577 results about "Metal roof" patented technology

The present invention relates to the technical field of control cabinets, and provides an electrical control cabinet for a thermal power plant, comprising an electrical control cabinet, wherein the electrical control cabinet is provided with a plurality of ventilation openings, a heat absorption plate is fixedly mounted on an inner wall of the electrical control cabinet, a heat dissipation structure is mounted on the heat absorption plate, four connecting bases are symmetrically and fixedly mounted on a top side of the electrical control cabinet, a ventilation structure is mounted on the four connecting bases, two mounting frames are symmetrically and fixedly mounted on the top side of the electrical control cabinet, and an anti-snow structure is mounted on the two mounting frames. According to the present invention, heat dissipation is achieved by means of a combination of heat conduction and air cooling, thereby further improving the heat dissipation effect of the electrical control cabinet. When the present invention is used in winter, if the ambient temperature is low, a fan and an electric heating tube can be turned on to heat internal equipment within the electrical control cabinet, so as to prevent any impact on the operation of the equipment due to excessively low temperatures; when the present invention is used outdoors, a protective metal roof can be employed for snow protection. Furthermore, the present invention also includes a snow removal function.

The invention discloses a temperature effect monitoring method and system for a metal roof, particularly relates to the technical field of building structure health monitoring, and is used for solving the problems of decoupling of temperature monitoring data and structural mechanical response, failure of a static early warning threshold and the like in the prior art. Acquiring three-dimensional temperature field data through a distributed temperature sensing network, and extracting a temperature gradient characteristic value from the three-dimensional temperature field data; a piezoelectric film sensor is used for collecting constraint point micro-vibration signals, and dynamic constraint reaction force spectrum characteristic values are extracted through signal transformation and manifold learning; establishing a temperature gradient and mechanical characteristic coupling model to generate a temperature stress evaluation value; dynamically adjusting an early warning threshold range according to the environmental parameters; when the evaluation value exceeds a threshold value, a structure safety early warning signal is output; multi-physical field coupling analysis of temperature field distribution and structural response is achieved, an environment-adaptive dynamic early warning mechanism is constructed, and the accuracy and reliability of metal roof temperature effect monitoring are remarkably improved.

The invention relates to the technical field of metal roof steel architecture buildings in general building structures, in particular to a damping structure of a metal roof steel architecture building. The device comprises steel structure stand columns, steel structure cross beams, arch-shaped upper suspension rods and metal roof panels. The left end and the right end of each steel structure cross beam are installed at the top ends of the two symmetrical steel structure stand columns. The middle of the arched upper suspension rod is located above the steel structure cross beam, the two ends of the arched upper suspension rod in the length direction correspondingly penetrate through suspension rod through holes formed in the two ends of the steel structure cross beam respectively, and the two ends of the arched upper suspension rod in the length direction are connected with the inner sides of the two steel structure stand columns through straight hole bolt limiting assemblies respectively. The left and right ends of the steel structure cross beam are mounted at the top ends of the steel structure stand columns through arc hole bolt spring limiting assemblies; and the metal roof panel is mounted on the arched upper suspension rod and the steel structure cross beam through the elastic universal assembly. The overall damping performance of the building can be effectively improved, and the safety of the overall structure of the building is better ensured.

The invention belongs to the technical field of mechanical engineering robots, and particularly relates to a railway station hidden space steel structure disease automatic inspection method comprising the following steps: S1, route autonomous planning; s2, task inspection; s3, periodically and regularly inspecting; s4, accurately and automatically avoiding obstacles; s5, intelligently identifying problems; and S6, automatically analyzing the data. Aiming at the common problems of steel member corrosion, bolt looseness, weld joint cracking, water leakage of a metal roof and the like in a hidden space of a steel structure of a high-speed rail station house roof, the intelligent inspection robot needs to have high-precision detection and identification capabilities, and can inspect and inspect the high-speed rail station house roof in a narrow space with dense rod pieces, complex pipelines and a dark or dim light environment. And comprehensive and meticulous inspection is carried out on the steel structure. Roof leakage monitoring and response speed in extreme weather can be improved, all-weather unmanned intelligent inspection is realized, and labor cost and safety risk are reduced.

The invention relates to the technical field of electric digital data processing, in particular to a roof wind resistance intelligent design construction operation and maintenance system and method and electronic equipment. The system comprises a data management platform used for storing roof standard construction data and typical construction cases; the modeling optimization module is used for generating and carrying out iterative optimization on the initial roof model and outputting the optimized roof model; the automatic typesetting module is used for performing plate division on the roof model by utilizing a genetic algorithm and outputting a typesetting result capable of meeting a genetic optimization target; the automatic blanking module is used for generating material processing data based on the production data, the roof standard construction data and the typical construction case; and the operation and maintenance monitoring module is used for monitoring the physical state of the roof panel and the environmental data, predicting the damage risk of the roof panel and generating a corresponding early warning signal. The wind-resistant safety, the design construction efficiency and the full-life-cycle management level of the metal roof of the large public building can be remarkably improved.

The utility model discloses a mounting structure for a metal roof and a photovoltaic module. The mounting structure comprises the photovoltaic module, the metal roof and a bracket, the metal roof is obliquely arranged, and the photovoltaic module is horizontally arranged above the metal roof; the photovoltaic module is fixed on the metal roof through a bracket; the support type is simplified, batch machining can be achieved, the finished product form is high, universality is high, and the support is simple, practical and easy to use to form assembly type installation.

An upright seamed metal roof panel, comprising a flat bottom plate, a male rib plate and a female rib plate arranged at both ends of the flat bottom plate. A sliding hook is provided between two metal roof panels. The female rib plate wraps the top ends of the sliding hook and the male rib plate of the adjacent metal roof panel and is bent once by a seaming machine to form a 360° seam. The straight-edge part of the 360° seam is bent secondarily by 50-70° towards the male rib plate side. Compared with the prior art, the present invention has good wind resistance and waterproof performance and is more suitable for the current light steel building roof system.

The invention relates to the technical field of photovoltaic power generation systems, discloses a photovoltaic frame system and a stable installation method, and aims to solve the technical problems that in the prior art, a systematic stable installation scheme for a metal roof photovoltaic frame system is lacked, and connection stability, installation efficiency, water resistance and pressure resistance cannot be achieved at the same time. The method comprises the following steps: mounting the left and right frames, and connecting the left and right frames with the bracket through outer hexagon bolts; mounting upper and lower safe edges, and fixing the upper and lower safe edges on the frame foundation by using structural adhesive and bolts; connecting codes are installed, and the connecting codes are arranged between the left and right frames and the upper and lower safe edges; a cushion block is arranged between the bracket and the roof; structural adhesive is smeared at the joint of the support and the roof so as to enhance the bonding force between the support and the roof; sealants are applied to all joints, and the sealants are used in cooperation with the cushion blocks, so that the sealing performance between the roof and the support is ensured. According to the technical scheme, efficient and stable installation of the photovoltaic module is achieved through structural connection optimization, sealing waterproof and pressure dispersion design.

The utility model discloses a TPO asbestosed wire gauze waterproof and heat preservation integrated composite roof panel which comprises a TPO asbestosed wire gauze layer, a heat preservation layer and a roof panel bottom plate. The TPO asbestosed wire gauze layer is formed by compositing a TPO waterproof coiled material and an asbestosed wire gauze reinforcing layer, the heat preservation layer is fixed to the top face of the roof board bottom plate, the TPO asbestosed wire gauze layer is fixed to the top face of the heat preservation layer, and the integrated composite roof board is formed. During splicing, the TPO waterproof roll of the front integrated composite roof panel is fixed to the TPO asbestosed wire gauze layer of the rear integrated composite roof panel in a lap joint mode through a connecting piece. And the asbestosed wire gauze reinforcing layer of the previous integrated composite roof panel is secondarily lapped on the TPO waterproof coiled material and the connecting piece of the previous integrated composite roof panel and the asbestosed wire gauze reinforcing layer of the next integrated composite roof panel. The utility model relates to the technical field of roof structures, and can solve the problems that in the prior art, a metal roof board has many construction procedures, and waterproof roll joint parts are prone to cracking and leakage.

The invention discloses an airport terminal metal roof welding seam detection system and method, and the system comprises a roof data collection device and a robot carrying the roof data collection device, and the roof data collection device is used for obtaining the surface data of left and right welding seams of the robot. The robot carries out auxiliary positioning on the relative track position of the robot through a main control system and a TOF laser range finder, the main control system is formed by connecting four independent single-chip microcomputers in a mutual communication mode, according to surface data of left and right weld joints of the robot, the defects of the terminal building metal roof are inspected, and the defects comprise broken welding, weld penetration, dislocation welding and spot welding. By adopting the technical scheme of the invention, an airport terminal metal roof inspection task is realized.

The utility model relates to a ridge cap mounting node, which comprises a ridge cap, a metal roof panel, a purline and a metal outer plug, the bottom surface of the metal roof panel is fixedly connected with the purline, the metal outer plug, the ridge cap and the metal roof panel are all provided with prefabricated holes, and waterproof adhesive tape is laid on the top surface of the metal roof panel along the prefabricated holes. The bottom of the metal outer plug is adhered to the waterproof adhesive tape on the top face of the metal roof board, the waterproof adhesive tape is also laid on the top face of the metal outer plug, and the ridge cap is placed on the metal outer plug and fixed to the metal outer plug through the suturing nails. The metal outer plug is arranged between the ridge cap and the metal roofing board, and the ridge cap is fixed on the metal outer plug, so that the problem of coating damage caused by direct connection of the ridge cap and the metal roofing board is avoided.

Disclosed in the present invention is a connection structure shared by a photovoltaic system and a metal roof system, the connection structure comprising concrete buttresses, pre-embedded parts, adapters, cross beams, a metal roof main keel and a photovoltaic system main keel, wherein the lower portion of each pre-embedded part is buried in a corresponding concrete buttress, the upper end of the pre-embedded part is connected to a corresponding adapter, and the adapter is fixed to the upper portion of the concrete buttress; each cross beam is connected to a corresponding adapter by means of a first connector; the metal roof main keel is perpendicular to the cross beams and is welded and fixed to the side portions of the cross beams; and the photovoltaic system main keel is arranged in parallel to and above the metal roof main keel, and the photovoltaic system main keel is connected to a second connector fixed to the top of each cross beam. The present invention has the beneficial effects that the metal roof main keel and the photovoltaic system main keel are integrally mounted on the cross beams, and the cross beams are fixed to the buttresses, such that the integrity of the whole structure is good, and the stability and wind resistance of the whole roof system are significantly improved.

The invention belongs to the field of metal roof waterproof defect detection, and particularly relates to a metal roof waterproof defect real-time detection system based on multi-sensor fusion. The invention discloses a metal roof waterproof defect real-time detection system based on multi-sensor fusion, and the system comprises an acquisition module which comprises an ultrasonic detection assembly, a directional sound acquisition assembly, a visual image acquisition assembly, and an optical grating; the ultrasonic detection assembly is arranged on the side face of the roof and used for emitting ultrasonic waves and receiving reflected signals. The grating is arranged corresponding to the ultrasonic detection assembly and is used for emitting light beams to the roof when the ultrasonic detection assembly emits ultrasonic waves; and the visual image acquisition assembly and the directional sound acquisition assembly are carried on the movable holder. According to the scheme, through combination and cooperation of multiple detection principles, through the stages of initial detection, precise verification and the like, the recognition precision and efficiency are improved, the problem that in a metal roof overlapping or splicing scene, the detection efficiency of the waterproof defect of the metal roof is low is solved, and full-scene efficient detection is achieved.

A passive ridge vent for metal roofs provides a passive ridge ventilation solution that when coupled with vents in the field and eave provide a complete attic ventilation solution. The passive ridge vent is secured in an opening along the ridge between rafters and the side and edge wings seal against any suitable metal roof. The input / exhaust channels extend through vertical side walls to minimize the energy needed to cause convection out of the chimney.

The utility model relates to the technical field of roof manufacturing, in particular to arched corrugated metal roof manufacturing equipment which comprises a base, fixing frames are fixedly installed on the two sides of the top of the base respectively, clamping assemblies are arranged on the outer sides of the two fixing frames respectively, and a roof is arranged between the clamping assemblies. A frame seat is fixedly connected to one end of the base, a driving mechanism is arranged in the frame seat, a supporting frame is arranged on the outer side of the driving mechanism, a fixed seat and a movable seat are arranged at the upper end and the lower end of the outer side of the supporting frame correspondingly, and arch frames are installed at one end of the fixed seat and one end of the movable seat correspondingly. The two arc-shaped frames are arranged on the fixed base, paint spraying assemblies are arranged in the sides, close to each other, of the two arc-shaped frames, an adjusting mechanism is arranged in the fixed base, one end of the adjusting mechanism penetrates through the interior of the movable base, all-directional paint spraying treatment can be conducted on roofs with different arc radians, and the working efficiency is greatly improved.

The utility model discloses a double-layer metal roof structure which comprises a steel structure body and is characterized by comprising a first roof layer and a second roof layer, the first roof layer and the second roof layer are connected through an adjustable elevation support, and the first roof layer is arranged below the second roof layer and connected with the steel structure body. By the adoption of the double-layer metal roof system with the good heat preservation performance, the problems that a traditional single-layer metal roof is poor in heat preservation performance and serious in heat loss are solved, the heat preservation and insulation effect is improved, indoor energy consumption in summer and winter is reduced, and energy conservation and environment protection are facilitated. Meanwhile, due to the design of the double-layer metal structure, the bearing capacity is higher, and better waterproof, anti-corrosion and durability are achieved. And the maintenance cost after being put into use is reduced, and better economic benefits are achieved.

The invention relates to the technical field of roof image recognition, in particular to an AI-based metal roof construction quality detection system, which comprises an included angle mutation recognition module, a tangential anomaly extraction module, a curvature stability recognition module, a path fitting offset analysis module and a defect type judgment module. According to the method, by constructing the boundary node included angle change rate sequence, the abrupt change points of the splicing parts of the metal roof are accurately recognized, and the change trend of the local structure is effectively revealed; in combination with a tangential displacement sequence and an included angle mutation feature between adjacent boundary nodes, capturing a direction continuity imbalance section, and enabling abnormal direction variation to present a dynamic evolution trajectory; on the basis, stability judgment is further carried out on the boundary node curvature distribution state, a curvature fluctuation concentrated area and an extreme point are recognized through differential analysis, and geometric expression extraction of laying precision abnormity is enhanced; and the residual error extraction capability for the abnormal trend can be obtained in time sequence evolution.

The invention discloses a preparation process of an exposed rubber asphalt waterproof coating, relates to the technical field of waterproof coatings, and provides a method for introducing a polyurethane prepolymer HS-PU containing dynamic disulfide bonds into a base material system in order to solve the problems that a traditional coating is poor in elastic recovery after being cured and easy to crack at low temperature; the preparation method comprises the following steps: carrying out condensation polymerization on 4, 4 '-diaminodiphenyl disulfide and polytetrahydrofuran glycol to form a reversible cross-linked network; a temperature response type topological structure is constructed in a dynamic curing stage by combining the synergistic ratio of the anionic emulsified asphalt and the SBR emulsion; the preparation method comprises the following steps: preparing an HS-PU prepolymer, mixing base materials, carrying out gradient temperature control curing and carrying out low-temperature grinding, the elastic recovery rate of the obtained coating at-30 DEG C is greater than or equal to 75%; the method is suitable for metal roofs, bridges and other large-temperature-difference scenes.

The invention discloses a triple locking metal roof system which comprises a metal roof board, a fixing support and hook pieces, the hook pieces comprise the upper hook piece and the lower hook piece, the fixing support is provided with a pin groove, the lower end of the lower hook piece is connected with a pin shaft, the pin shaft is installed at the pin groove, and the two sides of the bottom of the fixing support are connected with a main body structure through fasteners. The metal roof panel comprises a panel body, a male rib, a female rib and buckling grooves, the two sides of the panel body are connected with the male rib and the female rib through the buckling grooves, and the male rib and the female rib are welded to the upper hook piece. According to the roof system, the waterproof performance is guaranteed, the negative pressure resistance is improved, the thermal expansion and cold contraction amount is larger, and the roof system is more suitable for being applied to large roofs.

The application discloses a large-span steel structure and a metal roof integrated construction method thereof, and mainly comprises the following steps: (1) arranging assembling jigs and fulcrums at boundary positions on an assembling operation surface according to the construction partition, design boundary and assembling requirement of the large-span steel structure; (2) completing the assembling construction of the large-span steel structure on the assembling jigs; (3) reserving part of the assembling jig fulcrums near the original support boundary of the large-span steel structure and unloading the rest of the assembling jig fulcrums; (4) completing the metal roof system installation operation on the unloaded steel structure; (5) installing corresponding lifting or hoisting construction measures; (6) integrally lifting or hoisting and positioning; (7) fixing the large-span steel structure and the metal roof on a supporting structure; and (8) integrally unloading and completing the construction. The application solves the defects of the existing steel structure and metal roof integrated construction, can avoid the excessive deformation of the metal roof in the integrated construction process, is safe and controllable, and significantly improves the construction quality.

A lightning protection system for an aluminum-magnesium-manganese upright lockrand metal roof comprises a lightning protection copper strip and a Z-shaped metal guide sheet, and is characterized in that the lightning protection copper strip is fixed on a secondary purlin and a purlin support; one end of the Z-shaped metal guide piece is installed on the aluminum alloy support, the other end of the Z-shaped metal guide piece is fixed to the secondary purline, the conductive effect from the aluminum alloy support to the secondary purline is guaranteed, the lightning protection folding piece is covered with the cut TPO waterproof roll, and water leakage is prevented. The lightning protection system for the aluminum-magnesium-manganese upright lockrand metal roof has the advantages that during installation of the secondary purlins of the roof, the lightning protection copper strips are installed between the secondary purlins and the purlin supports, and the conductive metal blocks are installed on the aluminum alloy supports of the roof panels, so that a large conductive section is formed, the conductive effect is enhanced, and the service life of the roof is prolonged. The problems of time-consuming, labor-consuming and high-cost lightning protection measures of frequent lightning protection construction are solved, and the lightning protection requirement is effectively ensured.

The present invention discloses a gutter connection structure between a skylight and a metal roof, comprising a gutter, a skylight, and a curved roof panel. The bottom end of the gutter is arranged on the main purlin, and side wall square tubes are arranged on both sides of the gutter. The bottom ends of the side wall square tubes are welded to the main purlin, and the edges of the gutter overlap the top surfaces of the side wall square tubes. A full-length fixing piece is provided on the inner wall of the gutter, and the full-length fixing piece is connected to a shedding plate via a full-length aluminum alloy buckle strip. The lower end of the shedding plate is bent inwardly into an acute angle, and the upper end of the shedding plate cooperates with the skylight or the curved roof panel. The gutter connection structure between the skylight and the metal roof of the present invention is ingeniously designed and highly waterproof. It effectively solves the problem that when the gutter is located between the skylight and the metal roof, rainwater accumulates and easily leaks, causing rainwater to flow back into the insulation layer of the roof or the lower end of the curtain wall glass of the skylight, causing damage to the building.

The utility model discloses a condensation control radiation heat exchange plate, which relates to the technical field of heat exchange plates, and comprises a heat exchange plate main body, the heat exchange plate main body comprises an aluminum plate protection shell, the bottom of the aluminum plate protection shell is provided with a heat insulation plate, the bottom of the heat insulation plate is provided with a flat elliptic copper pipe, and the flat elliptic copper pipe is provided with a heat insulation layer. A metal heat-conducting fin is arranged outside the flat oval copper pipe and located at the bottom of the heat preservation plate, and a graphite assembly is arranged at the bottom of the metal heat-conducting fin. The condensation control film is an effective method for solving the problem of condensation under the non-heat-insulation metal roof, is a self-adhesive film adhered to a metal plate in the forming process, and is a more direct and economical method for preventing condensate water on the non-heat-insulation metal roof from dripping. The heat exchange plate main body captures condensed water through a specially designed pocket in the condensation control film, the condensation control film keeps the water in the material, and the retained condensed water can be simply evaporated back to the air until the environmental condition is recovered to be lower than the dew point.

The utility model discloses a metal contour plate rib clamp drawing force detection device which comprises an installation platform, a counter-force frame is arranged above the installation platform, a tension test device is arranged on the counter-force frame, a plurality of purlines are arranged on the installation platform, the purlines are in sliding connection with the installation platform, and the tension test device is arranged on the counter-force frame. A metal roof panel is placed on the purline, and a metal clamp matched with the tension testing device is arranged on the metal roof panel. According to the utility model, the fixture can be installed according to the arrangement condition of the actual engineering, and the stress state of the fixture in the actual engineering can be simulated more truly. The longitudinal beams are provided with through long sliding grooves, and the distance between the purlins can be rapidly adjusted through T-shaped sliding blocks according to actual engineering. The device is easy to manufacture, convenient to install and capable of being repeatedly used.

The utility model discloses a sliding groove type guide rail installation structure which comprises a guide rail, the bottom of the guide rail is connected with a plurality of fixing bases used for being fixed to a roof, and the bottom of the guide rail is provided with a groove used for being connected with the fixing bases. The groove is formed in the bottom of the guide rail, the guide rail is connected with the fixing base for fixing the guide rail through the groove, and the guide rail is installed on the roof. The guide rail can be installed on the fixing base without additional trepanning so as to be installed on the roof, the situation that the continuous hole positions at the bottom of the guide rail are different in interval size due to the fact that the wave crests of the metal roof are not uniform and the interval distance is not fixed is avoided, the on-site roof wave crests do not need to be measured for different metal roofs, and the measurement accuracy is improved. There is no need to determine intervals of continuous holes in the bottom of the guide rail.

The invention provides a mounting node and method for a metal ridge, and belongs to the technical field of steel structure building construction.The mounting node comprises a notch formed in the wave crest end of a metal roof panel and a ridge structure arranged above the metal roof panel; a sealing plate is welded at the section of the notch; the ridge structure comprises a metal ridge plate and plugs arranged on the lower portions of the two sides of the metal ridge plate. The plugs and the metal ridge plate are integrally formed or connected in a welded and sealed mode. The lower end of the plug is fixedly welded to the position above the trough of the metal roof panel, and the outer side wall of the plug is fixedly welded to the sealing plate. The problems that in the prior art, when butyl rubber and other sealing materials are adopted for sealing and waterproofing, the waterproof sealing position is hidden, and inspection and maintenance are inconvenient can be solved; and when the existing welding seam sealing water prevention is adopted, the requirement on the welding technology is high.

The utility model discloses a metal roof edge sealing prefabricated member and a pressing plate assembly thereof, which cover the joint of a metal roof and a gutter, and are characterized in that the metal roof edge sealing prefabricated member comprises a prefabricated waterproof coiled material, and the prefabricated waterproof coiled material comprises a roof section and a gutter section which are integrally formed; the positions, corresponding to the protrusions of the metal roof, of the roof section are sunken to form sunken parts used for being attached to the protrusions. A reinforcing part used for preventing the edge of the metal roof from puncturing the roof edge sealing prefabricated part is arranged at the position, corresponding to the metal roof, of the gutter section in a protruding mode. The waterproof roll is made into the prefabricated part matched with the roof and the gutter in shape, the complicated cutting step can be omitted during construction of constructors, and the prefabricated part is directly attached to the joint of the roof and the gutter and welded, so that edge sealing of the joint of the roof and the gutter can be completed.

The utility model discloses a metal roof structure with heat insulation effect, which comprises a metal roof, two ends of the metal roof are respectively integrally extended with a connecting end and a sleeving end, the surface of the connecting end is provided with a sealing gasket, and the surface of the sleeving end is respectively fixedly connected with an outer side plate and an inner side plate. A connecting lead screw is arranged between the outer side plate and the inner side plate, and a telescopic strip is arranged between the outer side plate and the inner side plate. According to the metal roof structure with the heat preservation and heat insulation effects, the connecting end is slidably connected into the sleeving end in a sleeved mode, then the connecting lead screw is locked on the inner side plate, the outer side plate is driven to extrude the sleeving end, and then the telescopic strip can automatically stretch out and draw back along with extrusion retraction of the outer side plate, so that the sleeving end and the connecting end are extruded and fastened; in addition, the strength of the metal roof can be enhanced through the reinforcing ribs, and the problem of deformation in the transportation and carrying process is avoided.

The invention discloses a drainage system for a large-span arc-shaped metal roof of a coal shed and a construction method.The drainage system comprises a buttress, a top plate is arranged at the top of the buttress through a main purline, the main purline is obliquely arranged, the bottom end of the main purline is close to the buttress, and a triangular supporting frame is fixed to the outer side of the buttress; the surface of the triangular supporting frame is provided with a water diversion ditch, and the water diversion ditch is provided with a communicating groove corresponding to the top plate. The inner bottom surface of the gutter is inclined, the lower end of the inclined surface is far away from the buttress, and one end of the gutter is provided with an inclined panel extending downwards. The large-span roof drainage device has the advantages that rainwater is guided to the diversion ditches on the triangular supporting frame through the slope of the roof, the main diversion pipe and the secondary diversion pipe are connected with the main diversion holes and the secondary diversion holes in the diversion ditches respectively, graded collection and efficient diversion of the rainwater are achieved, smooth drainage of a large-span roof is guaranteed, and accumulated water is reduced.