284 results about "Flameout" patented technology

The invention relates to the technical field of fuel nozzles, and discloses a hydrogen fuel nozzle head structure with a hydrogen pressure stabilizing cavity, the center of a head flow guide disc is provided with a cavity structure, the cavity structure can serve as the pressure stabilizing cavity to stabilize the pressure of injected hydrogen, and the pressure of hydrogen entering an air jet hole is stable; hydrogen and air can be mixed more uniformly; a whole circle of air jet holes are distributed in the radial direction, a whole circle of circumferential hydrogen channels are formed in the radial inner side and the radial outer side of each circle of air jet holes, each air jet hole is provided with a radial hydrogen jet hole in the vertical direction, and a multi-point direct injection structure is formed, so that the airflow speed is increased, the combustion flame stopping time is shortened, micro-mixing diffusion combustion is achieved, and the NOx emission amount is reduced. The hydrogen fuel nozzle head structure is based on the characteristic that hydrogen is wide and suitable for combustion, the lean oil flameout boundary of a combustion chamber can be widened, and the wider working range of an engine is achieved.

The invention relates to a flameout control method, system and equipment for a gas heating water heater and a medium. The gas heating water heater comprises a sealed combustion system, a Venturi mixer and a pneumatic gas valve which are sequentially communicated, and a command valve of the pneumatic gas valve is connected to an air purification bin of the sealed combustion system through an air pressure pipe. The method comprises the following steps: in a whole machine debugging stage, setting the pressure of a zero-position adjusting spring of a command valve of the pneumatic gas valve to be a negative value; in the operation stage of the water heater, whether the combustion flame is out of flame or not is determined based on the ratio of the gas flow to the air flow; the pneumatic gas valve is closed by the controller in response to a combustion flame off-flame stall. When the smoke pipe is seriously blocked, the pneumatic gas valve can be closed, so that the whole machine is shut down, and the gas heating water heater is protected.

The invention discloses an ammonia burner based on plasma catalytic ammonia cracking and zoning regulation and control, and relates to the field of aero-engine combustion chamber structures. The head is combined with a staged combustion technology and a plasma and ammonia catalytic cracking concept, and is one of effective methods for keeping the combustion chamber to work stably, reliably and effectively with low emission. Comprising a flame tube casing serving as a burner body, a first-stage swirler, a second-stage swirler and a third-stage swirler are arranged on the front portion of the flame tube casing, an ammonia gas supply nozzle is arranged in the first-stage swirler, a metal cracker is arranged on the periphery of the ammonia gas supply nozzle, and therefore a plasma discharge area is formed between the ammonia gas supply nozzle and the metal cracker; a plurality of main combustion holes and a plurality of mixing holes are formed in the middle of the side wall of the flame tube case. The stability, ignition performance and temperature uniformity of the ammonia combustor are improved, and the ammonia combustor has the advantages of being high in ignition and flameout capacity, low in emission, reliable in structure and the like and is suitable for efficient clean combustion systems in the fields of aviation, energy and the like.

The invention provides a combustion chamber which belongs to the technical field of aero-engines and comprises a flame tube head, a flame tube outer ring, a flame tube inner ring and a fuel nozzle, a sliding sleeve is arranged on the outer side of the flame tube head, and a swirler assembly is slidably mounted on the outer surface of the end, close to a flame tube, of the fuel nozzle. The sliding sleeve is installed on the outer surface of the swirler assembly in a sliding mode. A first swirler and a second swirler are arranged on the swirler assembly, an air inlet groove is formed in the sliding sleeve, and the air inlet groove is communicated with or disconnected from the second swirler. The sliding sleeve slides on the swirler assembly, so that only the first swirler can intake air when the combustion chamber flame tube is in a small state; in the large state, the air inlet groove in the sliding sleeve communicates with the second swirler, simultaneous air inlet of the first swirler and the second swirler is achieved, and therefore the contradiction between smoking in the large state and low-speed lean oil flameout in the small state in a high-oil-gas-ratio combustion chamber is solved.

The utility model discloses a handheld earth boring earth boring machine with a safety protection structure, which comprises an earth boring earth boring machine body and an earth boring bit, the earth boring earth boring machine body comprises a support, an engine, a reduction gearbox, an accelerator switch and a flameout switch, the engine, the reduction gearbox, the accelerator switch and the flameout switch are arranged on the support, and a crankshaft of the engine is connected with a centrifugal clutch used for transmitting power to the reduction gearbox. The engine is provided with an igniter, the igniter is provided with a control chip, the control chip is connected with a rotating speed sensor and a reset switch, the support is provided with a safety braking device, the safety braking device comprises a shell, a triggering piece, a braking switch and a triggering rod, and the triggering piece is arranged in the shell and can rotate relative to the shell. The trigger rod is connected with the trigger piece and can drive the trigger piece to rotate, a reset spring is arranged on the shell, and when the trigger piece is driven by the trigger rod to rotate to the position in contact with the brake switch, the brake switch is triggered to be in a switched-on state, so that the speed of an engine is reduced to an idling state, and good safety protection is achieved.

The utility model belongs to the technical field of motorcycle parts, and discloses a mechanical motorcycle flameout switch structure which comprises a shell, a fixing presser foot is arranged on the inner wall of the bottom end of the shell through a positioning bolt, a wire welding plate is arranged on the outer wall of the fixing presser foot, a fixing block is arranged on the outer wall of the wire welding plate through a reinforcing bolt, and the fixing block is arranged on the outer wall of the fixing presser foot. A gasket is in contact with the outer wall of the reinforcing bolt, a flameout button is rotationally connected to the outer wall of the fixing block, a locking mechanism is arranged on the inner wall of the flameout button, a guide telescopic rod is fixedly connected to the inner wall of the flameout button, and a positioning ball is elastically connected to the inner wall of the flameout button through a reset spring A. Through the arrangement of the flameout button, the operation of speed reduction, braking and flameout can be rapidly completed, and under the arrangement of the locking mechanism, the problem of starting and stopping of the flameout switch caused by mistaken touch can be effectively avoided, and the problem of accidents caused by mistaken touch in the driving process is avoided.

The utility model provides a safety gas valve which comprises a valve body, a gas inlet channel, a gas outlet channel, a lower installation cavity and an upper installation cavity are arranged in the valve body, a ball valve is arranged in the gas outlet channel, an electromagnetic valve assembly is arranged in the lower installation cavity, the electromagnetic valve assembly is connected with an induction device through an electric control device, and the induction device is connected with the ball valve. The upper mounting cavity is correspondingly arranged above the lower mounting cavity, a valve rod connected with the ball valve is in clearance sealing connection in the upper mounting cavity, a bouncing valve element assembly is arranged in the valve rod, and the lower end of the bouncing valve element assembly penetrates out of the ball valve and is arranged above the electromagnetic valve assembly; the gas stove is reasonable and compact in structure, circulation of the ball valve and the gas outlet channel is controlled by rotating the ball valve through the valve rod, circulation of the ball valve and the gas inlet channel is controlled through cooperation of the electromagnetic valve assembly, the induction device and the bouncing valve element assembly, gas leakage caused by misoperation under the condition that the gas stove is shut down accidentally and is unattended can be avoided, and the safety of the gas stove is improved. The use is safer.

The invention discloses a combustion optimization control system and method for a dual-fuel micro-jet engine, and relates to the technical field of dual-fuel engines, the combustion optimization control system comprises a working condition monitoring module, a fuel injection compensation control module and a fuel execution module, the fuel injection compensation control module is used for dynamically correcting fuel injection parameters based on real-time working conditions, and the fuel execution module is used for dynamically correcting fuel injection parameters based on real-time working conditions. The fuel injection compensation control module comprises an injection parameter prediction unit, a compensation amount calculation unit and an injection correction unit. According to the invention, a fuel injection compensation control module is installed, a support vector machine model is adopted to predict reference parameters and is combined with dynamic compensation of a self-adaptive controller, millisecond-level fuel injection correction is realized, in the fuel-gas mode switching process, the combustion phase offset is controlled within + / -0.8 degree CA, the rotating speed fluctuation rate is reduced to be below 5%, and the fuel-gas mode switching is realized. And the torque sudden change and flameout risks are effectively eliminated.

The application discloses a high-voltage load-tap switching device and relates to the technical field of tap switches. The high-voltage load-tap switching device comprises a switching mechanism, a driving mechanism and a recovery mechanism. The switching mechanism is used for completing tap switching of high voltage. The driving mechanism provides power for switching of the switching mechanism. In the application, the second moving contact is separated from the second static contact to generate an electric arc before the first moving contact is switched, and the arc is extinguished by triggering a pressure accumulator pump to release sulfur hexafluoride gas. The sulfur hexafluoride gas has the characteristics of cooling, ion removal and flameout prevention, and the arc is quickly extinguished to create an arcless environment for high-voltage switching of the first moving contact, thereby avoiding ablation of the contact by the arc and improving the safety of equipment operation. After the arc is extinguished, the negative pressure pump is triggered by meshing transmission of the internal gear and the rack to suck the sulfur hexafluoride gas in the left cavity into the recovery tank, so that the gas is quickly recovered. The economic loss caused by waste of the gas is reduced, the risk of equipment aging is lowered, and the service life of the equipment is prolonged.

This application claims protection for a pressure vessel, a lighter, and an ignition gun. The pressure vessel includes a gas box and a base plate. The gas box includes a gas box body and a threaded sleeve, which is housed within the gas box body and integrally injection molded with the gas box body. The threaded sleeve is used to connect to an exhaust valve. The base plate is connected and sealed to the gas box body, and a cavity is formed between the gas box body and the base plate to contain fuel. The cavity communicates with the threaded sleeve so that the exhaust valve connected to the threaded sleeve can control the release of fuel. This not only reduces the manufacturing complexity and production cost of the gas box but also ensures the accuracy of the threaded sleeve's assembly position on the gas box body, avoiding tolerance fluctuations and cracking risks between the threaded sleeve and the gas box body. This improves the sealing performance and assembly reliability of the pressure vessel, effectively solving common problems such as poor flameout and ignition failure, and providing a reliable guarantee for the performance improvement of lighters, ignition guns, and other products.

The utility model discloses a third-generation hot air anti-freezing device which comprises a fan device. The fan device comprises a combustion chamber, one end of the combustion chamber is provided with an air supply fan, and the other end is provided with a guide plate connected with a heat conduction pipe; the heat conduction pipe is connected with a heat supply device, the heat supply device comprises a main pipe, two sides of the main pipe are respectively connected with a plurality of branch pipes, the branch pipes are connected with plant planting areas, and the main pipe and the branch pipes are provided with a plurality of heat supply through holes. Remote simultaneous frost prevention and freezing prevention of a plurality of plant planting areas can be achieved, frequent moving of the fan device through a moving device is not needed, labor cost is saved, and waste of labor cost and fuel resources of re-ignition caused by flameout and waiting for cooling of the fan device in order to prevent workers from being scalded by moving the fan device during combustion is not needed. The risk of frost damage and frostbite of vegetation due to the fact that the movable fan device cannot provide heat for the vegetation area in time is also avoided; and the heat can be accurately conveyed to the vegetation area needing the heat, and heat waste is avoided.

This invention discloses a production line for assembling irregularly shaped fireworks and its assembly method. The production line, arranged sequentially along the outer cylinder's flow direction, includes an outer cylinder feeder, an outer cylinder deformation machine, a variable-pitch conveyor, and an outer cylinder fuse-setting machine. This invention overcomes the technical bias of "fuse-setting first, deformation later" in traditional automated fireworks production. It creatively uses the outer cylinder deformation machine to first convert the conventionally arranged fireworks outer cylinder into an irregularly shaped arrangement and shape it. Then, using a variable-pitch conveyor equipped with a specific variable-pitch adjustment mechanism, it smoothly transfers the irregularly shaped arrangement to the outer cylinder fuse-setting machine for drilling and fuse insertion while strictly maintaining this arrangement. The technical solution of this invention fundamentally eliminates the major safety hazards such as wear, flameout, and flashover caused by forced deformation and pulling of the fuse in traditional processes. It not only significantly improves the reliability of irregularly shaped combined fireworks but also possesses strong size compatibility and ease of changeover, greatly improving production efficiency.

The invention discloses an intelligent control method for a multi-fuel-tank fuel system of an agricultural tractor, and relates to the technical field of agricultural machinery fuel control, and the method comprises the following steps: under the control of a processor, taking an ignition switch state as a trigger: obtaining a first environment temperature during power-on, and outputting a fuel pipeline switching valve opening / closing signal in combination with the fuel quantity of a low-grade fuel tank; pre-selecting an oil path; after starting, the heating electromagnetic valve is opened and closed according to the temperature of cooling liquid, and the high-grade fuel tank is switched back based on the temperature of fuel oil, so that heating and closed-loop management of an oil path are realized; and when the power is off, taking a second environment temperature, forcibly switching to a low-grade oil way when the temperature is less than or equal to 4 DEG C, operating for a set time, and then flameout, so that the system retains low-grade fuel oil. By automatically switching fuel oil and heating control, reliable starting and economical operation of the tractor in a low-temperature environment can be ensured, low-grade fuel oil is reserved in a pipeline after flameout, and difficulty in restarting is avoided.

The invention discloses a local oil-rich ignition and flameout device and an aero-engine combustion chamber, and belongs to the technical field of aero-engine combustion chambers, the device comprises two oil gas generators arranged on the two sides of an ignition nozzle, and each oil gas generator comprises a nozzle and a cooling cover arranged on the periphery of the nozzle in a surrounding mode. The cooling cover is provided with a plurality of air inlet holes with tangential deflection angles in the circumferential direction, and the air inlet holes are used for introducing air in the outer ring channel and forming rotational flow airflow. An outlet of the nozzle extends out of the air outlet of the cooling cover, and an annular gap is formed between the outer wall of the nozzle and the inner wall of the air outlet, so that air is mixed with injected fuel oil at the outlet of the nozzle, and a stable oil-gas mixing area is generated. The injection paths of the two oil-gas generators oppositely face each other in the downstream direction of the ignition nozzle, a local oil-rich area is formed at the ignition nozzle, rapid and stable ignition can be achieved under ignition and low working conditions, the flameout risk is reduced, and the working reliability and adaptability of the combustion chamber are improved.

The invention discloses a plug valve and a gas appliance. The plug valve comprises a valve body, a valve rod, a sealing piece and a flameout protection assembly. The valve body is provided with a valve port, and the valve rod can push the sealing piece to be away from the valve port. The flameout protection assembly comprises a first thermal bimetallic strip, the first thermal bimetallic strip is provided with a first end and a second end, the first end is connected with the valve body, and the second end is connected with the sealing piece; the first thermal bimetallic strip can drive the sealing piece to be far away from the valve port when being heated to bend and deform, and the first thermal bimetallic strip can drive the sealing piece to be close to and close the valve port when being cooled to reset. When the plug valve is applied, the first thermal bimetallic strip is matched with the sealing piece, so that gas circulation can be kept during working, gas is cut off for flameout protection when flames are extinguished, and the plug valve is simple in structure.

The invention relates to the technical field of engine flameout control methods, in particular to a flameout line breakage detection protection method and system applied to garden machine.The method comprises the steps that in the full operation stage of an engine, the electrical connection state of a flameout line is continuously obtained through a controller; when the flameout line is in the open circuit state, a corresponding safety protection instruction is determined based on the current operation stage of the engine; the safety protection instruction is used for controlling the engine to enter a non-starting state or execute active flameout; executing the safety protection instruction, and synchronously triggering the instrument to carry out fault alarm; and when the safety protection instruction is to execute active flameout, the controller selects and executes a corresponding active flameout mode according to a preset engine ignition system type. The flameout line detection method has the effect of improving the defects that an existing flameout line detection mode is single in function and cannot actively intervene in protection in the driving process.

The utility model relates to a kind of fuel gasification stove with flameout protection function, it includes furnace head, oil pump, oil inlet pipeline, igniter, exhaust fan, control panel and oil vaporizer, and is equipped with ignition needle and fire detector needle on furnace head, igniter is electrically connected with ignition needle, oil pump is located on oil inlet pipeline, one end of oil inlet pipeline is communicated with the oil inlet end of oil vaporizer, the steam outlet end of oil vaporizer is communicated with furnace head, heating body and temperature probe are equipped on oil vaporizer, control panel is electrically connected with oil pump, exhaust fan, oil vaporizer, igniter, water level probe, fire detector needle, heating body and temperature probe respectively.The utility model is inducted flame by fire detector needle, to realize flameout protection, ignition unsuccessful protection, the utility model is detected the temperature in oil vaporizer by temperature probe, to realize high temperature protection and low temperature protection.Due to the above scheme, the function of the utility model fuel gasification stove is more complete, safer and more convenient to use.

A dual-premixed ammonia burner relates to the field of ammonia combustion equipment. Addressing the problems of high ignition energy, slow combustion speed, poor flame stability, and difficulty in achieving stable combustion in large proportions with ammonia, this invention employs a dual premixing structure of auxiliary fuel gas premixed with ammonia and air premixed with ammonia, combined with a three-stage coaxial air duct and a regenerative pre-combustion chamber to achieve stable combustion. The burner includes an ignition gun, a primary air regulating damper, a secondary air regulating damper, a volute-shaped air casing, a primary air annular duct, swirl vanes, an annular ammonia multi-nozzle header, a pre-combustion chamber, a tertiary air multi-nozzle annular pipe, a flame monitor, and dual ammonia and auxiliary fuel inlets. This invention allows for wide load adjustment from 30% to 100%, no flameout at low loads, high burnout rate, and low nitrogen oxide emissions. It can operate with a large proportion of ammonia or pure gas, features a reasonable structure, reliable ignition, and stable safety, and is suitable for zero-carbon retrofitting and efficient utilization of green ammonia in industrial boilers, kilns, and other thermal equipment.

The invention relates to the technical field of art burning, and discloses an art burning control method and system, a storage medium and electronic equipment, and the method comprises the steps: responding to a target time sequence formula selected by a user, and according to the start-stop time sequence and the working time length of each type of target art burning device contained in the target time sequence formula, controlling the target art burning device according to the start-stop time sequence and the working time length of each type of target art burning device; each type of target art burning device is controlled to carry out ignition or flameout operation; inputting current meteorological parameters collected in real time into the optimized RBF neural network to obtain predicted PID control parameters; and based on the predicted PID control parameters, adjusting the opening degree of an electric adjusting valve of each type of target art burning device so as to enable the flame height and the burning posture to adapt to environmental changes. The problems of manual control, fixed time sequence and difficulty in dynamic adjustment of existing art fire can be solved, dynamic adjustment of the time sequence of art fire and self-adaption of flame to environment change are realized, and the flexibility and effect of art fire control are improved.

The utility model discloses a waterproof insulating joint, which comprises a first connector, a second connector and an insulating connecting piece for connecting the first connector and the second connector, and the insulating connecting piece is provided with a first channel for conducting the first connector and the second connector. The first channel is internally provided with a one-way valve structure capable of limiting reverse flow of fluid, and the insulating connecting piece can limit direct passing of current, so that the occurrence of electric shock accidents is reduced, and the use safety is improved; a one-way valve structure capable of preventing fluid from flowing back is arranged in the first channel, and when the waterproof insulating joint is installed on the water heater, potential safety hazards or equipment damage caused by hot water flowing back can be avoided. When the waterproof insulating joint is mounted in front of or behind the gas meter, water can be prevented from flowing backwards into the gas pipe, so that water blockage in the gas pipe is avoided, and the water is also prevented from being mixed into the gas to influence the combustion efficiency of the gas and cause unstable flame or flameout.

The invention provides an engine control method, a vehicle control unit and a vehicle, and relates to the technical field of vehicle control. According to the method, an engine is not controlled under the conditions that a hand brake is pulled up and the opening degree of an accelerator is smaller than a first preset opening degree threshold value, and an accelerator pedal signal is responded through an ECU; the purposes of preventing the vehicle from suddenly moving due to mistakenly stepping on the accelerator during parking and avoiding accidents are achieved, meanwhile, when the hand brake is loosened and the brake opening degree is smaller than the preset brake opening degree threshold value, the engine is switched into the rotating speed control mode, the purposes of providing proper engine braking force and avoiding engine flameout are achieved when the vehicle is slightly braked, and the safety of the vehicle is improved. Therefore, the technical problem of engine flameout during starting of the AMT is solved, and the technical effects that vehicle jerking caused by engine flameout is avoided, and smoothness and comfort in the driving process are improved are achieved.

The invention discloses an internal combustion engine anti-corrosion method and a related device, and relates to the field of internal combustion engines, and the method comprises the following steps: when the internal combustion engine is in a flameout state, obtaining the gas moisture content of a crankcase, if the gas moisture content of the crankcase is not less than the moisture content upper limit threshold value, outputting the obtained compressed dry air into a cylinder and the crankcase at the same time to form double-path air supply, in the double-path air supply process, original air in the air cylinder and the crankcase is pumped out, and air flow is formed. According to the invention, the gas with high moisture content in the crankcase and the cylinder and easy to cause the corrosion of the internal combustion engine is replaced by the compressed dry air, that is, the internal combustion engine is subjected to air exchange, so that the moisture content of the gas in the internal combustion engine is kept at a lower level, and the risk of corrosion of all parts in the internal combustion engine can be greatly reduced; therefore, the service life of the internal combustion engine is prolonged.

The invention belongs to the technical field of gas stoves, and particularly relates to a high-power direct injection type burner. Comprising a central ejector and a central fire cover, the central ejector is provided with a central ejector pipe, the central ejector pipe comprises a first air suction contraction part, a first throat part, a first diffusion part and a conical part arranged at an outlet of the first diffusion part, a first nozzle is installed at the lower end of the central ejector pipe, and a first air inlet is further formed in the lower end of the central ejector; the center fire cover covers the upper end of the center injection pipe, the center injection pipe, the first nozzle and the center fire cover are coaxially arranged, a plurality of fire holes are formed in the top face of the center fire cover and are obliquely arranged relative to the axis, and the side wall of the center fire cover is closed. Or the other areas of the side wall of the central fire cover except for the gas outlet structure matched with ignition or flameout prevention are all closed. The invention has the advantages of large gas output, high combustion power, high heat efficiency, safe and stable combustion, sufficient combustion and no excessive smoke.

The utility model provides a gas stove panel which comprises a panel body, two burners, two stove frames and two ignition knobs, the two burners are installed on the two sides of the top of the panel body respectively, and the two stove frames are arranged outside the two burners in a sleeved mode respectively and placed on the top of the panel body. Compared with the prior art, the energy-saving stove has the advantages that the periphery of the stove head is covered with the wind shielding frame in the wind shielding assembly, the left side and the right side of the wind shielding frame are closed, and therefore small flames generated by the stove head can be shielded, and the phenomena of flameout and air leakage are avoided; according to the gas stove, external oxygen can be guaranteed to be normally conveyed into the air blocking frame, sufficient oxygen is provided for combustion of gas, and therefore the phenomenon that the gas is extinguished in the combustion process is effectively reduced, and the use safety of the gas stove is effectively improved.

The present invention provides a burner, belonging to the technical field of combustion stoves. The burner includes a burner head and a combustion plate, which includes an air inlet housing and a plurality of air mixing housings. The air inlet housing encloses to form an air inlet chamber, and each of the air mixing housings encloses to form an air mixing chamber communicating with the air inlet chamber. Among them, the plurality of air mixing housings are arranged at intervals along one side of the air inlet housing, and air outlet openings are formed on the opposite sides of any two adjacent air mixing housings. The air inlet housing is also provided with an air inlet opening; the combustion plate is connected to the air outlet openings, and the number of the combustion plates is the same as the number of the air outlet openings and they correspond one by one. The present invention effectively improves the thermal efficiency of the burner, and can also prevent cold air from directly blowing towards the combustion plate, avoiding the problem of flameout, being applicable to indoor and outdoor use, and having a wide range of applications.

The application discloses a burner, a burner assembly and a cooking stove. The burner comprises a lower plate, an upper plate arranged on the lower plate and a partition plate. The lower plate is formed with a lower channel, and the upper plate is formed with an upper channel. The partition plate is arranged between the lower plate and the upper plate and separates the lower channel from the upper channel. The burner of the application separates the lower channel and the upper channel by the partition plate, which is equivalent to separating the lower channel and the upper channel into two independent sub-burners, the cross-sectional area of each sub-burner is smaller, and therefore, the depth of the sub-burner is relatively deeper. In this way, the phenomenon that the flame enters the gas channel to burn and produce a flameout noise at the moment when the gas valve is closed can be avoided. In addition, the equivalent cross-sectional area formed by the lower channel and the upper channel does not change, and the burner can have a larger flame.

The invention belongs to the technical field of gas stoves, and discloses an efficient premixing air volume self-adaption commercial gas stove which comprises a cooking bench body, a gas system and an intelligent control system. The cooking bench body comprises a cooking bench head, a support, a cooking range and a furnace end. The fuel gas system comprises a turbocharging fan, a premixing pipe, a fuel gas one-way valve, a main fuel gas pipeline and a normal open fire fuel gas pipeline; the turbocharging fan comprises an air inlet, a fuel gas inlet, a fuel gas-air outlet and a volute, and air and fuel gas enter the fan from the inlets of the air and the fuel gas and are mixed in the volute for the first time under the action of blades of the air and the fuel gas. The premixing pipe is connected with a fan outlet and comprises a gradually-shrinking section, a sudden-expanding section and a wing-shaped fin set. The intelligent control system comprises a control electric plate and a double-flameout electromagnetic protection valve, PID closed-loop control is adopted in the system, and the opening degree of a gas valve is dynamically adjusted by monitoring the rotating speed and the air flow of the turbocharging fan in real time, so that the gas flow and the air flow are strictly matched with the preset equivalence ratio.

The utility model relates to the technical field of combustors, and discloses a three-ring combustor with flameout protection, which is provided with a combustor body, the combustor body can be provided with at least one fire ring in a always-ignited state in the use process, and the three-ring combustor comprises a first control valve and a second control valve, a flame-out protection needle is arranged in the burner body in a penetrating mode, the flame-out protection needle is located on one side of the fire ring which is always in the ignition state, the first control valve is connected with the flame-out protection needle through a first signal line, and the second control valve is connected with the flame-out protection needle through a second signal line. According to the three-ring burner, the flameout protection needle located on one side of the fire ring in the ignition state can be conveniently detected, a flameout protection switch is prevented from being accidentally started in the using process, using is more convenient, the flameout protection needle can feed signals back to the first control valve and the second control valve at the same time, and safety is higher.

The utility model relates to a loader, in particular to a loader and a constant and variable hydraulic control system thereof, which comprises a steering hydraulic system, a working hydraulic system, a control unit and an electromagnetic valve. The steering hydraulic system comprises a flow amplifying valve, a variable pump connected with the flow amplifying valve and a switching valve used for controlling the variable pump to be switched between a quantitative mode and a variable mode. The working hydraulic system comprises a distribution valve, a metering pump connected with the distribution valve and a pilot control device used for controlling the distribution valve. The electromagnetic valve is connected between the hydraulic control end of the switching valve and the pressure oil source; and the control unit is electrically connected with the electromagnetic valve and is configured to control the electromagnetic valve to enable the switching valve to be in a variable mode when the rotating speed of the engine is lower than a preset value. In the utility model, the control unit and the electromagnetic valve are arranged, the variable pump works in a variable mode when the engine is in low-speed operation, the power absorbed and consumed by the hydraulic system is reduced, and the engine is prevented from flameout.

The invention provides a pollutant spatial distribution and blow-off and tempering limit measurement method based on a flat flame burner, and relates to the technical field of combustion experiment measurement. According to the method, on the basis of a flat-flame burner, a quartz cover is arranged above the flat-flame burner to form a locally-closed space, and a long-strip-shaped measuring window is formed in the side face; an X-Y plane movable precision probe structure is arranged on the outer side of the window, so that the tip of the sampling probe can extend into a region adjacent to the flame at any coordinate point in the window plane; a camera is arranged on the outer side of the quartz cover, and a camera pixel coordinate probe physical coordinate conversion relation is established through calibration; controlling the probe to move point by point according to a preset scanning path, synchronously collecting pollutant concentration and flame images, and obtaining a pollutant two-dimensional or three-dimensional distribution field under a given working condition; parameters such as gas flow and air-fuel ratio are adjusted, the blow-off / tempering limit is approached and crossed, scanning is repeated at key nodes, and pollutant distribution characteristics in different combustion stability states are obtained.