149 results about "Flame height" patented technology

The invention provides a method of predicting and accessing level of a wildfire-caused trip risk in power transmission lines. Based on the power transmission line corridor fire risk level as an indicator and factors such as daily precipitation, temperature, wind speed, relative humidity, slope, sloping direction, road network density, population density, conventional solar terms and vegetation water content, influence factors to the wildfire occurrence risk are quantitatively assessed so as to establish a wildfire risk assessment model. During occurrence of a wildfire, based on the line trip risk level as an indicator and flame height bridge ratio, vegetation variety and vegetation distribution, the influence factors to the power transmission line trip risk level is quantitatively assessed in the case of the wildfire so as to establish a line trip assessment model. The method is applied to predicting and accessing the level of the wildfire-caused trip risk in the power transmission lines by integrating the two models. The method according to the technical scheme has the advantages that the trip risk in the power transmission lines can be subjectively predicted and assessed on the basis of real-time data, targeted preventive measures are taken in advance, wildfire-caused trip accidents of the power transmission lines are maximally decreased, and the method is significant to the improvement of safety and running reliability of the power transmission lines.

A rigid planar wick and one or more fabric wicks are adhered together for use in candles. The fabric wicks may be planar fabric wicks, traditional shaped string-shaped wicks or a fabric sheath. The rigid wick is of a predetermined width, length, and thickness and the planar fabric wick is of some dimension equal to, less than, or greater than the planar surface area of the rigid wick. By combining both a planar fabric wick and a rigid planar wick, consistency in flame heights can be achieved, providing an improved wick for candle use.

A medical mouth mask flame retardant property test instrument belongs to the test instrument technical field, and is used to test the flame retardant property of medical mouth masks and all protective mouth masks. The test instrument consists of a combustion testing mechanism and a control mechanism which are connected together, wherein the combustion testing mechanism is a combustion testing box provided with a transparent observation door; the inside of the combustion testing box has a headform sample frame motion device, an ignition device, a flame temperature sensing device, a flame height measuring device and a combustion device; the control mechanism comprises a flame temperature display instrument, a combustible gas pressure-regulating device, a flame height regulating turnbutton, a headform motion control key, an ignition switch and other function-control keys. The invention completes the entire testing process through adopting the special human body headform sample frame and apparatus, automatic control of each motion and testing parts, the special structural design of a given gas source igniter and special air supply tube control mode, etc. Moreover, the test instrument has a simple structure, convenient use, high safety and reliability and high cost performance; meanwhile, the testing efficiency, testing cost, advanced technology and testing precision of the test instrument reach an advanced level.

A gas burner head with extra simmer capabilities, a burner base assembly and combinations thereof are disclosed. A gas burner head having one or a multiple fuel / air mixture exit ports with a simmer flange located above the ports and extending beyond the port exit by a predetermined distance allows the flame / fuel-air mixture from a given port to be fully or partially covered from above at a desired flame height or fuel-air mixture setting. The burner head can be a single or multiple piece assembly and can be used as part of a complete system or as an added-on component to an existing burner system. A burner base assembly has a burner base plate, a venturi and an orifice enclosure that creates a means to supply the required gas for combustion and also enables the burner head to be fully sealed. The venturi can be built-in as part of the burner base plate or made as a separate component and assembled through the burner base plate to create a sealed path. The orifice enclosure houses the gas injector orifice and can be installed in a separate compartment partitioned from the burner base plate by a sheet of metal (or partition plate) or in an enclosed area or plenum. Both the burner base plate / venturi combination and the orifice enclose may be securely attached to each other to maintain a predetermined distance between the gas orifice and the venturi inlet to allow a predetermined amount of primary air and gas mixture to be injected through the venturi into the burner head to create proper combustion. The burner base plate may be installed in a slightly raised position relative to the partition plate and / or orifice enclosure to create an air gap and the path through which primary air flows. A secondary source of primary air may be supplied through openings located around the orifice enclosure. The burner base assembly can be a single or multiple piece assembly and can be used as part of a complete system or as an added-on component to an existing burner system. Because of the rules governing abstracts, this abstract should not be used to construe the claims.

The invention discloses a multi-feature fusion based infrared forest fire judgment method. The method comprises the following steps: A, inputting an infrared image sequence; B, performing binarization processing; C, performing morphological processing; D, extracting flame features; E, performing SVM classification judgment on the flame features; F, performing classification decision-making by utilizing a Bayes classifier; and G, judging whether a fire occurs or not through data in the step F. The flame features in the step D include an infrared flame height characteristic, an infrared flame gradient characteristic, an infrared flame moving characteristic and a flame spectrum characteristic. According to the multi-feature fusion based infrared forest fire judgment method provided by the invention, the fire can be detected quickly, accurately and safely in the early stage of the forest fire, so that the judgment precision of forest fire prevention is greatly improved and the working efficiency is improved.

The invention discloses a platform for testing the combustion characteristics of typical vegetations in a power transmission line corridor; the combustion characteristics of typical vegetation combustibles capable of enabling a power transmission line to be tripped are obtained; and data support is provided for analyzing a clearance breakdown mechanism under forest fire conditions. The platform is composed of the combustibles, an iron plate, a thermal insulation plate, a weight sensor, a mass display instrument, a thermocouple array, a thermocouple bracket, a transmission line, a temperature display instrument, a scaleplate, a DV camera, two electrodes, an insulation resistance tester and a conductor wire. According to the platform, combustion characteristic tests of the different vegetation combustibles can be conveniently carried out; the combustion characteristic quantities in the combustion process of the vegetations, such as flame height, flame temperature, fire intensity and flame resistance, are obtained; the data support can be provided for simulating a clearance discharging test under the forest fire conditions; and the platform is simple to operate and high in reliability.

A gas cook-top with glass (capacitive) touch controls and automatic burner re-ignition is provided. The gas cook-top utilizes a variable flow gas control valve that is driven by an electronic controller whose user interface provides a glass capacitive touch interface. Various electronic features including safety lockouts and burner re-ignition are provided, as is relational control of the burner flame. As a user moves their finger along a flame adjust indicator, the electronic control positions the variable flow gas valve to control the flame height of the burner to correspond to the relative position along the indicator selected by the user.

The invention relates to a flammable liquid planar free-flowing combustion simulation experimental device and method. The device comprises an oil supply system, a rogue system, an overflow system anda test system. The flammable liquid is pre-placed in an oil drum, and is flown into a flow surface tray through a peristaltic pump, a silicone hose and a steel pipe buffer tub for ignition and burning, a thermocouple tree of the test system, a camera, a bonded thermocouple, a radiant heat flow meter and an infrared thermal imager are employed to perform experiment data and image collection, and are connected with a multi-channel data collection instrument for remote data transmission, real-time display and control so as to achieve measurement of parameters such as flow burning areas, temperatures, heat radiation and the flame heights, and through change of the leakage parameters, material cushion and flow surface angles, the flammable liquid planar free-flowing combustion simulation experimental device and method are high in experiment efficiency, safe and controllable, simple to operate, convenient to use and accurate in measurement, and can develop planar free-flowing combustion state research of different substances, different flow surface types and different flow angles.

The invention discloses a lighter fully automatic online detector. A motor drives two driving wheels to rotate through a transmission belt, and drives a driven wheel to rotate through two transmission chains which are arranged in equidistance with material boxes with automatic clamping mechanisms. A worktable is provided with a detecting room, and the inlets along the moving direction of the transmission chain at the two sides of a detecting frame are respectively and orderly provided with a pair of photoelectric switches and a proximity switch, which are equidistantly provided with eight sets of detecting devices and releasing rods which are parallel to a displacement characteristic curve detecting mechanism and a flame height detecting mechanism according to the pressure, and vertical to the moving direction of the transmission chain. A mechanism arm is arranged above the outlet of the detecting room, the worktable at the front of the inlet of the detecting room is provided with a touch screen, and the transmission chain and the worktable are provided with positioning units. The device not only automatically detects such parameters as pressure, flame height and igniting ratio of the lighter on line, and separates the disqualified lighters. The invention is characterized in high automatization degree, high efficiency and high precision.

The invention relates to an apparatus for detecting the flame-height of disposable gas lighters which comprises a conveying fixture for carrying lighter assembly; a conveying guide rail for guiding the above-mentioned conveying fixture according to operation process; a conveying mechanism for conveying the above-mentioned conveying fixture along the conveying guide rail; an air remover for removing residual air in gas tank; a plurality of nozzle locker for locking the nozzle of each lighter assembly to the greatest extent; a nozzle presser for pressing the nozzle component downward and minimizing the distance between the lower end of the nozzle component and a sponge component; a plurality of flame adjuster for adjusting the nozzle distance of each lighter assembly and setting the flame-height within a certain range; a defective product remover for removing unqualified lighter assembly incapable of adjusting the flame-height to a normal range; and a controller for controlling the action of each structural element forming the above-mentioned detection device.

The invention disclose a utility tunnel fire experiment platform system and an experiment method. A linear fire source experiment frame with freely-adjustable positions and a high-power fire source calorimeter system suitable for pipe gallery fire are arranged in a utility tunnel fire simulation laboratory; the flame height measuring and smoke layer thickness measuring device is arranged outside the utility tunnel fire simulation laboratory, and is used for preforming high-definition video recording on a utility tunnel combustion chamber area, and processing the recorded video to obtain a curve of flame height and smoke layer thickness changing with time; and the linear fire source experimental frame with freely-adjustable positions is arranged in the utility tunnel fire simulation laboratory, and thus the accurate movement and positioning in the horizontal direction and the vertical direction can be realized. The system and the method can realize simulation experiments of internal fires in utility tunnel under multiple spatial positions, measure data such as mass loss rate of fire source, heat release rate, flame height of fire source, thickness of smoke layer in pipe gallery andthe like in real time, and lay a foundation for scientific research of fires in the utility tunnel.

A gas cook-top with glass (capacitive) touch controls and automatic burner re-ignition is provided. The gas cook-top utilizes a variable flow gas control valve that is driven by an electronic controller whose user interface provides a glass capacitive touch interface. Various electronic features including safety lockouts and burner re-ignition are provided, as is relational control of the burner flame. As a user moves their finger along a flame adjust indicator, the electronic control positions the variable flow gas valve to control the flame height of the burner to correspond to the relative position along the indicator selected by the user.

The invention relates to a test technology of a hydrogen storage pressure vessel and aims to provide the local gas cylinder fire test system with a safety isolation device. The local gas cylinder fire test system comprises the safety isolation device composed of a circular floatable sealing head and a cylindrical steel plate-concrete composite structure; a to-be-measured gas cylinder and a fire test bench are arranged inside the safety isolation device; the fire test bench comprises a bearing frame on an upper layer and a tube box on a bottom layer; quartz fiber cloth is paved between the bearing frame and the tube box; two fuel supply pipes with spray nozzles and a diffusion nozzle taking the quartz fiber cloth as gas fuel are formed in the tube box; combustion areas of the spray nozzles in the two fuel supply pipes are respectively corresponding to a local combustion area and an overall combustion area. The local gas cylinder fire test system provided by the invention has the benefits that the test safety is fully guaranteed, and local fire test and overall fire test can be performed; the remote operations of burner ignition, flame height adjustment, extinguishment, thermocouple data acquisition, video monitoring transmission and the like are realized.

A chafing dish for rapidly bringing catered food items up to the temperatures required for safe food handling and optimal flavor enhancement, and even heating of the food items thereafter without a constant monitoring of the flame height. The invention utilizes butane gas as a heat source and a burner control mechanism with a butane burner integrated into the base of a chafing dish, a bracket to hold a butane can securely in place, an engaging apparatus to start the flow of butane from the butane can to the burner, a copper tube to transport butane from the butane can to the burner, an electronic ignition switch and insulated wiring to ignite the butane at the burner, a burner control mechanism and regulator to regulate the flow of butane to the burner for the purpose of allowing a range of flame height and temperature, and a series of ventilation holes in the base of the chafing dish.

The invention relates to the technical field of gas stoves, and provides a gas stove. The gas stove comprises a stove body, a bracket erected on the stove body, burner assemblies arranged in the stove body and a control circuit arranged in the stove body, wherein each burner assembly comprises a burner, a gas inlet pipe connected to the burner, a valve, a gas pressure sensor and a lifting device mounted at the bottom of the burner, the valve and the gas pressure sensor are arranged sequentially on the gas inlet pipe in the gas inlet direction, and the valve, the gas pressure sensor and the lifting device are electrically connected with the control circuit respectively. According to the gas stove, the opening degrees of the valves are different, then the flame heights of the burners are different, the gas pressure values detected by the gas pressure sensors are also different, therefore, a corresponding relation between the gas pressure and the flame height can be established; the control circuit can control lifting and dropping of the lifting devices according to the gas pressure detected by the gas pressure sensors, then the burners are driven to lift and drop, the outer flame of the flame of each burner is controlled automatically to be contacted with the bottom of a pot, the optimal heat transfer effect is realized, and energy is saved.

The invention relates to the technical field of gas ranges, and provides a gas range and a gas range bracket. The gas range comprises a kitchen range body, a bracket erected on the kitchen range body, a furnace head arranged in the kitchen range body, a gas inlet pipe connected with the furnace head, a valve, a gas pressure sensor, a lifting device for driving the bracket to move up and down, and a control circuit arranged in the kitchen range body, wherein the valve and the gas pressure sensor are arranged on the gas inlet pipe in sequence along a gas incoming direction, the gas pressure sensor and the lifting device are electrically connected with the control circuit respectively. According to the gas range, due to different switching-on degrees of the valve, the heights of flames of the furnace head are different, and the gas pressures detected by the gas pressure detector are also different, therefore, a corresponding relation between the gas pressure and the flame height can be established; and the control circuit can be used for controlling the lifting of the lifting device according to the gas pressure detected by the gas pressure sensor so as to drive the lifting of the bracket and further automatically control outer flames of the flames of the furnace head to be in contact with the bottom of a boiler body erected on the bracket, so that the best heat transfer effect and further an aim of saving energy are achieved.

The campfire safety apparatus shields people and animals from unintentional contact with a campfire. The apparatus encloses the fire ring of a campfire to protect potential burn victims from the flames or smoldering coals. The apparatus may be a single unitary unit for permanent installations or the apparatus may be constructed of a number of rigid interlocking safety panels joined together to create an apparatus that is portable. The top edge, or upper rail, of the apparatus is above the campfire flame height such that a child or adult cannot trip over the apparatus and fall into the fire ring. The interlocking rigid safety panels incorporate cooperating pin receivers that lock the panels together when a pin is inserted. In certain embodiments the pins extend through the cooperating pin receivers and terminate into the ground to anchor the apparatus and increase its ability to resist tipping over.

The invention relates to a construction materials flammable testing device, specifically to a flammability indicator test device to detect building materials burning time, flame height and 45degree tilt burning status, which belongs to the building materials testing device technology field. The invention comprises a box with a door, the sample fixture structure installed in the box, and the burning structure, the burning structure including the burner and the burner rotating structure, and the sample fixture structure including the vertical bar structure, the horizontal bar structure, and a sample hanging structure. The invention avoids the flame tempering phenomenon of the burner and overcomes the in-equable problem of the combustion and ignition location, and the construction materials flammable testing device of the invention can achieve flame conditioning, flame height adjustment, flame color adjust, and the burner can flexibly rotate at 0degree-45degree angle, and automatic ignite.

The invention discloses a system for stimulating gas station flowing fire accidents. The system comprises a cement tank, a temperature unit for collecting temperature data is arranged on the ground of one side of the cement tank, a first heat flow unit for collecting the heat flow data is arranged on the ground of the other side of the cement tank, and one side of the first heat flow unit is provided with a camera for obtaining the flowing fire data. One end of the cement tank is provided with a fuel introducing device for introducing fuel into the cement tank, the ground of the other end of the cement tank is provided with a second heat flow unit for collecting the heat flow data, and the camera, the temperature unit, the first heat flow unit, and the second heat flow unit are all connected to a data processing device through communication. The system can stimulate the flowing fire accidents caused by dropping or breaking of an oil gun or leakage of gasoline or diesel oil due to abnormal closing of an oil gun so as to observe the spreading speed, burning area, flame height, lasting time, temperature distribution, and radiation distribution of flowing fire, and finally the developing conditions and change rules of key parameters of flowing fire on ground and water can be obtained through the experiments.

The invention relates to the technical field of fire hazard degree evaluation, and especially relates to a pool fire flame height measurement method based on visible image processing. The method comprises the steps: collecting a flame on-site image through a CCD white-light lens; converting a color space of the flame on-site image into a YCrCb space from an RGB space, wherein the constraint conditions for flame pixel judgment are as follows: Y(x, y) > Ymean; Cr(x, y) > Crmean; Cb(x, y) < Cbmean; Y(x, y) > Cb(x, y); and Cr(x, y) > Cb (x, y). According to the invention, the method can achieve the monitoring of the flame height through collecting a visible image, achieves the comprehensive real-time on-line monitoring of the flame height, improves the monitoring accuracy, effectiveness and timeliness, brings convenience to a worker for accurately understanding the height information of the flame of an oil tank, and finally provides reliable and accurate data for the estimation of the disaster-bearing capability of the oil tank.

An acoustically variable burner system is provided, having a burner wherein the flow of gas thereto, and consequently the flame pattern resulting from the ignition of the gas, is variable by transmission of acoustic waves therethrough via an acoustically-based control system. The preferred burner design produces a realistic, wood-burning type flame pattern. An acoustic controller, such as an APPLE® iPod®, MP3 player, computer, etc., may be utilized to drive / control electroacoustic transducers positioned adjacent the burner, the sound waves of which are produced thereby varying the flow rate of gas to the burner gas ports, thereby varying the flame height in direct correspondence with the audio signal. Further, the flame color may be altered by introduction of flame color variant compositions exposed to the flame via a flame color variation device removably positioned adjacent the burner. The system is preferably controlled via a specialized computer program running on the acoustic controller, which enables choice of flame patterns, duration, audible audio to accompany the flame display, etc.

The invention relates to a low-NOx combustor super low in nitrogen oxide emission. The low-NOx combustor super low in nitrogen oxide emission comprises a refractory brick, a shell, an air inlet, venturi nozzles, an injection gas pipe and a flue gas backflow pipe; the refractory brick comprises a steady flame step on the upper portion and a hollow column body on the lower portion; the inner wall ofthe top of the steady flame step is provided with a steady flame plate; a plurality of gas guns are arranged in the axial direction of the refractory brick; each gas gun comprises a gas gun sprayinghead with a small hole formed in the top; a first flue gas backflow hole and a second flue gas backflow hole are formed in the refractory brick; the side face of each gas gun spraying head is providedwith a small hole corresponding to the first flue gas backflow hole; the inner end of the first flue gas backflow hole is provided with a guiding port; the second flue gas backflow hole is communicated with the flue gas backflow pipe; the gas guns and the second flue gas backflow hole are arranged in a spaced manner; the venturi nozzles are arranged in the refractory brick in the axial direction;injecting gas spraying heads connected with the injecting gas pipe are arranged at the bottoms of the venturi nozzles; and the flue gas backflow pipe is connected with the venturi nozzles. The low-NOx combustor super low in nitrogen oxide emission is small in flame height, compact, small in air surplus coefficient and high in heat efficiency.

The invention discloses a soot collection system for laminar flame of hydrocarbon fuel and a particle size analysis method, and belongs to the field of analysis for soot particles. The soot collectionsystem is characterized in that a collecting network is mounted on a piston rod of a cylinder, and a gas inlet pipeline and a gas outlet pipeline of the cylinder are connected with a nitrogen gas cylinder through a two-way electromagnetic valve; the two-way electromagnetic valve controls a valve core to act by a signal generator, self-locking tweezers clamping the collection network are driven torapidly get in and out of flame, and the soot particles are deposited on a copper net under the action of thermophoretic force and adsorbed by a carbon film. During analyzing, the soot particle morphology and structure are characterized by a transmission electron microscope; the particle size of basic soot particles is counted by the aid of Nano Measurer particle size analysis software, and particle diameter distribution is subjected to nonlinear fitting. According to the invention, soot particle sampling under different flame heights in millisecond-grade sampling time can be realized, morphological observation of soot growing stage can be realized, and a foundation is laid for research of overall characteristics of the soot particles.

The invention relates to the manufacturing technology of lighters, and discloses an automatic adjusting device of flame height of a lighter. The automatic adjusting device comprises a fixed base plate (1), two supporting plates (2) are arranged on two sides of the fixed base plate (1), a top plate (9) is arranged on the top portions of the two supporting plates (2) in a sliding fit mode, a flame adjusting mechanism is fixed on the top plate (9), and a turnplate clamping mechanism used for clamping a lighter (4) is arranged on the fixed base plate (1).

The invention discloses a flame height detecting device for a lighter. The device mainly comprises a base seat, a height adjustable mechanism, a flame height detecting circuit, a diaphanous cover, a microprocessor and a LCD screen. The height adjustable mechanism is vertically arranged on the base seat, and is fixed with a flame height detecting unit through a circuit board support, and the output signal of each photodiode in the flame height detecting unit is respectively inputted to the microprocessor and I / O interface lines which correspond with the photodiodes. The microprocessor interprets the voltage status of the I / O interface to obtain the flame height of the lighter, and the test result is displayed on the LCD screen. Compared with the traditional visual method, the invention has the advantages that the measuring accuracy is high, the detecting speed is fast, and the reliability is high.

The invention provides a method and device for detecting and adjusting flame height of a lighter, belonging to the field of detection equipment of lighters. The invention solves the problems that the current detection and adjustment of the flame height of the lighters have low measuring accuracy or low requirements for the detection environment and the like. The method for detecting and adjusting the flame height of the lighter comprises the following steps: A, detection: detecting the outlet gas flow of a gas outlet needle of the lighter through a flow sensor and transducing flow analog signals to a controller; B, comparison: in the controller, converting the flow analog signals into outlet gas flow values and comparing with a set value to generate a comparison difference; and C, adjustment: in the controller, converting the comparison difference into control analog signals and transmitting to a controllable motor so that the controllable motor drives an adjusting nut to rotate a corresponding angle, thereby finishing correction and adjustment once. The method is accurate and quick, has low requirements for the outside environment, can adjust the adjusting nut of the lighter through the controllable motor in real time, and improves the efficiency.

The invention discloses a slope adjustable and underlying surface adjustable small-scale flowing fire simulation experiment device and method. The device comprises a flowing groove system, an oil supply system, an overflowing oil collection system and a data acquisition system, wherein the flowing groove system comprises a rectangular flowing groove, an underlying surface, a lifting table, a supporting table, a flowing stabilizing device and an optical leveling device, the oil supply system comprises a peristaltic pump, a hose and an oil supply barrel, the overflowing oil collection system comprises an oil outlet pipe and an oil collecting barrel, and the data acquisition system comprises a thermocouple array, a first camera, a second camera, a thermal infrared imager, an electronic balance, a data conversion module and a computer. According to the invention, parameters such as spreading distance, spreading rate, temperature, flame height and the like of flowing fire can be studied, sothat the influence mechanism of bottom surface gradient and underlying surface heat loss on fire spreading speed characteristics can be studied, and favorable basis and support are provided for emergency treatment of flowing fire accidents.

The invention relates to a device capable of increasing flame height, which comprises an air intake group and a light transmitting cover, wherein the air intake group is provided with an inner wall, and the inner wall is closed; the air intake group is circlewise provided with a plurality of swirling air channels, and two ends of the air intake group are respectively provided with an air intake area and an accelerating area; the swirling air channels are communicated with the air intake area and the accelerating area, and the air intake area and the accelerating area are adjacent; the air intake area causes the swirling air channels to be open, and the accelerating area causes the swirling air channels to be closed; and the light transmitting cover is connected with the accelerating area. External air enters the swirling air channels of the accelerating area from the swirling air channels of the air intake area, and the air rotates through the swirling air channels and drives flame to rotate. When the air passes through the accelerating area, the flow of air can be accelerated, and the air quickly forms cyclone in the light transmitting cover to increase the flame height.

The invention discloses a realization method for simulating combustion flame of aviation kerosene by using combustion flame of propane, and relates to the technical field of fire safety. By analyzing a combustion characteristic of the aviation kerosene, a corresponding combustion mathematic model is built; and a model algorithm for simulating combustion of the aviation kerosene by utilizing combustion of propane is realized mainly from three aspects of heat release rate equivalence, combustion rate equivalence and flame height equivalence. The heat release rate equivalence shows that heat released in a combustion process is same, and can be represented as the harm degree of fire in the combustion process. The combustion rate equivalence shows that the fuel combustion consumption is same. The flame height equivalence shows that fire intensity of combustion is similar. The propane flow required for simulating the flame height of the aviation kerosene under a certain area is calculated according to the method; and the flame height generated by using a system for simulating a combustion state of the aviation kerosene has relatively high similarity with that of the aviation kerosene.

The invention discloses a class B1 flame-retardant single-component polyurethane foam material. The raw material of the material comprises, in parts by weight, 15-150 parts of diphenylmethane diisocyanate, 80-110 parts of mixed flame-retardant polyether polyol, 5-10 parts of flame-retardant paraffin, 5-10 parts of a 134a hydrofluoroalkane propellant, 1-5 parts of a catalyst, and 1-5 parts of a class B1 flame-retardant foaming agent, wherein a model number of the mixed flame-retardant polyether polyol is GN-ZR-260. The invention relates to the technical field of building materials. According tothe class B1 flame-retardant single-component polyurethane foam material, by using the mixed flame-retardant polyether polyol and the flame-retardant paraffin wax, an oxygen index of the single-component polyurethane foam material can be improved, a shelf life of the single-component polyurethane foam material can be prolonged, and thus the flame-retardant effect of the single-component polyurethane foam material is greatly enhanced, dimensional stability of foams is ensured, a flame height during a foam burning test is reduced, and an amount of generated smoke and an amount of generated heatare reduced, so that the long-term use of the single-component polyurethane foam material is ensured.