179 results about "Burn out" patented technology

A fusing type disengaging device of a wind power blade turbulent flow element is characterized in that a half rope ring, close to one side of a hub, of a rope is arranged in a rope winding ring groove in the outer wall of an end cover of a sleeve in a sleeving mode, a fusing assembly in the end cover is provided with a power supply device and a plurality of conducting strips, and conduction can be avoided through the elastic force of a torsional spring in a locking state; the pawl disc can rotate relative to the ratchet wheel disc to the separation position where the pawl and the ratchet are mutually blocked, at the moment, due to the fact that the conducting strips stay to the mutual contact position after rotating, the conducting parts at the two ends of the power supply device can be mutually conducted to form a heating loop, and heat of the heating loop can be transmitted to the rope winding ring groove to burn out the positioning rope. Therefore, the positioning rope can be separated from the end cover, the turbulent flow element can be reliably and efficiently separated from the wind power blade, an operator only needs to pull the traction rope at will, and the workload in the wind power blade installation process is greatly reduced.

The high-frequency welding machine workbench comprises a rack, a liquid storage tank is arranged on the rack, a liquid storage tank is arranged in the liquid storage tank, the top of the liquid storage tank is open, elastic clamping assemblies are arranged in the liquid storage tank, and the two elastic clamping assemblies distributed oppositely are used for clamping a heat exchanger shell; and the infusion pump is connected with the water tank and the liquid storage tank. The water cooling device is novel in structure, good in water cooling effect, economical and practical, the induction coil is not prone to being burnt, and welding quality of finished products is improved.

Apparatus and methods are disclosed which are capable of being used to determine filtration efficiency of a filter body even in a clean state. Methods of determining a filtration efficiency of a filter including forcing an inlet flow comprised of a gas (such as air) flow into the inlet end of the filter at a set flow rate, introducing particles such as smoke particles into the inlet flow, and optically counting the number of particles entering and exiting the filter during a sampling event, such as with diffraction based optical particle counters positioned upstream and downstream of the filter. Preferably the gas flow is a soot-free flow stream which does not load the honeycomb filter body with contaminants that need to be removed or burned out. The filter body can thus remain in an essentially clean state even after testing its filtration efficiency.

The invention discloses a waste gas purification method, and belongs to the technical field of environmental protection. The method comprises the following steps: converting nitrogen-containing substances into NOO and adding the NOO into a high-temperature non-combustion area at the tail end of a hearth or the front end of a flue in combustion equipment, wherein fuel is burnt out; nO is cracked in the region to generate active free radicals; the free radicals oxidize NO in the flue gas to generate NO, and oxidize SOO, CO and VOCs to generate oxidation products; continuously cracking the generated NOs to form chain circulation; and the oxidation product is removed in a subsequent purification system. The NOs comprise pure NOs and dimers NO (nitrogen tetroxide) thereof, and NO is decomposed into NOs to participate in the reaction at high temperature. According to the invention, by optimizing the NO adding position, collaborative purification of multiple pollutants such as NOx, SOs, CO, VOCs and the like is realized, a reducing agent does not need to be added, ammonia escape is avoided, the investment and operation cost is low, and the method is particularly suitable for treatment of high-concentration CO and VOCs flue gas in industries such as coking and the like.

This invention discloses an electric tool. This electric tool solves the problem of motor overheating and burning out during prolonged operation of electric tools in related technologies. During operation, the electric tool utilizes a closed-loop current compensation control circuit formed by the motor, current conversion module, current compensation module, vector control module, and motor drive module. The current compensation module adjusts the reference current input to the vector control module to a minimum and make it adjustable. Furthermore, the closed-loop current compensation control circuit automatically adjusts the compensation current under different loads, effectively reducing bus current and phase current, thereby reducing motor overheating and protecting the motor and electric tool from damage due to excessive or unadjustable current.

The utility model provides a purple sand kiln based on pine branch fuel. The purple sand kiln comprises a feeding assembly and a deslagging assembly. Compared with the problems that in the using process of a traditional purple sand kiln, once the situation that no person works when charging or slag removing is needed, the temperature of the kiln is unbalanced, and therefore rapid charging and rapid waste slag removing are inconvenient to achieve, the purple sand kiln has the advantages that the charging structure and the slag removing structure are arranged, and the waste slag removing efficiency is improved; pine branches in the feeding structure are poured below the furnace bottom, so that the rapid feeding effect can be achieved, meanwhile, waste residues burnt out at the furnace bottom can be removed and collected through the slag removal structure, and the purpose of rapidly removing the waste residues can be achieved.

The invention discloses a hot water circulating pump with couplings, and relates to the field of centrifugal pumps, the hot water circulating pump comprises a base, the top surface of the base is fixedly connected with a base plate, a protective cover, a first support and a pump body, and the end face of the pump body is provided with a machine seal gland. Therefore, maintenance cost is reduced, potential safety hazards are reduced, the coaxiality calibration process is simplified, repeated measurement and adjustment of the position of the motor are not needed, time and labor are saved, coaxiality can be guaranteed, overload protection can be achieved, overload burning of the motor can be avoided, safety accidents are reduced, the operation safety of the whole hot water circulation system is improved, and the service life of the hot water circulation system is prolonged. And overload protection can be adaptively changed according to the size of the motor, so that coaxiality calibration and overload protection adjustment are synchronously carried out, secondary measurement and adjustment are not needed, and the automation degree of the device is improved while time and labor are saved.

The utility model discloses an electric heating module which comprises an electric heating main body, a cavity is arranged in the electric heating main body, and an electric heating device used for heating liquid and a safety control device used for protecting the electric heating device from being burnt out due to overheating are arranged on the electric heating main body. An inlet mechanism and a discharge mechanism are arranged on the electric heating body, the inner end and the outer end of the inlet mechanism are higher than the inner surface and the outer surface of a cavity of the electric heating body respectively, and the inner end and the outer end of the discharge mechanism are higher than the inner surface and the outer surface of the cavity of the electric heating body respectively. The peripheral face of the blocking mechanism is of a cambered surface structure. The problem that dirt is easily generated and a pipeline is blocked when liquid is heated is solved, the user experience is improved, and better market competitiveness is achieved.

The utility model discloses a novel furnace body cloth wet type slag tapping gasification furnace which comprises a gasification furnace main body, a circulating water interlayer is arranged on the side face of the gasification furnace main body, a feeding hopper is arranged in the middle of the upper surface of the gasification furnace main body, a level gage is installed on the upper portion of the side face of the feeding hopper, and an auger is connected to the top of the feeding hopper. The furnace body cloth wet type deslagging gasification furnace is provided with an inner-layer and outer-layer interlayer structure, circulating water is introduced during operation, the temperature of the furnace body on one side of the hearth is effectively reduced, the furnace body is provided with an air inlet, air is blown to the air chamber through the fan, gas for gasification of raw materials in the furnace is met, air distribution is relatively uniform, deviant combustion cannot be generated, and the furnace body can be used for gasification of the raw materials in the furnace. The air pipe is cooled through circulating water in the circulating water interlayer, the temperature of an air outlet pipe opening is low, coking is not prone to occurring, and in conclusion, it can be known that the device can prevent the fire grate from slagging to block the air outlet, and the fire grate is prevented from being burnt out by high temperature.

The utility model discloses a smoking oven with adjustable smoke output, which relates to the field of aromatherapy ovens and comprises an oven body, the upper end of the oven body is provided with an opening, a smoke exhaust oven cover is detachably mounted in the opening, the bottom surface of the smoke exhaust oven cover is provided with an air supply component used for driving airflow to blow upwards, and an incense placing plate is arranged below the smoke exhaust oven cover. When the generated smoke is too large, the adjusting cover is installed on the upper surface of the smoke discharging furnace cover, at the moment, the air outlet grooves in the surfaces of the adjusting cover and the smoke discharging furnace cover are staggered, formed through holes become small, and then the smoke discharging amount is adjusted; after the incense coil is burnt out, the scraper at the lower end of the scraping rod is driven by rotating the scraping rod to abut against the surface of the incense containing plate, incense ash on the surface of the incense containing plate is scraped off, the ash is prevented from being attached to the furnace body in the whole cleaning process, the cleaning effect is clean and thorough, and practicability is improved.

The application discloses a kind of pressurized suction cooling type air float centrifugal air compressor and working method, the system includes air inlet pipeline, centrifugal impeller, exhaust volute, permanent magnet synchronous motor main shaft and shell, air float thrust disc, air float radial bearing, pressurized impeller and its air inlet pipeline, stator core and winding, fixed structure, motor cold air outlet ring cavity, suction pipeline and suction ring cavity, the main stream area and cold gas flow area structure of air float centrifugal air compressor are proposed in the application, for the problem that high-speed synchronous motor generates large amount of heat, small heat dissipation space, easy to burn out, on the basis of the main stream area and cold gas flow area structure of air float centrifugal air compressor, the technical scheme for solving pressurized cold gas and outlet suction air combination is proposed, the cold gas flow rate and flow can be maximized to ensure that the heat generated by high-speed synchronous motor design operating condition long time operation is taken out in time, to ensure the operation safety of entire unit.

The utility model provides a power supply circuit with current detection, a current detection circuit and an electronic overload protection system. The power supply circuit with current detection comprises a current sampling module, an overpower protection module and a power supply module. The power supply module is used for supplying power to the main control module according to the current on the current sampling module; and the overpower protection module is used for conducting when the current on the current sampling module exceeds a preset current threshold value so as to shunt the power supply module. According to the application, the over-power protection module is arranged, and the protection function of the over-power protection module is utilized, so that the over-power protection module can be conducted when the current on the current sampling module exceeds the preset current threshold value to shunt the power supply module, the generated heat can be reduced, the risk of burnout is reduced, and the service life is further prolonged.

The invention relates to the technical field of oil and gas drilling and production, in particular to a racking platform fingerboard lock with an overload protection function, which comprises a mounting seat, a rotating motor, a transmission shaft and a deflector rod, and the transmission shaft is rotatably arranged on the mounting seat; the rotating motor is mounted on the mounting seat and used for driving the transmission shaft to rotate; the deflector rod is connected with the transmission shaft, and a groove is formed in the mounting base and used for limiting the deflector rod to rotate within the range of 0-90 degrees; a mounting hole in clearance fit with the transmission shaft is formed in the driving lever, a channel communicated with the mounting hole is formed in the driving lever, the channel penetrates through the end face of the second end of the driving lever in the axial direction of the driving lever, a fixing part, a spring and a locking part are sequentially arranged in the channel, the fixing part applies pressure to the spring, and the pressure is transmitted to the rotating shaft through the fixing part; and locking between the transmission shaft and the driving lever is realized. When the racking platform fingerboard lock is in a closed state, even if an operator operates mistakenly, the rotating motor cannot be burnt out due to overlarge torque, and the overload protection function is achieved.

The utility model discloses a connecting terminal with an open circuit protection structure, which comprises a base, a wire pressing terminal, a split terminal, a conductive metal piece, a contact piece and an elastic piece, the wire pressing terminal is arranged on the base and used for connecting a cable, the split terminal is arranged on the base and used for connecting an insertion end, the contact piece is rotatably arranged on the base through a first rotating shaft, and the conductive metal piece is arranged on the base. One part of the conductive metal piece is electrically connected with the wire pressing terminal, and the other part of the conductive metal piece is electrically connected with the contact piece through a soft wire; one end of the elastic piece is fixedly connected with the part, far away from the split terminal, of the contact piece, the other end of the elastic piece is relatively fixed with the line pressing terminal, and the elastic piece is in a stretched state. Circuit connection can be automatically disconnected when the internal temperature of the connection terminal is too high, the connection terminal is prevented from being burnt out due to temperature rise, and circuit safety is protected.

The utility model discloses a heat exchange cooling device which comprises an exploring tube, a pushing air cylinder and a control unit, the rear end of the exploring tube is respectively provided with a cooling liquid inlet and a cooling liquid outlet, and an air cooler, a liquid storage box and a water pump are sequentially connected between the cooling liquid outlet and the cooling liquid inlet through pipelines. A flow meter and a pressure sensor are installed in the pipeline, a temperature sensor is installed in the pipeline connected with the cooling liquid outlet, and the control unit is electrically connected with the flow meter, the pressure sensor and the temperature sensor on one hand, and is electrically connected with the pushing air cylinder and a draught fan of the air cooler on the other hand. Under the abnormal condition, the exploring tube can be withdrawn from the kiln in time, so that the risk that the exploring tube is burnt out is reduced, and a gas analysis device or a hearth flame monitoring device in the exploring tube can be prevented from being damaged.

The utility model relates to the technical field of centrifugal pumps, in particular to an aluminum shell plastic-coated integrated sealing structure, which is characterized in that an O-shaped ring and a stainless steel gasket are arranged, so that liquid is prevented from flowing to a dry area, a PCBA (printed circuit board assembly) is prevented from being burnt out due to internal leakage, and the integral failure of a water pump is avoided. As long as the compression amount and the filling rate of the sealing ring meet the design requirements, internal leakage cannot be caused, and the reliability can be greatly improved; comprising an aluminum casting machine shell which is installed on a centrifugal pump. The motor further comprises a plastic part and a sealing mechanism, the plastic part is integrally arranged in the aluminum casting machine shell in an injection molding mode, and the sealing mechanism is installed on the plastic part and enhances the sealing effect.

The invention belongs to the technical field of intelligent locks, and particularly relates to a fireproof lock with a fireproof and fireproof structure, which comprises a door body, an intelligent lock is arranged on the door body, a T-shaped handle is arranged at the bottom end of a panel of the intelligent lock, and a display and keys are arranged at the top end of the panel of the intelligent lock. A square frame is fixed to the top end of a panel of the intelligent lock through a first mounting assembly, a displayer and keys are located in the square frame, one end of the square frame is slidably connected with a sealing plate through a connecting assembly, a box body is fixed to the bottom end of the panel of the intelligent lock through a second mounting assembly, and a T-shaped handle is located in the box body. According to the intelligent lock, by arranging the square frame and the sealing plate, the panel of the intelligent lock can be prevented from being burnt out when a fire disaster occurs, the service life of the intelligent lock is prolonged, and meanwhile, under the normal condition, the panel of the intelligent lock can be protected, and the phenomena that the panel is damaged by collision and the like are avoided.

The utility model relates to electrical system technical field discloses a kind of energy storage devices, it at least includes the first shell and second shell arranged along gravity direction, and the first shell and second shell accommodate energy storage battery respectively.The first shell is equipped with first explosion venting component, and the second shell is equipped with second explosion venting component.The ratio of the communication distance between first explosion venting component and second explosion venting component and the distance of both in gravity direction is at least greater than 1.1, obstructs the transmission path of flame between first explosion venting component and second explosion venting component, avoids the flame of lower layer's explosion venting component to burn out upper layer's explosion venting component as far as possible, avoids the heat runaway of lower layer to spread to upper layer, reduces the risk of heat runaway of energy storage device spread.

The utility model provides a duplex combined temperature controller, and relates to the technical field of temperature controllers. The temperature controller comprises a mounting plate and two temperature controller single bodies, the two temperature controller single bodies are connected to the mounting plate, a client, an external power supply and the two temperature controller single bodies are connected in series, each temperature controller single body comprises a disc, and the capacitance disconnection temperatures of the two discs corresponding to the two temperature controller single bodies are different. One temperature controller single body with relatively low capacitor disconnection temperature can form a temperature controller for starting and closing, the other temperature controller single body can form a temperature controller for equipment protection, and when the temperature controller for starting and closing fails, the temperature controller for equipment protection can form final protection for equipment, so that the temperature controller for equipment protection can be effectively protected. The temperature controller is simple in structure and convenient to use, equipment is prevented from being burnt out at high temperature, damage to electronic components is reduced, the two temperature controller single bodies can be fixed at the same time in a limited installation space through the installation plate, and the space utilization rate is increased.

The utility model provides a fuel injection pump safety ignition device, the fuel injection pump comprises a nozzle connecting pipe, a connecting cavity, an electromagnetic valve and a pump seat, the nozzle connecting pipe is connected above the pump seat through the connecting cavity, the electromagnetic valve is arranged on one side of the connecting cavity, the pump seat is further provided with a liquid inlet pipeline and a liquid outlet pipeline, and the liquid inlet pipeline is communicated with the liquid outlet pipeline. A connecting block is arranged at the position, close to the top, of one side of the connecting cavity in an outward protruding mode, an oil spraying pipe is arranged in the connecting cavity, the bottom of the oil spraying pipe is connected with a pump base, the top of the oil spraying pipe is connected with a nozzle connecting pipe, and the bottom of the oil spraying pipe is connected with the pump base. The liquid outlet pipeline is communicated with the liquid inlet pipeline through the oil tank, oil introduced into the oil injection pipe upwards enters the nozzle connecting pipe, the connecting block is used for being connected with a high-pressure ignition electrode in an inserted mode and used for igniting oil sprayed out of the nozzle connecting pipe, and a fireproof plate is arranged on one side of the top of the connecting block, so that the oil injection pump body cannot be burnt out during ignition.

The secondary combustion-supporting type energy-saving stove comprises a shell, the inner wall of the shell is fixedly connected with an inner sleeve, and the bottom of a connecting base is attached to the outer wall of the inner sleeve. The utility model relates to the technical field of stoves, in particular to a secondary combustion-supporting type energy-saving stove with a detachable furnace pipe, which realizes that a furnace pipe component is detached from the inside of an inner sleeve to be replaced through the matching among a clamping column, a vertical groove and a transverse groove, and solves the problems that when the existing stove works, the furnace pipe in the traditional stove is fixedly welded in a stove body, and the furnace pipe is difficult to replace. The problems that after the stove is used for a long time, the internal furnace of the stove is easy to burn out, the burnt-out furnace cannot be maintained, the stove is scrapped, and a brand new stove needs to be replaced are solved, and the problems that a traditional stove generally does not have a secondary combustion-supporting function, combustible gas released and decomposed from coal cannot be completely combusted, and the energy consumption is low are solved. And harmful gas is discharged into the atmosphere to cause pollution.

The application discloses a sludge incineration device and method for a rotary kiln with staged air distribution and flue gas recirculation, which sends sludge and primary air into the rotary kiln from the kiln head; sends secondary air from the kiln head to the ignition section of the rotary kiln; and sends recirculated flue gas from the kiln head to the stable combustion section of the rotary kiln. The staged air distribution can form an oxygen-deficient fuel-rich zone in the initial combustion stage to inhibit the generation of NO x ; and the remaining air required for combustion is sent in the form of secondary air in the later combustion stage to make the fuel burn out; the flue gas recirculation can moderately reduce the oxygen content in the furnace and strengthen the reducing atmosphere in the combustion zone, which is beneficial to further reducing the emission of NO x in the sludge incineration process. The application uses the staged air distribution and flue gas recirculation, not only reduces the emission of NO x , but also avoids the problem that the SNCR method commonly used in the denitration of the rotary kiln incinerator needs to add ammonia water and external equipment, thereby reducing the operation cost and having good economic efficiency and application prospect.

The utility model relates to the technical field of gas station equipment, and aims to solve the technical problem of high fire risk. In order to solve the technical problem, the utility model provides the pressure vacuum valve for the exhaust pipe opening of the gasoline tank of the gasoline station. A main valve body is provided with a first channel and a second channel which are communicated with each other, and a communicating hole is formed in the connecting position of the second channel and the first channel; the positive pressure valve abuts against the top of the communicating hole. The fire extinguishing valve assembly comprises a fire extinguishing valve seat, a fire extinguishing valve rod and a fire extinguishing valve body; the fire extinguishing valve seat is connected to the top end of the main valve body; a third channel communicated with the outside is arranged in the fire extinguishing valve seat; the fire extinguishing valve rod is connected with the fire extinguishing valve seat; the fire extinguishing valve body is slidably connected to the top of the fire extinguishing valve rod. The thermosensitive assembly is connected between the top cover and the fire extinguishing valve body; in a use state, the third channel is communicated with the outside; in the fire extinguishing state, the thermosensitive assembly is burnt out, and the third channel is not communicated with the outside. The automatic fire extinguishing device can automatically extinguish fire.

The utility model discloses a temperature control protection type heater, which relates to the technical field of heaters, and comprises a heater main body and a lifting structure for assisting in lifting the heater main body, the lifting structure comprises fixing plates, the fixing plates are arranged at the front end and the rear end of the heater main body, a cavity is formed in each fixing plate, and the heating device is arranged in the cavity. And electromagnets are installed on the two sides of the interior of the cavity, a sliding rod is transversely installed between the electromagnets, two magnetic blocks are slidably connected to the outer wall of the sliding rod, and the outer wall of the sliding rod between the magnetic blocks is sleeved with a telescopic spring. Under the counter-acting force of the fixed spring, the positioning rod pushes the push plate, and under the simultaneous action of the positioning rod and the push rod, the push plate pushes downwards to drive the heater main body to ascend, so that the heater main body is pulled out of a container, and at the moment, the heater main body can be taken down to stop heating, so that heating protection of the heater is realized by the structure, and the service life of the heater is prolonged. The heater is prevented from burning out the liquid.

A coating method comprising: an electrostatic coating step of electrostatically coating a metal object supported by a metal hanger grounded to the ground; and a laser irradiation step of, after removing the object from the hanger, burning out, by laser irradiation, a coating material having adhered in the electrostatic coating step to a contact portion, said contact portion being the portion of the hanger that was in contact with the object in the electrostatic coating step.　

The utility model relates to a grate cooler capable of adjusting air supply in a partitioned mode, which comprises a shell, a fixed grate plate assembly, a movable grate plate, an air supply device and a controller, the fixed grate plate assembly comprises a plurality of fixed grate plates which are arranged in a step shape, and a plurality of first flow meters are arranged on one side of the fixed grate plate assembly. A plurality of second flow meters are arranged on the other side of the fixed grid plate assembly, the first flow meters are arranged between every two adjacent fixed grid plates, and the second flow meters are arranged between every two adjacent fixed grid plates; the air supply device is provided with a first air outlet and a second air outlet, the first air outlet is located below one side of the fixed grid plate assembly, the second air outlet is located below the other side of the fixed grid plate assembly, the first air outlet is provided with a first flow valve, and the second air outlet is provided with a second flow valve. Fine materials can be fully cooled by cooling air, the situation that the overall cooling quality of the materials is affected due to the fact that the local temperature is too high is avoided, and the fixed grid plate is prevented from being burnt out.

This invention relates to the field of silica gel recycling technology, and discloses a crushing device and recycling method for recycling waste silica silica gel. The crushing device for recycling waste silica silica gel includes a support frame and a twin-shaft crusher. A mixing mechanism is provided on the upper part of the support frame for mixing silica gel and lubricating powder. The mixing mechanism includes a mixing chamber, which is fixedly connected to the upper part of the support frame. A feed inlet is fixedly connected to the side of the mixing chamber away from the twin-shaft crusher. Multiple rollers are rotatably connected inside the mixing chamber. This invention uses the mixing mechanism to evenly coat the strip-shaped waste silica gel with lubricating powder, thereby reducing the adhesion and accumulation of silica gel on the surface of the moving blades of the twin-shaft crusher due to softening and high viscosity. This not only reduces the operating load of the motor and avoids the risk of motor overheating, tripping, or burning out, but also maintains the sharpness of the moving blade teeth, ensuring stable shearing and tearing effects and preventing excessive compression and clumping of materials.

The utility model is applicable to the technical field of hydrogen detection, and provides a hydrogen detection device with a protective structure, which comprises a hydrogen detection sensor, the lower shell is arranged at the bottom of the hydrogen detection sensor; the upper shell is arranged at the top of the lower shell; the opening and closing mechanism is installed on the inner wall of the lower shell and used for controlling opening and closing of the lower shell and the upper shell; the buffering and damping mechanism is arranged on the inner wall of the lower shell and is used for buffering and damping the hydrogen detection sensor; and the air circulation mechanism is mounted on the lower shell and is used for enabling external air to circulate in the hydrogen detection sensor. The hydrogen detection device with the protection structure provided by the scheme has a fireproof protection function, can prevent equipment from being damaged by knocking when falling to the ground, cannot burn out the hydrogen detection equipment when a detection place is on fire, can prevent dense smoke and hot air from entering the hydrogen detection equipment to cause damage, and is relatively convenient to overhaul and maintain.

The utility model belongs to the field of carbonization furnaces, and provides a carbonization furnace with double furnace return air passages, which aims to solve the problems of air passage ignition, influence on production load, gas backflow and possible flash explosion in the traditional carbonization furnace structure process, and comprises a furnace body, and a cavity in the furnace body is a carbonization chamber. The lower part of the carbonization chamber is divided into a plurality of mutually independent coke discharge ports by partition walls; an upper gas passage and a lower gas passage which are independent are respectively arranged on the partition wall and the inner wall of the furnace body corresponding to the partition wall in height, a plurality of fire holes communicated with the carbonization chamber are respectively formed in the gas passages, the gas passages comprise an air passage and a gas passage, and the air passage is arranged above the gas passage in parallel. According to the utility model, returned coal gas and returned air respectively enter the carbonization furnace from the two independent air passages, so that the problems that mixed gas of air and coal gas exists in the air passages, a lattice wall is easily burnt out, or flash explosion is caused in a pipeline and the like are solved, the temperature in the carbonization furnace can be conveniently and automatically controlled and adjusted, and the heat utilization efficiency is improved.

The invention relates to the field of railway vehicles, and provides a vehicle body chassis, a vehicle body and a railway vehicle. The vehicle body floor is located below the built-in floor, and a first air duct is arranged between the vehicle body floor and the built-in floor; and the air supply device communicates with the first air duct. The space between the interior floor and the vehicle body floor is used as the first air duct, the space under the vehicle is not occupied, and the problem that the vehicle floor structure limits air duct arrangement and affects motor cooling is solved. The inner cavity of the profile is designed to be a ventilation channel of equipment cooling air, an air channel can be naturally formed, airflow can be accurately guided, and the profile is perfectly matched with the installation environment with the limited space. The problems that a traditional vehicle body chassis is limited by the vehicle section size, a floor structure restricts air duct arrangement, the air supply cooling effect of air equipment is affected, and the risk that the working temperature of the equipment is too high or even the equipment is burnt out is easily caused are solved.