34results about How to "Strong and stable structure" patented technology

The invention discloses an oxidized crosslinked asphalt coated resin hard carbon negative electrode material and a preparation method thereof. The preparation method comprises the following steps: S1, pre-treating resin to obtain a resin precursor; s2, performing mechanical pulverization, low-temperature pre-carbonization and airflow pulverization treatment on the resin precursor to obtain low-temperature pre-carbonized ground powder; s3, the low-temperature pre-carbonized ground powder is subjected to activation pore forming and high-temperature carbonization treatment, and resin hard carbon is obtained; s4, uniformly mixing the resin hard carbon and the asphalt to obtain a mixture; s5, performing asphalt melting coating and low-temperature oxidation cross-linking treatment on the mixture to obtain oxidation cross-linked asphalt coated resin hard carbon; s6, performing high-temperature carbonization treatment on the oxidized cross-linked asphalt coated resin hard carbon to obtain coated hard carbon; and S7, carrying out post-treatment on the coated hard carbon to obtain the oxidized crosslinked asphalt coated resin hard carbon negative electrode material. The oxidized cross-linked asphalt coated resin hard carbon negative electrode material has a relatively low specific surface area, and the first reversible capacity and the initial coulombic efficiency of a battery can be remarkably improved.

The invention belongs to the technical field of sulfur recovery, and particularly relates to an organic sulfur hydrolysis synergistic sulfur recovery catalyst as well as a preparation method and application thereof. Comprising the following steps: (1) dissolving strontium salt; (2) adding transition metal salt; (3) adding a titanium source; (4) adding an alkali metal compound; (5) stirring reaction; (6) hydro-thermal treatment; and (7) centrifuging, washing, drying and roasting. The general formula of the prepared catalyst is SrTi (1-x) MxO3, in the formula, x is equal to 0.05-0.2, and M is a transition metal element. The prepared catalyst is high in material composition and structure adjustability, rich in surface acid-base sites, excellent in organic sulfur hydrolysis reaction activity and H2S selective oxidation activity, and capable of realizing efficient and synergistic proceeding of organic sulfur hydrolysis and H2S selective oxidation and removing sulfur-containing components in process gas in one step.

The utility model relates to the technical field of municipal construction accessories discloses a protection device for pipeline construction anti -collision, including longitudinal steel pipe, circular arc steel pipe, multidirectional pulley, anti -collision steel strip and oblique steel pipe, the longitudinal steel pipe has many, many longitudinal steel pipes are parallel to the length direction of pipeline, at least two longitudinal steel pipes are opposite other and are located downside, and its bottom is provided with multidirectional pulley, at least one longitudinal steel pipe is opposite other and is located upside, and it connects two longitudinal steel pipes with pulley through oblique steel pipe, two longitudinal steel pipes with pulley are connected through circular arc steel pipe between, the longitudinal steel pipe or oblique steel pipe stretches out anti -collision steel strip outward, the utility model aims at providing more effective, reliable and economic and practical anti -collision solution for pipeline construction.

The utility model discloses a cooling device for a converter flue oxygen lance opening, which belongs to the technical field of converter equipment and comprises a shell, a plurality of water inlet runners and a plurality of water outlet runners. A water inlet header and a water outlet header are annularly arranged on the periphery of the shell, and a communicating box is annularly arranged at the inclined opening end of the shell. The multiple water inlet flow channels are arranged in the circumferential direction of the shell and located in the side, close to the inner wall, of the shell. The multiple water outlet flow channels are arranged in the circumferential direction of the shell and located in the side, close to the outer wall, of the shell. As the water inlet runner, the water outlet runner and the shell are formed by integral casting, the oxygen lance opening has few structural weak parts, and the oxygen lance opening is strong in integral structure and is not easily damaged by external impact. The water inlet runner and the water outlet runner are separated in the inner wall and the outer wall of the shell respectively, so that the overall cooling uniformity of the oxygen lance opening is high, a heat concentration area is avoided, the structure of the oxygen lance opening is effectively protected, the service life of the oxygen lance opening is remarkably prolonged, and the maintenance rate is reduced.

The utility model discloses a kind of turnover strip-shaped concrete reverse ridge template fixing devices, belong to building construction equipment technical field, including handle, the handle below is provided with connecting sleeve, the connecting sleeve both sides are connected with one root horizontal support rod respectively, connecting sleeve with The horizontal support rod is connected through thread between the two, the horizontal support rod is connected with two oblique support rods away from connecting sleeve end, and the oblique support rod between same side is connected with longitudinal support rod.The utility model uses above-mentioned one kind of turnover strip-shaped concrete reverse ridge template fixing device, by the welding assembly of several support rods, cooperate sleeve and handle, the convenient material taking and quick production of fixed device production are realized, improve work efficiency, save construction cost.

The present invention provides a conveyor belt device with a cooling function, comprising a main frame and a sub-frame, the rear end of the sub-frame is hingedly assembled with the main frame through a first hinge shaft, the two ends of the main frame are equipped with a first driving gear and a first driven gear through bearings, the upper ends of the legs of the main frame are equipped with a first limiting gear and a second limiting gear through bearings, the first driving gear, the first driven gear, the first limiting gear and the second limiting gear are equipped with a first conveyor belt body, and the two ends of the sub-frame are provided with a second driving gear and a second driven gear. The present invention is provided with six groups of different structures, but the functions are the same, which are structures that facilitate material heat dissipation and cooling, have strong structural innovation and practicality, greatly improve the cooling effect of the material without affecting the material transmission efficiency, and are different from the existing conveyor belt devices with cooling function to a large extent.

The invention discloses a self-propelled conveyor and a chassis thereof. The chassis comprises a frame and two crawler devices, the frame is a multi-span frame and is provided with a lower-layer space for mounting a hydraulic system and an upper-layer space for mounting an electrical system; the two crawler belt devices are respectively arranged on the left side and the right side of the frame and drive the frame to walk and move. The chassis is designed to be composed of the frame and the two crawler belt devices and is matched with the frame to be a multi-span type frame, so that the installation height of the platform is effectively reduced to 800 mm from original 1200 mm and is reduced by 33%, the gravity center of the whole mechanism is obviously reduced, and the overall walking stability is greatly improved by reducing the gravity center of a conveyor which is a machine with the high gravity center. Compared with the prior art, the crawler trolley has the advantages that large shaking is avoided during walking, normal running is facilitated, meanwhile, a slewing bearing and a slewing platform are omitted, a mounting seat for mounting the slewing bearing on the crawler trolley is omitted, and the manufacturing cost is greatly reduced.

The utility model relates to the technical field of forging equipment, and provides a cone roller split mechanism and a ring rolling mill, the cone roller split mechanism comprises a rack, a rotating shaft, a connecting rod, a cone roller, a hydraulic nut and a fastener, the connecting rod penetrates through the rotating shaft; the conical roller and the hydraulic nut are oppositely arranged at the two ends of the connecting rod and are connected in a threaded screwing mode. The fastener is arranged on the hydraulic nut and used for limiting the stroke of the hydraulic nut. The conical roller and the hydraulic nut are arranged at the two ends of the connecting rod, so that the conical roller can be tensioned through the connecting rod by pressurizing the hydraulic nut, and the conical roller and the rotating shaft are fixed; meanwhile, the connecting rod is connected with the conical roller in a screwed mode through threads, the hydraulic nut serves as a pressurizing piece, the conical roller can be loosened after pressure relief, and therefore the conical roller can be disassembled conveniently, and the structure is simple; and the hydraulic nut of the structure is located on the outer side, overhauling and maintenance can be continued conveniently, and application convenience can be improved.

The invention discloses a preparation method and application of a cationic polyurethane / carboxyl carbon nanotube conductive composite foam, comprising the following steps: (1) preparing a cationic polyurethane; (2) mixing a cationic polyurethane and an inorganic salt by an organic solvent, drying to obtain a cationic polyurethane / inorganic salt composite elastomer, removing the inorganic salt by soaking in hot water to obtain a cationic polyurethane foam, and soaking the cationic polyurethane foam in an aqueous solution of carboxyl carbon nanotubes for a period of time, washing and drying to obtain a conductive composite foam. The cationic polyurethane of the invention comprises a hard segment structure having a cationic group and a soft segment structure with a strong polarity. By introducing a cationic group into the main chain structure of the hard segment, an electrostatic interaction is formed between the carboxyl carbon nanotubes, thereby promoting the binding ability between the nanofiller and the polyurethane foam. The porous structure of the foam improves the sensitivity of the assembled sensor within a small strain range, and is expected to be applied to the field of human motion detection.

The utility model discloses a left and right horizontal horizontal type hinged folding device, the left side support's front and back wall respectively correspond the left end of left front horizontal hinged piece, left rear horizontal hinged piece of hinged connection, and left front horizontal hinged piece, left rear horizontal hinged piece can only be relative to left side support front and back horizontal swing hinged, the right side support's front and back wall respectively hinged connection has the right end of right front horizontal hinged piece, right rear horizontal hinged piece, and right front horizontal hinged piece, right rear horizontal hinged piece can only be relative to right side support front and back horizontal swing hinged, the right end of left front horizontal hinged piece, left rear horizontal hinged piece is swing hinged with the left front end, left rear end of corresponding intermediate X shape horizontal hinged frame, and the left end of right front horizontal hinged piece, right rear horizontal hinged piece is swing hinged with the right front end, right rear end of corresponding intermediate X shape horizontal hinged frame, this product can left and right horizontal stretch and horizontal contract folding, and the good bearing capacity is stable in structure, and the structure is solid, and convenient operation.

This invention relates to the field of solid-state lithium metal battery technology, specifically to a lithium deposition redirection hybrid conductor layer, its preparation method, and a lithium metal battery. The hybrid conductor layer is disposed between a sulfide solid electrolyte layer and a negative electrode current collector, comprising an oxidized carbon-based conductive framework and an alloyed deposition acceptor component formed in situ by coordination and anchoring of oxygen-containing functional groups on the surface of the oxidized carbon-based conductive framework. The hybrid conductor layer forms an electron-damping lithium-ion exchange region near the sulfide solid electrolyte layer and an alloyed deposition acceptor region near the negative electrode current collector, allowing lithium metal to preferentially deposit on the side near the negative electrode current collector during charging. This reduces the risk of side dendrite growth, micro-short circuits, and physically irreversible lithium generation in the sulfide solid electrolyte, thereby improving the coulombic efficiency and cycle stability of the solid-state lithium metal battery.

The invention relates to the technical field of switchboards, in particular to a drawing return type switchboard structure which comprises a switchboard main cabinet and an external rack arranged on the side edge of the switchboard main cabinet. A switchboard carrying table is arranged on the carrying surface of the switchboard main cabinet, the switchboard carrying table is provided with a drawing part, the switchboard carrying table is further provided with a load circuit breaking piece and a load connecting piece, the drawing part is installed on the switchboard carrying table in a sliding mode, and the electric contact end of the load circuit breaking piece and the electric contact end of the load connecting piece are both in butt joint with an electric contact panel of the drawing part; the carrying surface of the distribution board main cabinet is also provided with an electric device installation frame, the electric device installation frame is provided with an electric device butt joint carrier, and the electric device butt joint carrier is slidably installed on the electric device installation frame and is in butt joint with the electric contact panel of the drawing part. According to the invention, flexible configuration of circuit connection is realized, so that the switchboard can adapt to various different electrical layout requirements.

According to the composite steel wire rope for mine hoisting and the manufacturing method of the composite steel wire rope, the center strand is made of the aramid fibers, meanwhile, the rope core strand formed by twisting the filaments formed by melting and drawing various high-strength fibers is twisted outside the center strand, and the strength and the tensile property of the composite rope core are greatly improved; and the high-toughness corrosion-resistant steel wire rope has good toughness and corrosion resistance, and is suitable for mine environments and high-load applications thereof. Meanwhile, a graphite fluoride coating is arranged outside the inner-layer strand, and a polytetrafluoroethylene coating is arranged outside the outer-layer strand, so that the friction among the inner-layer strand, the outer-layer strand, the filling strand and the special-shaped steel wires during use can be reduced, and the inner-layer strand and the outer-layer strand have excellent corrosion resistance; the inner-layer strands and the outer-layer strands can keep good performance in a severe environment; in addition, through filling of the filling strands and the special-shaped steel wires, the compactness of the steel wire rope is increased, the whole structure of the steel wire rope is firmer, tighter and more pressure-resistant, and the mechanical property of the steel wire rope is improved.

A structure for installing a suspension rod with adjustable length includes a suspension rod body, the suspension rod body includes a fixed-length tube, a snap assembly and an adjustment sleeve, the fixed-length tube is integrally formed with a first chamber and a second chamber that are close to each other, a mounting through hole is provided on the side wall of at least one end of the first chamber, a snap assembly is provided in the mounting through hole, at least one end of the fixed-length tube is sleeved with an adjustment sleeve, the adjustment sleeve is integrally formed with a first sleeve and a second sleeve that are interconnected, the first sleeve and the second sleeve are matched with the first chamber and the second chamber respectively, a plurality of telescopic positioning holes that match the snap assembly are provided on the side wall of the first sleeve, and a threading hole is provided at the end of the second sleeve away from the fixed-length tube. The present invention designs the suspension rod body as a double-chamber structure, one chamber cooperates with the snap to adjust the size, and the other chamber can pass through the wire to ensure that the wire is in the chamber, which can slow down the aging of the wire; the suspension rod body adopts a snap structure, so that the length of the suspension rod can be accurately adjusted.

The invention discloses a width-variable guide rail falling protector easy to disassemble and assemble. The guide rail falling protector is mainly applied to the field of high-altitude operation safety protection. Comprising a movable shell and a fixed shell which move relatively to change the width of the falling protector. The hanging handle is used for connecting external safety equipment; the fixed long shaft penetrates through the fixed shell, one end of the fixed long shaft extends out of a limiting area with a blocking step, and the movable shell penetrates through the limiting area. The sliding limiting device is installed in a groove of the fixed shell, switching between the working state and the non-working state of the falling protector and width adjustment are achieved, and the falling protector can be flexibly disassembled and rapidly installed in the middle of the guide rail. The falling protector is convenient and efficient to operate, and the operation procedures of installation, locking, unlocking and the like are simplified; the problem of midway disassembly of a traditional safety lock guide rail is solved; the structure is stable and durable and adapts to complex environments; the comprehensive cost and risk of high-altitude operation are effectively reduced, high-quality and comprehensive safety protection is provided for high-altitude operation personnel, and development of the high-altitude operation safety technology is promoted.

The utility model relates to laser cladding technical field, proposed light is in the coaxial powder feeding's laser cladding high accuracy closed -loop focusing device, including the cover head casing, the inside fixed connection of cover head casing has two parallelly arranged linear guide rails, the sliding connection of two linear guide rails has the sliding block, the bottom of sliding block is provided with the lens mount, the fixed plate on the bottom of sliding block is fixedly connected in lens mount, the inside of lens mount is provided with zoom lens group, the bottom of cover head casing is provided with the laser channel of the concentric setting with zoom lens group, the outside of cover head casing is provided with four powder feeding channels, four powder feeding channels surround laser channel and angle distribution, one end of lens mount is provided with the drive module for drive lens mount vertical activity. The utility model discloses through the transmission combination of ''stepping motor + ball screw + linear guide rail '' and laser displacement sensor closed loop feedback, positioning accuracy greatly promotes.

This application discloses a blade assembly, a blending cup, and a blender. The blade assembly includes a blade shaft and a blade. The blade includes a blade root and a first blade wing. The blade root is connected to the blade shaft, and the first blade wing is connected to the side of the blade root away from the blade shaft and rotates with the blade shaft. The first blade wing has a cutting edge. The cutting edge profile includes a first segment near or connected to the blade root and a second segment near or connected to the free end of the first blade wing. The curvature of the second segment is greater than that of the first segment. The blade assembly of this application can improve the blender's ability to process different ingredients, meeting users' needs for processing various ingredients.

The utility model discloses fuming cupboard equipment based on safety production, which relates to the technical field of fuming cupboards, comprises a fuming cupboard main body, and is characterized in that a first bracket, a second bracket and an electromagnet are arranged on two sides of the fuming cupboard main body, and a limiting frame is connected between the first bracket and the second bracket through a damping rotating shaft; the back of the limiting frame is connected with rollers, and the side face of the limiting frame is provided with an elastic piece and an adsorption plate. Through the arrangement of the first support, the second support, the limiting frame and the elastic piece, after the lifting window is completely lifted, the elastic piece drives the limiting frame to rotate, so that the limiting frame moves to the bottom of the lifting window, and when the lifting window falls by a small distance, the lifting window can fall on the limiting frame; compared with friction braking, abrasion has no influence on the limiting effect, compared with ratchet wheel locking, impact force is small, the structure is thick and strong and not prone to breakage, and compared with electromagnetic locking, continuous electrification is not needed, and energy conservation and environment protection are achieved.

The present invention belongs to the field of catalytic technology, and specifically relates to a slurry bed methane synthesis catalyst and a preparation method and application thereof. The slurry bed methane synthesis catalyst of the present invention comprises a modified silica carrier and an active component supported on the modified silica carrier; wherein the specific surface area of ​​the modified silica carrier is 270-340 m 2 / g, average pore diameter of 60-130nm, pore volume of 0.6-1cm 3 / g. The slurry bed methane synthesis catalyst prepared by the present invention has high stability under gas-liquid-solid three-phase conditions, and the active component and the carrier have high binding degree and good structure-activity relationship. The preparation method of the slurry bed methane synthesis catalyst of the present invention is simple, has good reproducibility, and is easy to promote industrialization.

The anti-skid high-elasticity plastic floor comprises a wear-resisting layer, a stable layer, a foaming layer and a bottom layer which are attached to one another through a multi-time gluing technology, the wear-resisting layer is arranged on the uppermost layer, anti-skid lines are arranged on the upper surface of the wear-resisting layer, the stable layer is arranged below the wear-resisting layer and divided into an upper stable layer and a lower stable layer, glass fabric is embedded in the upper stable layer, and the foaming layer is arranged on the lower stable layer. Coarse cloth grids are embedded in the lower stable layer, the foaming layer is arranged below the stable layer, the bottom layer is arranged below the foaming layer, and shading is arranged on the bottom surface of the bottom layer. The high-elasticity elastic shoe sole is firmer, more stable, better in rebound resilience and longer in service life.

The present invention relates to a motor pump. The motor pump (MP) includes a first impeller (1A), and a second impeller (1B) connected to a communication shaft (270). A boss portion (281) of the first impeller (1A) has a larger size than that of the boss portion (282) of the second impeller (1B).

This application discloses an adaptive obstacle detection method and apparatus for adverse weather conditions, relating to the field of autonomous driving technology. The method acquires multi-source sensor data from an onboard vehicle, combines it with pre-calibrated sensor parameters to generate spatiotemporally aligned multi-source sensor data, extracts features to obtain feature maps for each modality, and projects all feature maps onto a bird's-eye view BEV space of the same resolution, using the LiDAR coordinate system as a reference, outputting a multi-modal BEV feature set. The feature set is concatenated along channels to form global state features, which are input into a pre-trained dual-branch adaptive decision network to obtain the output decision result, thereby generating the final image BEV features. Combining the multi-modal feature confidence weight matrix, the final image BEV features and the multi-modal BEV feature set are weighted to obtain globally fused BEV features, which are input into a 3D obstacle detection head for decoding and output detection results. This application can improve the robustness of multi-sensor fusion perception and obstacle detection accuracy under adverse weather conditions.

The application provides a redistribution layer structure, a semiconductor packaging structure and a manufacturing method thereof. The redistribution layer structure comprises a first connection pad, a first dielectric layer, a first conductive plug, a first metal wiring layer, a second dielectric layer, a second conductive plug and a second metal wiring layer. The first metal wiring layer is electrically connected with the first conductive plug, and the second metal wiring layer is electrically connected with the second conductive plug. The orthographic projection area of the first metal wiring layer on the first connection pad is a first projection area, and the first projection area is not less than 80% of the surface area of the first connection pad. The orthographic projection area of the second metal wiring layer on the first connection pad is a second projection area, and the second projection area is not less than 50% of the surface area of the first connection pad. The application can make the redistribution layer structure stable and robust, and improve the product reliability and production yield.

This invention relates to the field of composite pipe production equipment and discloses a winding machine. It includes a winding machine base (1); a winding machine housing (2); a central rotating frame (30), the side plates (32) of which are connected to each other to form a housing structure around the axis of rotation; and a plurality of tape feeding units (50), each tape feeding unit being respectively installed on the side plate (32) and including a tape reel bracket (52) for mounting a tape reel (51). The tape reel bracket is configured to allow the reinforcing tape on the tape reel to be wound onto a core tube that passes through the central rotating frame and extends along the axis of rotation during the rotation of the central rotating frame. In this invention, the central rotating frame is configured as a housing structure formed by the side plates being connected to each other to form around the axis of rotation, increasing the bending section modulus of the central rotating frame and thus improving its stiffness. This central rotating frame structure is robust and can withstand large loads.

There is disclosed a blank (100) for forming a package (200), the blank (100) comprising: a bottom panel (102); a front wall panel (104); two set of side wall panels (106, 107); a rear wall panel (108); a first lid panel (109a), a second lid panel (109b); and a locking flap (111) configured to be inserted into a recess (121), when the blank (100) has been folded into the package (200), and an opening action by folding the first and second lid panels (109a, 109b) about a first longitudinal side (LSR1) of the rear wall panel (108) is initiated, a locking tongue (111b) of the locking flap (111) interacts with an inner surface (106ci) of the intermediate side wall panel (106c) in a vicinity of the recess (121), and, when an opening action by folding the second lid panel (109b) about an internal fold line (110) is initiated, the folding of the second lid panel (109b) about the internal fold line (110) releases the locking tongue (111b) from the recess (121). The is also disclosed a package (200) formed from such a blank (100).

The application discloses a kind of general data exchange systems based on configurable label structure, it is related to the technical field of data processing and information integration, including parameter module for establishing the identity authentication mechanism of exchange party;Business document module is used to establish data structure definition based on preset exchange demand;Document logic module is used for logical analysis and code decoupling to data structure definition, generates tokenization language script code and execution instruction, constructs execution matrix, realizes the mapping of database physical field and memory logic variable;Standard adaptation module is used to compare and check the generated data content, and the verification result is fed back to the parameter module to correct the exchange rule and parameter configuration.The application implements more intelligent logic separation strategy through structured insight, cooperatively controls data reading, writing and transmission, and realizes complete decoupling of business logic and program code using nested label structure, optimizes the flexibility, universality and maintenance efficiency of data exchange.

This invention provides a high-precision modeling method for porous metallic materials based on a stochastic algorithm and its application in simulating the electrothermal-mechanical properties of materials. It relates to the field of artificial intelligence algorithm technology. The method includes: reconstructing and optimizing an initial reconstruction model of the porous metallic material based on a stochastic algorithm to obtain a three-dimensional reconstruction model; performing slice analysis on the three-dimensional reconstruction model and determining whether the analysis results meet the accuracy error standard; if they do, outputting the three-dimensional reconstruction model. By reconstructing and optimizing the initial model, the three-dimensional structure of porous materials can be accurately simulated, achieving high-precision modeling of porous metallic materials. Generating and growing pore seeds using a stochastic algorithm ensures the randomness and realism of the model. The setting of the accuracy error standard further improves the reliability of the model, ensuring the accuracy of porosity and pore size. This effectively solves the error problem in the modeling process of porous metallic materials, providing a solid foundation for high-precision simulation and material performance prediction.

The application relates to a dual-wavelength Raman-capacitance integrated fertilizer solution component on-line detection device. The Raman spectrum detection module and the capacitance sensor module are electrically connected with a controller respectively. The Raman spectrum detection module comprises a Raman probe, an optical switch, a laser light source, a monochromator, a charge coupled device and a Raman spectrum pipeline. The optical switch, the laser light source, the monochromator and the charge coupled device are electrically connected with the controller respectively. The charge coupled device, the monochromator, the laser light source, the optical switch and the Raman probe are electrically connected in sequence. The probe end of the Raman probe is connected with the Raman spectrum pipeline. The capacitance sensor module comprises a interdigital capacitance pipeline. The Raman spectrum pipeline and the interdigital capacitance pipeline have the same inner diameter and are connected at the end. The application combines the dielectric frequency method and the Raman spectrum method, can give full play to the advantages of both methods, can realize comprehensive, on-line and rapid detection of fertilizer solution component information, and lays a foundation for improving the intelligent level of the water and fertilizer integrated system.

The utility model discloses a multifunctional folding cart, relates to the technical field of multifunctional supports, solves the technical problem that in the prior art, the cart cannot be folded into various required structures in a multifunctional mode, and comprises two pairs of main cross beams, a main hinge connecting frame is fixedly installed between one pair of the two pairs of main cross beams, and the other pair of the two pairs of main cross beams is hinged to the main hinge connecting frame. The other pair of the two pairs of main cross beams is rotationally connected to the main hinge connecting frame, and wheel hinge connecting frames are fixedly installed on the outer side wall faces of one pair of the two pairs of main cross beams respectively, so that the functions of a frame (horse stool), a ladder (step ladder) and a cart can be achieved, various requirements of users on different occasions are met, and the multifunctional folding ladder is suitable for being popularized and applied. The practicability and the flexibility are improved; the folding cart is stable and firm in structure and can bear certain weight and pressure; the folding cart can be easily and rapidly folded and unfolded, a user can conveniently switch and use the folding cart as needed, the stability and safety of the folding cart in the using process are guaranteed, and accidental injuries are effectively prevented.

The invention discloses a traffic intelligent monitoring method and device based on the Internet of Things, and the method comprises the steps: obtaining the traffic flow information through a plurality of vehicle quantity detectors disposed on a traffic road, outputting the interval intuitionistic fuzzy number of the traffic flow through a traffic flow detection module, and arranging a plurality of groups of environment parameter sensors on the traffic road, environmental parameters of temperature, visibility, rainfall, dust and wind speed are detected, the output value of the traffic flow detection module and the environmental parameters serve as input, and the traffic flow value of the detected road section influenced by the environmental parameters is determined through the road section traffic intelligent monitoring module; traffic flow values, detected by the road section traffic intelligent monitoring modules, of detected road sections serve as input, and four predicted values of traffic flow in the four directions of east, south, west and north are output through the regional traffic intelligent monitoring subsystem. Compared with the prior art, the traffic information in the monitoring area can be automatically obtained in real time, the vehicle flow of the road section can be effectively adjusted, and the traffic of each road section is smoother.