33results about How to "Eliminate leaks" patented technology

The invention discloses a spoken English man-machine conversation interaction training method and system, and relates to the technical field of spoken English training, spoken English audio signals of a user are monitored in real time through a microphone, and the frequency spectrum information of the audio signals is refined into each frame of spectrogram and cepstrum coefficient feature vectors by using Fourier transform and feature extraction technologies; therefore, the voice signal characteristics of the user can be completely captured; three core dimensions of semantic similarity, grammatical structure similarity and fluency are incorporated into an evaluation model, a comprehensive oral English training evaluation system is formed, a text sequence is generated by analyzing a time sequence dependency relationship through a convolutional neural network, and the oral English training evaluation model of a deep learning technology is combined, so that the oral English training evaluation accuracy is improved. According to the method, the expressions of the user in the aspects of semantics, grammar and fluency can be accurately measured, the oral training level of the user can be comprehensively judged by the system by comparing the comprehensive evaluation coefficient with the preset qualified threshold value, and a personalized learning guide is provided according to a result.

The invention provides a heat exchange plate based on multi-layer vortex turbulence and anti-channeling curved sealing, which belongs to the technical field of heat exchangers, and mainly comprises a uniform turbulence flow dispersing device, a uniform turbulence flow collecting device, a positioning flow guide device, a multi-layer vortex turbulence device consisting of spoilers and spoiler strips, and an anti-channeling curved sealing device consisting of sealing grooves and sealing strips. The heat exchanger is characterized in that multi-layer vortex and turbulence efficient heat exchange are achieved, movement is prevented, and multi-cutting-edge labyrinth sealing is achieved. Uniform turbulent flow diffusion of fluid is achieved through the uniform turbulent flow diffusion device, multi-layer vortex and turbulent flow movement of the fluid is achieved through the multi-layer vortex turbulence device, uniform turbulent flow gathering and collecting of the fluid are achieved through the uniform turbulent flow collecting device, and positioning of the heat exchange plates and flow guiding of the fluid are achieved through the positioning and flow guiding device. And the relative movement of the heat exchange plates is prevented and multi-cutting-edge labyrinth sealing is realized through the anti-channeling sealing device.

The present application discloses an electronic atomization device and an atomizer. The atomizer includes: a liquid storage tank, provided with a liquid storage cavity; a base, provided with a receiving cavity and a ventilation channel, the ventilation channel is connected to the liquid storage cavity, and the ventilation channel is formed with an air inlet port on the base, the air inlet port is located on the side wall surface of the receiving cavity, and the base is arranged in the liquid storage tank; an atomizer core is arranged in the receiving cavity, and the air inlet port faces the side wall surface of the atomizer core, and there is an air inlet gap between the air inlet port and the side wall surface of the atomizer core. In the above manner, the present application can eliminate the risk of leakage from the ventilation channel in the atomizer to the atomizer cavity.

The present invention relates to the field of nuclear power engineering, namely the placement of unsheathed fuel assemblies in a nuclear reactor core, aiming to improve the heat dissipation of fuel elements in a nuclear reactor. The nuclear reactor core comprises a hexagonal unsheathed fuel assembly having fuel elements located on a triangular grid with a spacing greater than the diameter of the fuel element cladding. The fuel elements comprise spiral spacer ribs on the cladding and are rigidly fixed in a given angular direction so that the fuel elements are in rib-to-rib contact at a height position at which the fuel elements reach the maximum fuel element cladding temperature during reactor operation. The fuel assembly is positioned in such a way that the fuel elements located on the surface of the fuel assembly form a single triangular grid with the remaining fuel elements in the core, and ensure that all the fuel elements are in rib-to-rib contact at a height position at which the highest fuel element cladding temperature is reached during reactor operation. At the same time, incorrect placement of the fuel assembly in the core is eliminated.

This utility model provides a pressure reducing valve with a quick-install pressure measuring instrument, including a pressure reducing valve body, a locking knob, and a fixed outer frame. The pressure measuring part at the front end of the pressure reducing valve body is embedded with an integrated end face, and an end face block is integrally fixed at the front end of the integrated end face. Locking threaded holes are opened on the upper and lower ends of the left and right sides of the end face block. An annular sealing groove is opened at the front end of the end face block, and a main sealing ring is embedded inside the annular sealing groove. A port tube is installed through the main sealing ring. This design solves the problems of inconvenient installation, risk of torque damage, and difficulty in disassembly and maintenance of existing threaded connection pressure reducing valves with instruments. This utility model adopts an integrated instrument interface structure of "axial quick-install self-sealing and radial locking", completely abandoning the traditional rotary threaded connection method. It uses axial magnetic positioning insertion and radial knob locking, and uses the sealing ring integrated on the valve body to achieve reliable sealing for plug-and-play use.

The invention discloses a motor air tightness testing device, and solves the problem that a test result can be obtained only through multiple times of detection or time increase due to the fact that existing detection equipment is too long in detection time. The motor air tightness testing device comprises an air tightness tester, a motor positioning assembly used for positioning a testing motor, an inflation pipeline assembly connected with the air tightness tester, and a motor outgoing line ventilation assembly communicated with a motor outgoing line of the testing motor. The air inflation pipeline assembly comprises a first air inflation pipeline connected with an air inlet of the test motor and a second air inflation pipeline connected with the motor outgoing line ventilation assembly, and the first air inflation pipeline and the second air inflation pipeline inflate the test motor in the air tightness test process of the test motor.

This utility model proposes a maintenance-free vacuum machine, comprising: a spiral central shaft and a cylinder. The central surface of the spiral central shaft has a spiral structure. The cylinder is installed in conjunction with the spiral central shaft, and the contact surfaces of the two are fitted together to ensure that no lubricating oil enters the cylinder, avoiding problems such as oil carbonization, emulsification, and contamination. There is no need to replace the filter element, add lubricating oil, or stop the machine for maintenance regularly, which greatly reduces the operation and maintenance costs. The outer periphery of the cylinder is provided with a first water-cooling jacket, which is connected to an external cooling device through cooling pipes. It is used to cool the cylinder with circulating water, keeping the operating temperature at 30-40℃, effectively slowing down component aging, extending equipment life, and eliminating the risks of high-temperature burns, lubricating oil leakage, and mechanical jamming, reducing safety hazards for operators. Exhaust gas is discharged directly without oil mist pollution. The water cooling system reduces water waste through closed-loop circulation, which meets the requirements of green manufacturing.

This invention discloses a novel electroplating method for integrated circuits, belonging to the field of semiconductor manufacturing technology. The method includes: Step 1: preparing a wafer and coating a positive photoresist layer on the wafer; Step 2: shielding the edge region of the positive photoresist layer using a shielding ring; Step 3: exposing the positive photoresist layer on the wafer, wherein the edge region is not exposed due to being shielded by the shielding ring; Step 4: developing the exposed positive photoresist layer to form a window structure on the positive photoresist layer on the wafer, while retaining the unexposed positive photoresist layer in the edge region, thereby forming a continuous region without windows in the edge region. This invention can improve the plating defects of positive photoresist at the wafer edge, enhance the quality and yield of bump fabrication and packaging, and can be applied to all bump fabrication and packaging fields.

A clutch device for a hybrid module, the hybrid module comprising an electric motor and a coupleable internal combustion engine, the clutch device comprising: a first, a second and a third sub-clutch (2, 3, 4), wherein the first sub-clutch (2) is used to connect the internal combustion engine and the second and third sub-clutches (3, 4) are used to distribute the torque introduced via the internal combustion engine or the electric motor to different transmission stages of a transmission connected downstream; and a gear (30) drivable via the electric motor and arranged adjacent to a wall (36) of a transmission housing, the gear being rotationally fixedly connected to a rotor (27), the rotor being coupled to all sub-clutches (2, 3, 4), and the gear being supported on a housing bottom (34) of the transmission housing via rolling bearings (31), wherein the housing wall (36) and the housing bottom (34) are a one-piece transmission housing component (32).

The invention is entitled "X-ray tube housing with integral heat exchanger". The invention provides an x-ray tube housing including an outer shell having a heat exchanger integrally formed thereon in an additive manufacturing process. The additive manufacturing process allows for tight tolerances regarding the structure of the housing and the internal passages of the heat exchanger to significantly reduce the size and weight of the housing. The housing also includes a fluid distribution manifold that effectively distributes a cooling fluid within the housing to more effectively provide cooling to an x-ray tube insert disposed within the housing.

The invention discloses a block chain information security transmission method based on spatiotemporal chaos, and relates to the technical field of information processing, and the method is characterized in that the method comprises the following steps: S1, constructing a chaos function obtained based on the combination of a logic function, a cosine function and an anti-cotangent function, and naming the chaos function as logic-cosine-anti-cotangent mapping, namely LCAC mapping; s2, an LCAC-CML model is obtained by combining the LCAC mapping and the coupling mapping lattice spatio-temporal chaos model; s3, constructing a password system based on the LCAC-CML model, wherein the password system comprises an information encryption algorithm and an information decryption algorithm; and S4, constructing a block chain ciphertext transmission system based on spatio-temporal chaos. The technical problem to be solved by the invention is to provide the spatial-temporal chaos-based block chain information secure transmission method, which is convenient for information secure transmission.

This invention introduces a gravity-type wharf fixed crane foundation structure and its construction method. The foundation structure includes a small caisson assembly, a riprap foundation, precast blocks, a breast wall, and a top concrete layer. The small caisson assembly is installed on the riprap foundation. Precast blocks are placed on the riprap foundation on both sides of the small caisson assembly, and a breast wall is installed on each precast block. A top concrete layer is poured on top of the small caisson assembly. The small caisson assembly includes multiple small caissons connected by the poured top concrete layer. A bottom concrete layer is provided inside each small caisson, and embedded reinforcing bars are installed within the bottom concrete layer, which is connected to the top concrete layer via the embedded reinforcing bars. Through this design, this application eliminates the problem of grout leakage caused by deformation or displacement of the formwork during concrete pouring in traditional gravity-type block wharf fixed crane foundation construction, leading to poor sealing at the joint between the formwork and the riprap foundation.

The utility model relates to a pipeline flammable and explosive gas leakage stoppage tool, which belongs to the technical field of petrochemical engineering and particularly comprises an annular supporting frame used for being sleeved on a pipeline, a sealing rod is arranged on the upper portion in the annular supporting frame, a screw hole is arranged on the lower portion in the annular supporting frame, and a fastening lead screw is arranged in the screw hole. The top of the fastening lead screw is rotatably provided with a supporting protection plate, the fastening lead screw and the sealing rod are arranged on the same straight line, the sealing rod is sleeved with a sliding sleeve, the bottom of the sealing rod is provided with flexible sealing materials, and the sealing device is simple in structure, convenient to use and capable of rapidly blocking leakage points.

The invention relates to the technical field of articulated vehicle steering, aims to solve the problems that an existing hydraulic steering system is high in energy consumption, low in precision, slow in response, insufficient in transverse rigidity, prone to causing vehicle body oscillation and the like, and discloses drive-by-wire electromechanical steering equipment and method for an articulated mining vehicle. The required torque is calculated by the data processing terminal and then is transmitted to the inverter through the CAN bus so as to drive the servo motor; the servo motor drives the enveloping worm through the planetary reduction gear, so that the turbine set is driven, and steering of the rear vehicle body of the hinged type mining vehicle relative to the front vehicle body of the hinged type mining vehicle is achieved. The system has the advantages of energy conservation, high efficiency, accurate response, high stability, fault redundancy capability, simplified structure and low maintenance cost, and the steering performance and reliability of the articulated mining vehicle under severe working conditions are remarkably improved.

The invention discloses a software design method for supporting OTA upgrade of a thermal management controller of an electric vehicle, which comprises the following steps of: firstly, electrifying / resetting an MCU, automatically loading a stack pointer and a program entry point by a hardware circuit, waiting for frequency stabilization and release of the MCU, providing takt for a bus, latching MCU start configuration, entering the program entry point x (x = A, B... N), reading an option byte [0] of an internal reserved memory, and starting the program entry point x (x = A, B... N); judging whether the partition number of the current bootstrap program is consistent with the option bytes or not, if not, skipping to a target partition number to re-enter a program entry point, if yes, entering a main program main (), determining program updating states (including resetting, updating, updating completion and updating failure), MCU hardware drive initialization and system parameter initialization according to the option byte partition number, and if not, executing the next step; and finally, entering a transaction processing cycle, and feeding a watchdog. The method is high in flashing speed, high in updating degree and good in safety, the using intelligence and convenience of the electric vehicle can be remarkably improved, and the vehicle using experience is guaranteed.

The invention discloses a sampling method and a sampling device, belongs to the technical field of liquid detection equipment, and is used for improving liquid absorption accuracy and liquid absorption efficiency. According to the main technical scheme, the sampling method comprises the following steps: S101, transferring a sampling bottle to a liquid taking station; s201, the sampling bottle is driven to move downwards by a first stroke, so that the sampling needle is inserted into the sampling bottle; s301, the sampling bottle is driven again to move downwards by a second stroke, so that the sampling bottle is compressed; s401, driving the sampling bottle to move upwards by a second stroke so as to stretch the sampling bottle; s501, the liquid level of the sampling bottle is observed, whether the liquid level reaches the preset height or not is judged, when the liquid level is lower than the preset height, the step S301 and the step S401 are executed repeatedly, and if the liquid level is higher than the preset height, the sampling bottle is driven again to move upwards by the first stroke; s601, the sampling bottle is transferred to a transmission station; and S701, conveying the sampling bottle to a designated position.

The invention relates to an electrical device (1) comprising a coil (7) arranged within a cavity (5) of a housing (3), at least one composition comprising at least one dielectric fluid, preferably a dielectric liquid, and at least one material (12) in gel form, and wherein the ratio between the maximum volume occupied by the material (12) in gel form and the total volume of the cavity (5) is less than 50%. The invention also relates to the use of a material (12) in the form of a gel for preventing and / or minimizing leaks in a composition (9) comprising at least one dielectric fluid in an electrical device (1), in particular a transformer or a capacitor.

The utility model discloses an oven with an external burner, which is characterized in that the burner is arranged at a functional opening at the lower part of an integrally formed oven body, so that air at the functional opening is heated when the burner burns, and the heated air rises to realize the temperature rise of an oven cavity; and air below the functional openings enters the functional openings under the action of air pressure so as to provide enough oxygen for the corresponding combustors, so that more sufficient combustion is ensured, and the energy conversion efficiency is improved.

The utility model provides an anti-seepage and anti-crack structure at the joint of an outer wall infilled wall and a frame structure, which relates to the field of building connecting components, and comprises a masonry infilled wall and a beam column body, a bonding plate is connected between the masonry infilled wall and the beam column body, and the bonding plate is connected with the masonry infilled wall and the beam column body. One end of the bonding plate extends out of the masonry filler wall, a steel wire mesh is arranged on the outer side of the bonding plate, and the left end of the steel wire mesh is connected with the masonry filler wall. According to the anti-seepage and anti-crack structure at the joint of the outer wall filler wall and the frame structure, the bonding plate, the waterproof roll layer and the steel wire mesh are arranged at the joint of the wall body and the beam column to form a multi-layer waterproof function, so that outer wall leakage caused at the joint of the outer wall filler wall and the frame structure is eliminated, and the waterproof performance is improved. The reinforcing component is arranged at the end of the steel wire mesh and composed of the first sleeve, the second sleeve and the rubber band, the steel wire mesh is tightly attached to the wall and the beam column, the firmness of the component is enhanced, and the anti-cracking and anti-seepage effects are enhanced.

The utility model discloses an emulsion explosive metering and adjusting integrated device for charging robot relates to tunnel blasting engineering technical field, servo motor is used as power source, and drive spiral meter runs, and the emulsion base is supplied by pressure pump through emulsion base input end, and after the metering of spiral meter, is transported to the inner tube of concentric inner and outer tube structure, and the sensitizing agent is metered and transported by the precision metering pump through sensitizing agent input end, enters the outer tube annular gap of concentric inner and outer tube structure, obtains emulsion base flow directly, without lag through "screw device rotating speed metering", and the closed loop control strategy of fusion sensitizing agent, adopts capillary hole channel to form water ring, reduces the transportation resistance of emulsion base, promotes the transportation rate, and the response time of system control density regulation is greatly promoted from the number of seconds level of traditional decentralized system to millisecond level.

The utility model discloses an energy-saving double-lining ceramic ball valve, which relates to the technical field of valves and comprises a valve body, an upper valve cover assembled on the top of the valve body, flanges mounted at the left end and the right end of the valve body, fluoroplastic liners arranged in inner cavities of the valve body and the flanges, and an outlet valve seat mounted at the small-size end in an inner hole of the fluoroplastic liners. The valve body is provided with an outlet valve seat and a large-size end, a valve body lining is installed at the large-size end, an inlet valve seat is installed in an inner hole in the right side of the valve body lining, a ball valve element is assembled between the outlet valve seat and the inlet valve seat, and the valve body is sequentially provided with an upper counter bore, an upper hole step and an upper lower hole in the direction perpendicular to the axis of the outlet valve seat and the axis of the inlet valve seat. And a lower sinking hole, a lower hole step and a lower platform upper hole are sequentially arranged below the lower platform. According to the double-lining ball valve, the double-lining sealing design is adopted, the ceramic lining plays a role in wear resistance and sealing of the first shell, the fluoroplastic lining plays a role in sealing of the second shell, more reliable corrosion resistance and shell sealing effects are achieved, and the competitiveness of the double-lining ball valve on the working condition of strong corrosion and wear is improved.

The utility model relates to the technical field of building construction, in particular to a structural heat preservation and decoration integrated external wall panel. The plate comprises a plate body, filling grooves are formed in the two sides of the plate body in the length direction of the plate body respectively, a plurality of glue injection holes communicated with the filling grooves are formed in the front side wall of the plate body from top to bottom at intervals, and a plurality of positioning holes are formed in the left side wall of the plate body on the front sides of the filling grooves from top to bottom at intervals. And a plurality of clamping holes are formed in the right side wall of the plate body corresponding to the positions of the positioning holes. The external wall panel is reasonable in structural design and convenient to install and construct, constructors can adjust the distance between the panels in the construction process, so that panel joints are prevented from being formed, the panel joints are not uniform in size, butt joint between the panels can be achieved without plastering, leakage points or cracks of the external wall panel in the later period are completely eradicated, the overall heat preservation and waterproof effects of the external wall panel are improved, and the service life of the external wall panel is prolonged. The problems in the prior art are solved.

The application discloses a composite film material for a circuit board process, a preparation method of the composite film material, and a circuit board selective hole plugging method. The composite film material comprises a metal layer, a photosensitive layer arranged on a first surface of the metal layer, and a resin bonding layer arranged on a second surface of the metal layer. The resin bonding layer comprises an alkali-soluble resin and is used for bonding with the circuit board. The application uses the strong support of the metal layer and a specific formula design of the resin bonding layer to ensure that the film material can be cleaned and removed without residues by an alkaline solvent after experiencing an extreme heat process of 150 DEG C to 220 DEG C, and the yield and surface flatness of a selective hole plugging process of a high thickness-diameter ratio circuit board are significantly improved.

The present invention belongs to the technical field of optical secure communication, and discloses a quantum key distribution system, wherein the transmitting end includes a laser, a bidirectional polarization interferometer, a first polarization beam splitter, a first photodetector, a first beam splitter, a first polarization analysis module and an adjustable attenuator, and the receiving end includes a polarization controller, a second beam splitter and a second polarization analysis module; the polarization controller is used to perform polarization compensation on the received quantum state; the second beam splitter is used to split the quantum state after polarization compensation; the second polarization analysis module is used to perform polarization measurement on the two-way quantum state components respectively. Compared with the prior art, the present invention utilizes the random phase generated by the spontaneous radiation of the laser, and by passing the optical pulse forward and backward twice through the bidirectional polarization interferometer, the entrapped state and the polarization state can be passively prepared respectively, without the need for active modulation devices, and only one laser and one interferometer are needed, which not only eliminates the side channel information leakage, but also greatly reduces the system complexity.

The incineration fly ash collecting and treating system comprises a chelating mixing mill and a collecting device, and the chelating mixing mill is provided with a first feeding port, a second feeding port and a discharging device; the collecting device is used for collecting chelate products; the force sensor A is mounted on the chelating mixing mill and is used for obtaining a weight difference delta m = m1-m2-m3, the weight of a chelating product discharged from the chelating mixing mill is m1, and the weights of incineration fly ash and a chelating agent entering the chelating mixing mill are m2 and m3 respectively. Whether the chelating mixing mill is in a normal state or not is judged according to the consistency of historical delta m, and when the chelating mixing mill works normally, the volume of the collecting device is determined according to the predicted discharging amount, namely the sum of m2 and m3. And the conditions of agglomeration adhesion, discharge port blockage and the like of chelate products in the chelation mixing mill are judged, and a collecting device is correspondingly adjusted, so that scattering and leakage caused by the fact that the discharge amount is not consistent with the expected discharge amount are avoided.

The utility model relates to the technical field of building construction, in particular to an assembly type closely-spliced external wall panel. The utility model discloses an insulation board, which comprises a board body, the board body comprises a base board, an insulation board and a veneer which are sequentially bonded into a whole, a plurality of groups of clamping grooves are symmetrically arranged on the inner walls of the base board on the left side and the right side along the height direction of the base board from top to bottom at intervals, the clamping grooves comprise limiting grooves arranged on the side walls of the base board, and fixing grooves are arranged on the inner walls of the base board corresponding to the limiting grooves. Connecting grooves communicating with the limiting grooves and the fixing grooves are formed in the inner wall of the base plate. The external wall panel is reasonable in structural design and convenient to construct and operate, constructors can timely adjust the distance between the panels along with the construction progress, so that gaps are prevented from being formed, the panels are closely spliced and connected, leakage points or cracks of the external wall panel in the later period are completely eradicated, the overall heat preservation and waterproof effects of the external wall panel are guaranteed, meanwhile, the connecting strength between the panels is improved, and the service life of the external wall panel is prolonged. Therefore, the overall stability is improved, and the problems in the prior art are solved.

The application relates to the field of special glass ceramics and surface modification coating, and discloses a high-stability glass ceramic fluorescent sheet and a preparation method thereof. The fluorescent sheet comprises a glass ceramic substrate and a sunlight control film layer which is combined on the excitation light incident side of the glass ceramic substrate; the glass ceramic substrate is composed of SiO2, Al2O3, Eu2O3, Tb4O7 and the like, and precipitates mixed crystal phases of feldspar and willemite; the sunlight control film layer is composed of Ag, TiO2, SnO2 and SiO2 which are alternately stacked; during preparation, the raw materials are melted and annealed, then nucleation and crystallization are carried out, and then the sunlight control film layer is magnetron sputtering deposited and surface modified. In the application, the inorganic crystal lattice anchoring light emitting center is used to replace the organic dye, photo fading is eliminated, the detection baseline is maintained stable, stray light is intercepted by the integrated film layer, excitation light leakage is eliminated, and the signal-to-noise ratio is improved.

The invention discloses a leakage stopper for coastal steel pipe pile construction and a grounding judgment method thereof, and the leakage stopper comprises a positioning frame which comprises two arc-shaped plates; the fixing assembly is connected with the two arc-shaped plates and used for enabling the two arc-shaped plates to tightly hold or loosen the steel pipe pile; the multiple telescopic devices are arranged on the outer side of the positioning frame at intervals; the sealing cushion layer is annular and is provided with an opening, the top of the sealing cushion layer is connected with the bottom ends of the multiple telescopic devices, and when the two arc-shaped plates tightly hold the steel pipe pile, the end faces of the two sides of the opening of the sealing cushion layer can abut against each other and be attached; the plurality of pressure monitoring devices are respectively arranged between the plurality of telescopic devices and the sealing cushion layer; the lifting device is connected with the positioning frame or the plurality of telescopic devices; the control system is connected with the multiple telescopic devices and the multiple pressure monitoring devices and used for controlling the telescopic ends of the corresponding telescopic devices to stretch out and draw back according to pressure data measured by the pressure monitoring devices. The device can actively adapt to irregular seabed terrains, and dynamic pressure regulating sealing is achieved.

The utility model relates to the field of circular mould granulation machines, in particular to a mould for a small-sized circular mould granulation machine, which comprises a circular mould main body, a plurality of penetrating circular mould holes are uniformly formed in the annular surface of the circular mould main body, and a positioning groove matched with the circular mould granulation machine is formed in the surface of one side of the circular mould main body. A plurality of first threaded holes used for fixing the circular mold body are formed in the surface of the circular mold body, and two sealing grooves used for sealing are formed in the upper side and the lower side of the annular inner side face of the circular mold body correspondingly. Compared with an old-fashioned mold, the manufacturing cost of equipment is reduced, efficiency is high during mounting and dismounting due to mutual cooperation of the first threaded hole and the positioning groove, meanwhile, a gap between the circular mold body and the material stirring disc is eliminated due to cooperation of the sealing groove and the material stirring disc, and the situations of material leakage and dust raising are reduced.

The utility model provides an electric kettle with a replaceable inner container, which comprises a kettle body, an electric kettle cover and an electric kettle cover, the inner container is detachably arranged in the mounting cavity; the kettle cover is hinged to the kettle body so as to cover the opening of the inner container; the flow guide part is arranged on the side, facing the opening of the inner container, of the kettle cover; the flow guide piece is provided with a guide part obliquely extending towards the opening of the inner container, and the extending line of the bottom end of the guide part in the gravity direction intersects with a water collecting face defined by the periphery of the opening of the inner container. By means of the electric kettle, the problem that sanitation and safety of an electric kettle in the prior art are difficult to consider at the same time is solved.