity of the control room; the secondary refrigerant loop is connected with the battery cluster in the battery cabin and is used for adjusting the temperature of the battery cluster; the refrigerant loop comprises an indoor unit and an outdoor unit which are connected in series, the indoor unit is arranged in the control room, the outdoor unit is arranged outside the control room, and an outdoor unit assembly can exchange heat with the secondary refrigerant loop; the battery compartment and the control chamber are arranged in the container. The mechanism is compact, the battery cabin heat management loop and the control room heat management loop are fused, energy cross-region transfer can be achieved, and cold or heat can be flexibly distributed according to the real-time temperature control requirements of the battery and the control room.

The application discloses a GaAs-based low-capacitance high-bandwidth PIN photodiode and a preparation method thereof, and relates to the technical field of semiconductors.The PIN photodiode comprises a GaAs substrate, a deformation growth layer and an InP-based PIN functional layer.The deformation growth layer is used for realizing the lattice constant transition from the GaAs substrate to the InP-based PIN functional layer.The InP-based PIN functional layer comprises an n-type contact layer, a first intrinsic layer, an intrinsic absorption layer and a window layer, and the first intrinsic layer is provided with an ion implantation modification area, which is used for forming a high-resistance area to reduce the effective electrical junction area of the device.The application realizes the heterogeneous integration of the GaAs substrate and the InP-based PIN functional layer through the deformation growth layer, significantly reduces the device cost, realizes the physical decoupling of the photosensitive area and the electrical junction area through the ion implantation modification area, and significantly reduces the intrinsic junction capacitance while maintaining a large optical aperture, thereby systematically solving the inherent contradiction among the bandwidth, the responsivity and the cost in a high-speed PIN-PD.

The present application relates to the technical field of intelligent manufacturing and intelligent scheduling, and particularly relates to a flexible processing unit dynamic regulation method, system and model based on multiple agents. The method comprises the following steps: S1: establishing an event-driven Markov decision process model; S2: constructing corresponding task selection agents and workpiece selection agents to form a hierarchical multi-agent deep reinforcement learning architecture; S3: designing the system state features, action space and reward function of the task selection agents and the workpiece selection agents; S4: jointly training the task selection agents and the workpiece selection agents based on a multi-agent proximal policy optimization training algorithm to obtain optimal policy parameters of the task selection agents and the workpiece selection agents; and S5: the task selection agents and the workpiece selection agents output task actions and workpiece actions respectively based on the optimal policy parameters obtained through training. The present application can improve the adaptability of the system to dynamic disturbances and the real-time decision-making capability.

This invention discloses a lensless fiber bundle phase imaging method. The method includes: acquiring a single-exposure image of a sample through an optical fiber under multi-wavelength illumination; obtaining light intensity data for reconstruction by multi-channel separation and correction of the image; reconstructing the diffraction image of the sample based on the obtained light intensity data by removing the fiber bundle structure; establishing a lensless fiber bundle imaging model and correlating the diffraction image with the complex amplitude distribution of the sample; constructing an objective function for optimization and solving to obtain the amplitude image and phase image of the sample. This invention eliminates the need for lenses in the fiber bundle, offering advantages such as simple structure and suitability for miniaturized systems, and enables stable quantitative phase imaging under single exposure.

The application relates to the technical field of acrylic plate production, and discloses a material uniformizing device for acrylic plate production, which comprises a base plate, two collecting assemblies for collecting excess acrylic raw materials are arranged above the base plate, two extruding wheels for extruding and forming into acrylic sheets are arranged between the two collecting assemblies, a raw material heating box for heating the raw materials into plastic fluid is arranged above the two extruding wheels; one side of each of the two extruding wheels close to the fixed plate I is rotationally connected to the fixed plate I, and the other side of each of the two extruding wheels away from the fixed plate I is rotationally connected to the fixed frame, so that the positions of the two extruding wheels correspond to each other and remain unchanged, the extruding force is balanced, the acrylic plate is more uniformly formed, the thickness of the uniform acrylic plate can be reduced, the bending stiffness and hardness of the acrylic plate are increased, the strength and durability of the acrylic plate are improved, the structure weight and transportation cost of the uniform and light acrylic plate are reduced, and the service life of the acrylic plate is increased.

The utility model discloses a kind of planetary semi-direct drive structures for scraper, including permanent magnet motor, speed reducer and chain tensioning mechanism, the output end's spline shaft of the permanent magnet motor inserts the input hole of the speed reducer, is connected with one level sun gear by the stop mouth cooperation spline, the one level sun gear is fixedly connected with large gear, the large gear is engaged with the chain tensioning gear in the chain tensioning mechanism and is connected, the one level sun gear is connected with two level sun gear by spline, the two level sun gear is driven and connected with two level planetary gear, compared with the utility model discloses the space occupation reduction of split structure, transmission chain shortens, noise reduction, water cooling path system and chain tensioning function are built-in, improve reliability.

The invention relates to a composite foil manufacturing system and application thereof.The composite foil manufacturing system comprises an unwinding system which is of a winding and unwinding integrated structure and is used for unwinding a multi-layer composite material which comprises a functional base material, and at least one side surface of the multi-layer composite material comprises an adhesive layer and a release film; the foil generating system comprises a cathode roller and is at least used for generating a foil layer; the compounding system is used for compounding the functional base material, the adhesive layer and the foil layer to prepare a composite foil intermediate; the composite foil passing rollers are at least used for conveying; the passivation system comprises a first passivation device containing a first passivation solution, and is used for performing first passivation treatment on the composite foil intermediate, and during the first passivation treatment, the single-side foil layer is used as a liquid layer to be in contact with the first passivation solution, or is further used as an isolating layer to isolate the first passivation solution from the adhesive layer and the release film on the back side; and the winding system is at least used for winding the composite foil. The system is low in equipment cost, small in occupied area, capable of achieving integration of foil generation and compounding and improving the oxidation resistance of the composite foil, and wide in application prospect.

The utility model provides a battery cell group module and a battery pack, the battery cell group module comprises a plurality of battery cell stacking bodies, the plurality of battery cell stacking bodies are arranged along a first direction, and each battery cell stacking body comprises a plurality of battery cells stacked along a second direction; the connecting assembly comprises at least one connecting beam and at least two groups of connecting belts, the connecting beams are arranged between every two adjacent battery cell stacking bodies, and the connecting belts are arranged at the two ends, distributed in the first direction, of a whole formed by the multiple battery cell stacking bodies; and the two side plate groups are positioned on the two sides, distributed in the second direction, of the battery cell stacking body, and the two side plate groups are connected through a connecting assembly and clamp and fix the battery cell stacking body. According to the battery cell group module and the battery pack provided by the invention, the connecting beams located at the two ends of the plurality of battery cell stacking bodies in the first direction are replaced by the connecting belts, so that the number of the connecting beams in the battery cell group module is reduced, and the material cost, the weight and the occupied space of the battery cell group module can be effectively reduced.

The application relates to a cold-storage type liquid cooling air conditioner comprehensive guarantee equipment, which comprises a refrigeration and cold storage system, a refrigeration mechanism and a cold storage mechanism, the cold storage mechanism is provided with cold storage materials, the cold storage materials are heat-exchanged and refrigerated with the refrigeration mechanism through a heat exchanger; an air supply system is suitable for outputting cold air for an aircraft, the air supply system is heat-exchanged and cooled with the cold storage materials through the heat exchanger, and the air in the air supply system is heat-exchanged and cooled; a liquid supply system is suitable for outputting cooling liquid for the aircraft, the application has the advantages that one equipment can adapt to the air conditioner air supply of the aircraft and the liquid cooling ground guarantee needs, one machine has multiple uses, the guarantee equipment quantity is reduced, the required operators are reduced, the use is more convenient, the comprehensive guarantee efficiency is improved, meanwhile, the air supply system and the liquid supply system use the same refrigeration and cold storage system, so that the redundant space and the redundant design of the equipment are reduced, and the application of the cold storage reduces the power consumption of the whole machine.

The utility model discloses a novel difunctional gas-liquid coalescer which comprises a lower shell, an upper shell is arranged at the top end of the lower shell, and a partition plate is fixedly arranged at the bottom of the inner side of the upper shell. The pre-filter is further limited and fixed through limiting and clamping of the multiple limiting elastic pieces and the multiple limiting grooves, so that the pre-filter and the coalescence element are designed in the same shell, the manufacturing cost and the field occupied space are reduced, the gas-liquid separation effect is obviously improved, and the gas-liquid separation efficiency is improved. The separation efficiency of 0.1 micron liquid can reach 99.95% or above, meanwhile, the operation pressure difference of the prefilter can be reduced, the prefilter is pulled through large force, a plurality of limiting elastic pieces are separated from a plurality of limiting grooves, the prefilter is not limited any more, and then the prefilter can be rapidly disassembled and maintained conveniently.

The present application relates to the technical field of image reconstruction, in particular to a kind of imaging method of 3D space position information and 2D color texture information fusion, comprising the following steps: according to 2D color texture information, extract 2D color texture information internal gray level co-occurrence matrix pixel parameter, generate two-dimensional color mutation boundary, obtain 3D space position information accompanying space isomorphism determination item.In the present application, three-dimensional feature distribution skeleton coordinate set is used to participate in the solution of curved surface control point, so that the spatial curved surface reconstruction has continuity and geometric consistency;Finally, by converting two-dimensional color mutation boundary coordinates into Lagrange multiplier constraint variable and embedding into the solving process, the boundary constraint directly participates in the three-dimensional curved surface generation process, and then the texture pixel value is mapped to the external connection surface of three-dimensional curved surface grid node set, to realize the synchronous expression of space structure and texture information.

The utility model discloses a multi -directional force measuring support of stepless regulation height, including upper portion structure, upper portion structure includes the upper support plate, middle seat board, lower support plate and base plate that set gradually from top to bottom, be provided with the spherical cap lining board between the upper support plate and the middle seat board, the bottom surface of upper support plate and the top surface of middle seat board correspond to concave spherical surface, the upper and lower surface of spherical cap lining board are spherical surface, the upper end surface of spherical cap lining board and the bottom of upper support plate form first sliding friction pair, the lower portion of middle seat board is provided with lower support plate, the lower portion of lower support plate is equipped with base plate, and form the pelvic cavity between lower support plate and base plate.

The invention discloses a battery module and energy storage equipment. The battery module comprises a plurality of battery cell components, a first conductive part and a second conductive part, each battery cell assembly comprises a plurality of battery cells arranged along a first direction, the plurality of battery cell assemblies are arranged along a second direction, the adjacent battery cell assemblies are connected, and the first direction is perpendicular to the second direction. The first conductive member is connected to the at least one battery cell. And the second conductive piece and the first conductive piece are connected with the battery cell of the same battery cell assembly. The second conductive part is connected to at least one battery cell, the polarity of the first conductive part is opposite to that of the second conductive part, and the first conductive part and the second conductive part are configured to input and / or output electric energy for the multiple battery cell assemblies. And along the direction opposite to the second direction, the first conductive piece and the second conductive piece are positioned on the same side of the plurality of battery cell components. And along the first direction, the battery cell connected to the second conductive piece and the battery cell connected to the first conductive piece are adjacently arranged.

The invention discloses a tilling width and tilling depth coordinated regulation type turnover plow which comprises a suspension assembly, a main beam, a tilling width adjusting mechanism, a tilling depth adjusting mechanism and a plurality of plow body overload protection rapid reset single bodies, and the main beam is connected with the suspension assembly through the tilling width adjusting mechanism; the tilling depth adjusting mechanism is mounted on the main beam; the multiple plough body overload protection rapid reset single bodies are installed on the plough width adjusting mechanism and arranged at intervals. According to the invention, the real-time cooperative adjustment of the tilling width and the tilling depth is realized, and the operation quality, the operation adaptability and the operation efficiency are improved.

The invention provides an analog quantity current input module, a current acquisition method and a programmable logic controller, and the analog quantity current input module comprises a signal acquisition end which is provided with a plurality of mutually independent signal acquisition channels, each signal acquisition channel comprises a front-end signal conditioning circuit, an analog-to-digital conversion chip and a digital isolator with an isolated power supply signal; the front-end signal conditioning circuit converts an input current signal into a voltage signal, performs resistance-capacitance filtering and common-mode rejection on the voltage signal, and then raises the voltage range of the voltage signal to the central region of the measuring range of the analog-to-digital converter; the analog-to-digital converter collects an output signal of the front-end signal conditioning circuit for sampling to obtain a sampling signal; and the signal processing end is communicated with the analog-to-digital converter through the digital isolator so as to receive the sampling signal and process the sampling signal. According to the invention, the board occupation area can be effectively reduced and the circuit structure is simplified.

The invention provides a remote sensing data scheduling method and device based on a space grid, and relates to the technical field of remote sensing image processing. The method comprises the following steps: establishing a mapping index of remote sensing data and grid codes by constructing a multi-specification space grid coding system; after a user request containing parameters such as a space range and a time range is received, a target grid code is positioned; grid-level byte segmentation reading is realized based on file pointer offset, and real-time processing is completed in a memory; and finally, outputting in a standard WMTS / WMS format. The device comprises a grid management module, a scheduling engine module, a real-time processing module and a service publishing module. According to the scheme, preprocessing is not needed, the data scheduling efficiency is improved, multi-temporal data unified service and dynamic inlaying are supported, the problems that traditional remote sensing data service is large in resource consumption, and multi-temporal calling is difficult are solved, and the real-time service requirement of mass data is met.

The invention discloses an assembly type frame structure beam column connecting structure, relates to the field of assembly type frame structures, and aims to solve the problem that the efficiency is low in the prefabrication manufacturing and transportation process of traditional prefabricated beams and columns, the technical scheme is characterized in that the assembly type frame structure beam column connecting structure comprises a column body and a column cap, and the column cap covers the end face of the column body; the column cap comprises a placing block arranged in the X-axis direction of the top face of the column body, the two ends, in the X-axis direction of the top face of the column body, of the placing block extend out of the top face of the column body, the two sides, in the Y-axis direction of the top face of the column body, of the placing block are flush with the two sides, in the Y-axis direction, of the top face of the column body, and supporting frames for supporting beam ends are arranged on the two sides, in the Y-axis direction, of the placing block. The effect of improving the manufacturing and transporting efficiency of the prefabricated beams and columns is achieved.

The utility model relates to the technical field of self-service equipment, in particular to a self-service check-in terminal which comprises a cabinet, and the cabinet comprises a display portion, an expansion portion and an equipment portion used for installing a control host. The display part, the expansion part and the equipment part are in smooth transition; an expansion mounting plate is detachably mounted on the front end face of the expansion part, a number taking printer and an information reading assembly are mounted on the expansion mounting plate, and a wireless communication module is mounted at the rear end of the expansion part; the number taking printer, the information reading assembly and the wireless communication module are all in signal connection with the control host. According to the self-service check-in terminal, the identity information of a user is protected while the operation experience of the user is improved, and the risk that important articles are left behind is reduced; the design of the detachable expansion part is adopted, so that the adaptability and the expansibility of the terminal to various types of scenes are improved; a number taking printer and an information reading assembly are arranged, identity information is rapidly obtained, paper registered bills are shown, the registration process is integrally simplified, and the registration efficiency is improved.

The application discloses a wind power daily scene generation method based on a tensor self-organizing mapping neural network, and comprises the following steps: obtaining a daily scene data set of multiple wind farms; clustering the daily scene data set by using a tensor self-organizing mapping neural network; constructing a variational autoencoder for each cluster respectively to extract hidden features from the daily scene data; performing random simulation and sampling on the daily scene data of each cluster by using the hidden features to obtain a daily scene hidden variable data set; decoding and reconstructing the daily scene hidden variable data set to obtain reconstructed daily scene data of each cluster; and aggregating the reconstructed daily scene data of each cluster to obtain a reconstructed daily scene data set. After clustering the daily scene samples, the application respectively reduces the dimension and reconstructs the samples of each cluster, improves the accuracy of the reconstructed daily scene data, significantly reduces the spatial and temporal correlation error of the reconstruction by considering the time and space correlation of the scene data, and strengthens the feature expression ability of the generated scene.

The invention discloses a multi-agent real-time optimal power flow optimization method of a fusion graph neural network. The method comprises the steps that a power grid topological graph of a power system, equipment parameters of all power equipment, bus parameters of all buses and line parameters of all transmission lines are obtained, and each bus and the power equipment connected with the bus form a power grid node; inputting the data into a graph neural network model for spatial feature extraction, and generating a plurality of node embedding vectors representing node connection relationships and own features; dividing all the node embedding vectors into a plurality of node vector sets, wherein each vector set corresponds to a group of power equipment in the same area; and inputting each node vector set into different agents based on reinforcement learning training, and accurately outputting a control instruction of the corresponding power equipment by an instruction generation model in each agent, so as to realize power flow optimization control of the power system based on artificial intelligence, and significantly improve the control efficiency of the power system.

This utility model provides a foldable mailbox, including a back panel assembly, a first side panel, a second side panel, a door panel, a top panel, and a bottom panel. By designing the back panel assembly and using first and second upright panels with different extension lengths, it facilitates the connection between the bottom panel, the first side panel, and the second side panel and the back panel assembly for storage. This creates storage space for the bottom panel and the first side panel, optimizing the space occupied by the mailbox in the folded state and avoiding the inconvenience of disassembly and reassembly caused by disassembling and repackaging all panels of conventional detachable mailboxes. This mailbox is convenient for transportation when folded and easy to unfold and install upon arrival at its destination.

The utility model discloses an electric loader cooling system and electric loader, electric loader cooling system includes: radiator, cooling pump, the entrance of cooling pump is connected the cooling liquid export of radiator, a plurality of groups of cooling pipeline, the one end of each group cooling pipeline is connected the export of cooling pump, the other end of each group cooling pipeline is connected the confluence pipeline after along the set route through the working device of waiting for cooling, the confluence pipeline is connected the cooling liquid import of radiator. The utility model integrates one body to multiple electric cylinders and its electric control heat dissipation, has reduced the quantity of independent heat dissipation unit, has reduced space occupancy and installation complexity, has improved the heat dissipation efficiency, has saved whole car installation space simultaneously, and the production, manufacturing cost is low.

The utility model relates to the technical field of current transmitters, in particular to an open-close type passive alternating current transmitter. The open-close type passive alternating current transmitter comprises a transmitter body, a matching cover is rotatably arranged on the top of the transmitter body, a first groove body is formed in the top of the transmitter body in the length direction, a second groove body is correspondingly formed in the bottom of the matching cover, a first iron core with an opening in one end is arranged at the transmitter body, and a second iron core with an opening in one end is correspondingly arranged at the matching cover. When the matching cover covers the top of the transmitter main body, the opening end of the first iron core is correspondingly matched with the opening end of the second iron core, the first iron core is sleeved with a coil, the bottom of the coil is provided with a circuit board, and the circuit board is electrically connected with the coil. Self-induction power supply is realized through a closed magnetic circuit structure generated by the first iron core and the second iron core, so that an external power supply is completely not needed, and the power supply deployment cost and the operation and maintenance complexity are reduced.

The invention discloses a visual system-based industrial robot for product appearance detection, which comprises a sorting structure, a driving structure is fixedly arranged on the sorting structure, a pair of swinging structures is symmetrically arranged on the driving structure, picking structures are respectively arranged on the pair of swinging structures, and the picking structures can be oppositely attached and butted. The invention relates to the technical field of detection equipment, and has the advantages of simple structural design, high transmission efficiency, convenient maintenance, strong action linkage synchronism, no redundancy in process connection, efficient double-sided detection, realization of synchronous detection, controllable precision, assembly line continuous operation, adaptation to mass production requirements, detection and sorting integration, and high efficiency. The sorting is accurate, the main process is not interfered, the action adaptability is high, the application scene is wider, the operation automation degree is high, and manual intervention is reduced.

The application relates to a prefabricated stair installation structure, which comprises a lower stair platform, an upper stair platform and a stair body, the stair body comprises a first stair and a second stair, one end of the first stair is connected to the lower stair platform, and one end of the second stair is connected to the upper stair platform; the lower stair platform and the upper stair platform are each provided with an anchoring piece; a supporting assembly is arranged between the lower stair platform and the upper stair platform, and the supporting assembly is used for supporting the first stair and the second stair. The prefabricated stair installation structure can improve the installation convenience of the stair body in a narrow stairwell. The application also relates to a prefabricated stair installation method.