275results about How to "Stable flow" patented technology

This invention discloses an acid cleaning fixture for a 166MHz quarter-wavelength superconducting cavity. The acid cleaning fixture comprises a large-tube side fixture, a small-tube side combined fixture, and an acid flow guiding fixture. The large-tube side fixture serves as the acid inlet or outlet of the superconducting cavity system. One end of the fixture is sealed to the large-tube flange of the superconducting cavity system, and the other end is connected to the acid cleaning equipment via a first connecting flange and a connecting pipe. The small-tube side combined fixture also serves as the acid inlet or outlet of the superconducting cavity system. One end of the fixture is sealed to the small-tube flange, the coupler flange, and the flanges of each rinsing port of the superconducting cavity system. The other end is connected to the acid cleaning equipment via a second connecting flange and a pipeline. The acid flow guiding fixture is located inside the superconducting cavity system and communicates with the large-tube side fixture. It guides the flow of acid entering the superconducting cavity system through the large-tube side fixture and balances the acid flow rate. This invention significantly improves the acid cleaning effect of the superconducting cavity and ensures smooth bubble removal.

The utility model discloses a washing machine drainage pump water inlet assembly with a self-cleaning function. The washing machine drainage pump water inlet assembly comprises a drainage pump body. A water inlet pipe is installed at the input end of the draining pump body, a filter screen ring is rotationally installed at the end, away from the draining pump body, of the water inlet pipe, and a transmission groove is formed in the outer surface of the filter screen ring; according to the sewage draining pump, impurities such as hair, fibers and paper scraps in sewage can be intercepted through the filter screen ring, the impurities are prevented from directly entering the draining pump main body through the water inlet pipe, and the draining pump main body is prevented from being damaged due to blockage of the impurities; the scraping brush can be in transmission with the inner core of the transmission groove to drive the filter screen ring to rotate between the water inlet pipe and the connecting pipe, at the moment, the scraping brush can scrape off impurities intercepted on the filter screen ring, it is prevented that too much impurities are accumulated on the filter screen ring to affect filtering and water flow passing, and therefore the impurity cleaning capacity of the drainage pump water inlet assembly is improved, and it is guaranteed that a drainage channel is unblocked; the drainage efficiency is improved, and later use of personnel is not affected.

This disclosure provides a dust collection device and cleaning equipment, belonging to the field of cleaning equipment. The dust collection device includes a dust cup, a cyclone separator, a shielding member, and a drive motor. The cyclone separator is disposed within the dust cup and has a dust discharge side and a clean air discharge side arranged opposite each other along the axial direction of the cyclone separator. The cyclone separator includes multiple cyclone cones, each of which has an exhaust passage communicating with its interior and facing the clean air discharge side. The shielding member is rotatably disposed on the clean air discharge side of the cyclone separator and configured to selectively close at least a portion of the exhaust passage during rotation. The drive motor is disposed on the dust discharge side of the cyclone separator and is drively connected to the shielding member to drive the shielding member to rotate. The dust collection device and cleaning equipment provided by this disclosure can balance separation performance, flow capacity, structural compactness, and switching reliability.

The utility model relates to computer hardware technical field discloses a set top box mainboard entity structure of optimization wiring layout, including set top box and host board, the inside installation of host board has heat abstract mechanism, heat abstract mechanism is used for the heat dissipation of host board, the top wall of machine body is provided with dust removal mechanism, dust removal mechanism is used for the dust removal of machine body, heat abstract mechanism includes micro motor, micro motor installs in the inside of host board, the output fixedly connected with pivot no.

The utility model belongs to the technical field of sterilization kettles, and particularly relates to a circulating pasteurized yoghourt sterilization kettle which comprises supporting legs and a sealing rubber ring, the sterilization kettle is fixedly installed at the tops of the supporting legs, a sealing cover plate is rotatably installed on one side of the sterilization kettle, a supporting assembly is arranged on the inner wall of the sterilization kettle, and the sealing cover plate is rotatably installed on the supporting assembly. A rotating mechanism is arranged on the inner wall of the sterilization kettle, a circulating mechanism is arranged at the bottom of the sterilization kettle, a sterilization assembly is arranged at the top of the inner wall of the sterilization kettle, a fixing assembly is arranged on the side, close to the sterilization kettle, of the sealing cover plate, and the supporting assembly comprises an arc-shaped supporting groove and a flow guide hole. Through the arrangement of the arc-shaped supporting grooves and the flow guide holes, the arc-shaped supporting grooves can provide stable supporting for the storage frame, it is guaranteed that the storage frame does not shake during rotation, and through the arrangement of the flow guide holes, pasteurized paper can smoothly flow into the water outlet to be recycled.

The utility model relates to the technical field of PVC (polyvinyl chloride) pipe fittings, and discloses a pipe fitting for preventing floor drain fault, the main body structure of the connecting pipe fitting consists of an upper end pipe, a middle section secondary drainage pipe and a lower end pipe, and the structure is precise, reasonable and easy to implement. The research and development of the anti-fault pipe fitting not only can effectively prevent drainage of the floor drain from scouring a sand-lime layer, but also can enable water of the sand-lime layer to be smoothly discharged into a sewer line, and even can effectively prevent sand-lime from falling into the sewer line to cause blockage of the sewer line when the floor drain is installed in the decoration tiling stage; the filter net basket is fixed to the inner ring of the mounting ring, impurities are further filtered out, the anti-blocking effect is enhanced, the supporting columns and the mounting ring are connected through the tightening springs, and when water flow impact or external force is applied to the pipe fitting, the supporting columns can guarantee the stability of the filter net basket and the mounting ring and maintain the filtering and drainage performance of the pipe fitting by means of telescopic buffering of the tightening springs; and the home decoration drainage requirement is comprehensively met.

The present application relates to the technical field of plunger pump, in particular to a variable stroke double cavity plunger pump, which comprises a shell and a driving motor, two delivery pipes are arranged in the shell, two groups of crankshaft assemblies are arranged on the output shaft of the driving motor, the shell is connected with the corresponding delivery pipe through the crankshaft assembly, and a first one-way valve and a second one-way valve are symmetrically arranged in the delivery pipe along the axis of the crankshaft assembly; the one-way valve comprises a reset assembly, a sealing assembly and a clamping assembly arranged in sequence from top to bottom, the sealing of the sealing assembly is realized by the elastic extension of the reset assembly and the adhesion of the clamping assembly; the sealing assembly on the first one-way valve is provided with a first negative pressure assembly, the sealing assembly on the second one-way valve is provided with a second negative pressure assembly, and the first negative pressure assembly and the second negative pressure assembly are oppositely arranged; by arranging the negative pressure disc and the connecting pipe, the stress area of the sealing ball under the negative pressure condition is increased, the opening speed is accelerated, and the fluid passing efficiency is improved.

The utility model relates to the technical field of water treatment, and discloses a novel sewage pump. Comprising a base; the sewage pump body is installed above the base through a support, a mounting cylinder is arranged on the outer side of the sewage pump body, the limiting pipe and the clamping pipe can be conveniently disassembled through the arrangement of the disassembling mechanism, the sealing ring and a third fixing screw in a matched mode, and therefore filtering grooves in the limiting pipe and the clamping pipe can be conveniently taken out; according to the sewage pump, a user can maintain and clean the sewage pump regularly more conveniently, cleanliness and smoothness in the filter tank are guaranteed, the working efficiency of the sewage pump is improved, the service life of the sewage pump is prolonged, the clamping pipe and the limiting pipe are easy to disassemble, and therefore the user can conduct simple maintenance and cleaning work by himself / herself without asking professionals for door-to-door service; therefore, the maintenance cost can be saved, and the production loss caused by shutdown maintenance can be reduced.

This utility model discloses an air-cooled dry-type transformer, including a base and a winding structure disposed on the upper end of the base, the winding structure being used to improve the heat dissipation capacity of the winding; it also includes a heat dissipation component disposed on the upper part of the base, the heat dissipation component being used to improve the heat dissipation effect, and a cover plate being provided on the upper end of the support frame. This utility model belongs to the field of transformer heat dissipation technology, specifically an air-cooled dry-type transformer.

The utility model relates to the technical field of pit and fissure sealing agent smearing, and particularly discloses a pit and fissure sealing agent extrusion coating device which comprises a main body, the main body is arranged to be a hollow cylindrical shell, and friction blocks are continuously arranged on the surface of the main body; a sliding rod is embedded in one side of the surface of the body, one side of the sliding rod is inserted into the body and connected with a rubber block, and one side of the sliding rod is connected with a connecting block. According to the extrusion coating device for the pit and ditch sealing agent, the plugging block and the connecting rope are arranged, the plugging block is pulled outwards so that the plugging block can be taken out from the interior of the feeding port, at the moment, the pit and ditch sealing agent can be added according to the discharging port, feeding of the pit and ditch sealing agent is facilitated, and the use convenience of the device is improved; when the friction block extrudes the pit and groove sealing agent, the pit and groove sealing agent flows to the outlet pipe more smoothly, residues of the sealing agent in the main body are reduced, the utilization rate of the sealing agent is increased, and waste is avoided.

The utility model discloses a water tank with constant pressure measurement function belongs to water tank technical field, aims at solving the most water outlet point of prior art is located water tank under one side of liquid level, and the position of water outlet point is fixed immovably, along with the water supply of carrying out, the liquid level in water supply water tank is constantly reduced, wherein the distance between water outlet point and liquid level will constantly reduce, lead to the water pressure of water outlet point constantly small, although the water tank usually has the water replenishing mechanism to reach the purpose of time water replenishing, but actually still can form fluctuation to the water pressure of water supply water tank, cannot realize constant pressure water supply, and the water replenishing of water tank single, every day also cannot carry out measurement statistics, thereby the actual water replenishing of subsequent management personnel cannot know water tank accurately, thereby bring the problem of influence to the judgment and overhaul of personnel. Including stainless steel water tank, the upper side of stainless steel water tank is connected with inlet pipe, and the other side below of stainless steel water tank is connected with outlet pipe.

This utility model relates to the field of cleaning equipment technology and discloses a suction-type leaf shredder, including a suction frame body with two suction nozzles. From bottom to top, each suction nozzle has a shredding mechanism, a fine shredding mechanism, a flow guiding mechanism, and an anti-fall mechanism. The shredding mechanism includes a gear motor mounted on the outside of the suction nozzle. A cutter shaft is fixedly connected to the output end of the gear motor, and the end of the cutter shaft away from the gear motor is rotatably connected to the inner wall of the suction nozzle. Multiple cutter sleeves are arranged on the outside of the cutter shaft. Through the cooperation of a compression plate and the shredding mechanism, the leaves are pre-compressed after being sucked in, effectively reducing the leaf volume and providing a more compact leaf accumulation for the subsequent shredding process. This avoids low shredding efficiency due to loose leaf volume, ensuring preliminary shaping and compaction of the leaves before entering the shredding area, and significantly improving shredding efficiency.

The utility model relates to the technical field of steam extraction flow stabilizing equipment of steam turbines, and particularly discloses a power station industrial steam extraction small-flow adjusting device which comprises a steam extraction main pipe and an adjusting pipeline, the steam extraction main pipe is communicated with the adjusting pipeline, a sunken U-shaped pipe is arranged in the middle of the adjusting pipeline, and an automatic adjusting valve is installed on a bottom pipeline of the U-shaped pipe. A filter and a drain pipe are further installed on the U-shaped pipe, the filter is located in front of the automatic regulating valve, and the drain pipe is located behind the automatic regulating valve; the design of the U-shaped pipe is adopted, steam conveyed by a low-pressure steam pipe network is collected and climbs through the U-shaped pipe, pressure relief and drainage are conducted through timing opening of the drainage pipe, air in the pipeline is discharged, the arrangement pressure and flow in the pipeline are adjusted to be more stable, and the problems of adjustment oscillation and large pressure fluctuation are avoided; an automatic regulating valve is adopted for starting control at the bottom full pipe position, the flexible regulating capacity of an energy system is improved, the resource utilization rate is increased, and economic benefits are created for companies.

This invention discloses a high-temperature molten slag granulation system coupled with cyclone heat exchange and water mist, including a granulation chamber, a high-temperature molten slag transition device disposed at the top of the granulation chamber, a granulation disc disposed inside the granulation chamber and below the high-temperature molten slag transition device, and a transmission shaft and motor for driving the rotation of the granulation disc. A slag outlet is provided at the bottom of the granulation chamber, and multiple spray nozzles are evenly arranged circumferentially on the upper part of the inner side wall of the granulation chamber. At least four tangential high-pressure air inlets are provided circumferentially below the spray nozzles on the side wall of the granulation chamber, each high-pressure air inlet being connected to a high-pressure blower. An arc-shaped guide baffle is provided on the inner side of each high-pressure air inlet. The system of this invention has a compact structure and no additional moving parts. It can adapt to different working conditions such as blast furnace slag and steel slag by only adjusting the air pressure and water volume, and has broad industrial application value.

The utility model discloses a liquid cooling plate which comprises an upper cover plate and a lower cover plate, and a main flow channel is formed between the upper cover plate and the lower cover plate; the water inlet nozzle is communicated with the water inlet of the main flow channel and is used for allowing a refrigerant to flow in; the water outlet nozzle is communicated with a water outlet, corresponding to the water inlet, of the main runner and is used for allowing a refrigerant to flow out; the heat exchange columns are arranged in the main flow channel, and the densities of the heat exchange columns in different areas in the main flow channel are different. According to the liquid cooling plate, the plurality of heat exchange columns are arranged, so that the structural strength of the liquid cooling plate can be enhanced, the contact area between a refrigerant and the flow channel wall can be increased, and the heat exchange efficiency is improved. Besides, the heat exchange columns with different densities are arranged in different areas, so that the flow distribution of the refrigerant in the flow channel can be optimized, the refrigerant is uniformly distributed, and the uniformity of the heat dissipation performance of the liquid cooling plate is improved.

The invention discloses a media terminal data management device and system, and the device comprises a supporting bottom frame, the upper end of the supporting bottom frame is fixedly connected with a protection assembly, the lower end of the supporting bottom frame is fixedly connected with a moisture-proof plate, the inner frame wall of the protection assembly is connected with a terminal data management assembly in a penetrating manner, and the protection assembly comprises a protection frame. The upper end of the protection frame is fixedly connected with cooling equipment, the lower end of the cooling equipment is fixedly connected with a communicating pipe, the communicating pipe is connected with the protection frame in a penetrating mode, the upper end of the cooling equipment is fixedly connected with a controller, the protection frame comprises a frame body, and a clamping groove is formed in the upper end of the frame body; transverse plates are fixedly connected to the inner left frame wall and the inner right frame wall of the frame body, a rubber layer is fixedly connected to the inner rear frame wall of the frame body, and the frame body is connected with a terminal data management assembly in a sleeving mode. According to the media terminal data management device and system, storage and protection of the terminal data management device body can be facilitated.

The utility model provides an automatic cleaning filter which comprises a separation pipeline and a sundry pipeline, one end of the separation pipeline is connected to the sundry pipeline, the separation pipeline is provided with a water inlet and a water outlet, water containing sundry enters the separation pipeline from the water inlet, and a sundry separation channel used for separating the sundry from the water is formed in the separation pipeline. And the separated impurities enter the impurity pipeline, and the separated water flows out from the water outlet. The filter not only can keep the flow rate of water flow stable, but also can automatically clean various types of sundries and garbage, and the sundries discharged by automatic pollution discharge are low in water content and do not need to be treated again.

The utility model belongs to the technical field of fire rescue equipment, and particularly relates to a fire rescue communication knapsack which comprises a knapsack body, the knapsack body is divided into a plurality of storage areas including a top bin and a front bin, and the top bin is located on the upper portion of the knapsack body, serves as an unmanned aerial vehicle storage area and is used for storing an unmanned aerial vehicle and unmanned aerial vehicle related accessories; the front bin is located in the front of the backpack body. The front bin is divided into a front bin middle area and front bin two-side areas; the middle area of the front bin is divided into an upper area and a lower area, and the upper area serves as a deploy and control ball storage area and is used for storing deploy and control balls and related accessories of the deploy and control balls; the lower area serves as an individual soldier equipment storage area and is used for storing individual soldier equipment and related accessories of the individual soldier equipment; the areas on the two sides of the front bin are used as sundry storage areas. The fire rescue communication backpack is compact in structure and convenient to carry, and the action efficiency of rescue workers can be effectively improved; various fire rescue communication devices can be stored in a centralized mode, and management and use are convenient.

This utility model discloses a molten glass shearing and guiding device, including a glass melting chamber with a discharge port at the bottom. A mounting block is located at the bottom of one side of the glass melting chamber, and a fixing block is mounted on the mounting block. Shearing blades are symmetrically arranged on both sides below the discharge port, each connected to a shearing arm. Each shearing arm has a vertically oriented rotating shaft at its tail end, with a rotating gear meshing at the bottom of each rotating shaft. The bottom end of the rotating shaft is located at the bottom of the fixing block. A feed hopper is located below the shearing blades, opposite the discharge port, and a guiding pipe is located at the bottom of the feed hopper, with helical rifling inside the guiding pipe. The beneficial effects of this utility model are: 1. By optimizing the heat insulation structure of the guiding device, a constant temperature of the molten glass can be maintained, preventing it from solidifying due to excessive cooling during flow, thereby ensuring the fluidity of the glass within the guiding pipe. Temperature stability helps avoid quality instability during glass bottle molding, improving product accuracy and consistency.

The utility model discloses a resin reaction kettle water vapor removing device which comprises an outer box body, a support is fixedly connected to the outer side wall of the outer box body, a reaction kettle is fixedly connected to the interior of the outer box body, a water storage cavity is formed between the reaction kettle and the outer box body, and a feeding port is formed in the top of the reaction kettle and penetrates through the outer box body. Water vapor removing mechanisms are symmetrically arranged on the left side wall and the right side wall of the reaction kettle, and a bidirectional driving device for driving the water vapor removing mechanisms to operate is arranged on the outer side of the outer box body. Through the arrangement of the water vapor removing mechanism and the bidirectional driving device, the overall operation cost of the device can be lower, a double-shaft motor is installed outside, heat dissipation is easier, and the service life of the device is prolonged; through the arrangement of the exhaust port, the steam is exhausted through the exhaust port, and the fan blades are matched, so that the air circulation between the reaction kettle and the outside is smoother, and the steam exhaust efficiency is improved.

The application relates to the technical field of water purification equipment, and provides a water outlet pipe structure of a water purifier, which comprises a water outlet pipe body, the water outlet pipe body comprises a first pipe body and a second pipe body which are communicated with each other and perpendicular to each other, water flows through the first pipe body and flows out along the pipe opening of the second pipe body, a rib is connected in the second pipe body, the central axis of the rib is in the same line with the central axis of the first pipe body, the rib extends to one side of the outlet of the second pipe body, and a spacing is left between the rib and the side wall of the second pipe body which is close to one side of the first pipe body. Based on the above, the water outlet pipe of the water purifier is leveled, and the economic burden is reduced.

The utility model discloses a mould processing device of adjustable cutting speed, including work table and cutting mechanism, the work table upper end is passed through and is set up with the drainage groove and the sliding slot, the drainage groove is set with a plurality of groups of fixed rollers in equal intervals in. The utility model discloses through servo motor no.

The utility model discloses a coal gas pressure stabilizing control device for a blast furnace coal injection and pulverizing system. A waste gas pipeline is provided with a waste gas fan, a waste gas electric regulating valve, a waste gas flowmeter and a waste gas pressure transmitter; a coal mill inlet temperature thermal resistor and a coal mill inlet pressure transmitter are arranged on the outlet pipeline; a coal gas pressure transmitter, a coal gas flowmeter and a coal gas electric control valve are arranged on the coal gas pipeline, and an outlet temperature thermocouple and an outlet pressure transmitter are further arranged on the outlet pipeline; a waste gas carbon monoxide detector and a waste gas oxygen content detector are arranged on the waste gas pipeline; and a gas pneumatic quick switching valve, a gas electric blind plate valve, a gas electric butterfly valve and a carbon monoxide heat conduction type gas analyzer are arranged on the gas pipeline, and the number of the gas electric control valves is larger than or equal to two. According to the utility model, the gas regulating valve or the bypass pipeline three-valve group is additionally arranged, so that a monitoring instrument is perfected, and the gas flow and pressure are accurately controlled.

The utility model discloses a concrete processing mixing device of centrifugal mixing, concretely relates to concrete processing technical field, including mixing barrel, the outside fixed setting of mixing barrel has the frame, the top of mixing barrel is through the setting of a plurality of material pipes, the inside setting of mixing barrel has centrifugal mechanism, and centrifugal mechanism includes the motor of fixed mounting at the top of mixing barrel, and the output fixed setting of motor has the pivot, and the surface fixed setting of pivot has the centrifuge cylinder, and the surface of centrifuge cylinder is set up a plurality of through -holes, and the surface fixed setting of pivot has a plurality of broken knives. The utility model realizes the preliminary centrifugal mixing, and broken knife can break up the big granular material, and the quality of mixing is promoted, and secondly can slide along the inner wall of mixing barrel under the centrifugal force and material movement effect, can effectively scrape off the barrel wall adhesion material, and also can mix the surrounding material, and further enhanced the uniformity and fullness of concrete mixing.

The application relates to the technical field of vehicle exhaust treatment, and provides an exhaust treatment system and a vehicle. The exhaust treatment system comprises a particle trap and a regeneration device, the regeneration device comprises an oil-gas mixing part, a gas path assembly and an oil path assembly, and a fluid driving part connected between the oil-gas mixing part and the particle trap, and the fluid driving part can drive an oil-gas mixture in the oil-gas mixing part to flow into the particle trap. The exhaust treatment system provided by the application sets one fluid driving part, which can facilitate the smooth flow of exhaust gas and fuel into the oil-gas mixing part, the exhaust treatment system has a simple structure, and the oil-gas mixture can smoothly flow to the downstream, which is helpful for the combustion regeneration of the particle trap, has a good exhaust treatment effect, and can reduce the emission of pollutants.

The utility model discloses a water -based paint spraying hanger, including main body mechanism, baffle mechanism and temperature rise mechanism, the main body mechanism includes mobile base, the vertical support of connecting in the middle part of mobile base upper surface, install the support pole in the middle part of vertical support, connect the hanger of support pole top, the card post of inserting in the hanger, connect the hook of card post bottom end. In the utility model, utilize the fan to produce wind power, and through the buffer of cloth wind box, make the wind power through the blast pipe from the steady blowing of air outlet to the inner side of the protective plate, and utilize the air return of air return groove, make the air in the inside of protective plate form the stable flow, thereby make the paint spraying more even, will not receive the influence of the air of flow disorder, can also suck the redundant water -based paint, reduce the pollution of emission to the air, improved the environmental protection of device, in addition the temperature rise mechanism of equipping can fast drying the water -based paint after spraying, promote work efficiency.

The utility model discloses a laboratory is with aluminum alloy electrolytic polishing device relates to electrolytic polishing device technical field, include: electrolytic tank, its inside is equipped with mutually parallel arrangement's anode column and cathode column, install the board, fix in anode column bottom portion is used for clamping work piece, baffle, vertical fixed in the middle part of install the board, and one pair of flow guide curved surface is arranged to both sides symmetry, impeller subassembly, including the rotation impeller that symmetry is equipped with baffle both sides, the utility model discloses the flow guide curved surface of baffle both sides symmetry arrangement cooperates with symmetry's rotation impeller, and the electrolyte is swept when impeller rotates and is washed work piece through flow guide curved surface, makes the electrolyte can even function on work piece surface, realizes efficient polishing, the arc flow guide block that sets up can drain the electrolyte after washing, and the electrolyte more smoothly flows to electrolysis area under the guidance of guide plate, and the sinking type collection tank can collect the electrolyte after the drainage of arc flow guide block and the foreign matter generated in electrolytic process.

The utility model discloses a slide block glue feeding structure of a plastic mould, which comprises a diving gate assembly and a slide block of the mould, the diving gate assembly comprises a diving port and a runner, the runner is arranged in an upper mould of the mould, the diving port is arranged in the slide block, and when the mould is closed and the slide block enters a core, the runner is arranged in the slide block. The diving opening is communicated with a cavity of the injection mold, a connecting section is arranged between the diving opening and the runner, the end, away from the cavity, of the diving opening is communicated with the end, located in the mold, of the runner through the connecting section, and the connecting section is vertically arranged; the diving opening is obliquely arranged relative to the horizontal plane, and the included angle between the diving opening and the connecting section is an obtuse angle. According to the utility model, the arrangement of cold runners is reduced, the length of the whole runner is shortened, and the forming period is shortened, so that the efficiency is improved.

This application discloses an electric rice cooker with a metal inner lid, including a pot body, an inner pot, and a lid. The lid includes a plastic lid assembly and a metal inner lid. The metal inner lid is mounted on the plastic lid assembly and has a sealing surface that mates with the inner pot. The metal inner lid directly covers the inner pot to form a cooking cavity. A cooling device is provided inside the plastic lid assembly. The plastic lid assembly has an air inlet on the side facing the external environment. The air inlet of the cooling device is connected to the air inlet. An air duct is provided in the lid, and the air duct has an air outlet located at the rear of the rice cooker in the front-to-back direction. The cooling device generates airflow that is guided through the air duct to cool the metal inner lid, causing condensation to form on the lower surface of the metal inner lid. At least part of the condensation flows into the sealing surface to form a water seal. This improves the steam leakage problem that may occur at this joint in existing rice cookers, reduces the impact of hot airflow on the user, and enhances the user experience.

The invention discloses a tail gas treatment system, and relates to the technical field of petrochemical engineering, the tail gas treatment system comprises a raw material gas injection module, a combustion module and a waste heat recovery module, the raw material gas injection module comprises a tail gas injection branch, a factory air branch and a natural gas branch, the tail gas injection branch comprises a compressor and a first regulating valve which are connected in sequence; the factory air branch is provided with a second regulating valve; the natural gas branch is provided with a third regulating valve; the combustion module comprises a heating part and a heat exchange part, the heating part is connected with a tail gas injection branch, a factory air branch and a natural gas branch, and the heat exchange part can absorb heat generated by the heating part and transfer the heat to a heat absorption medium; the waste heat recovery module comprises a liquid injection branch, a cyclic heating branch and a steam branch. The technical scheme provided by the invention has the technical effects that the problems of incomplete combustion and insufficient utilization of a large amount of waste heat during operation of an existing combustion furnace are solved, and the purpose of efficiently and economically treating nitrogen-containing tail gas is achieved.