1092results about How to "Prevent leakage" patented technology

The application relates to the technical field of polished rod sealing devices of sucker rod wells, in particular to a combined intelligent adjusting flexible polished rod wellhead sealing device, which comprises an air charging sealing device clamped on a flexible polished rod; the air charging sealing device comprises an air charging and discharging pump, a hard outer wall and an annular air bag; the annular air bag is arranged between the hard outer wall and the flexible polished rod; the air charging and discharging pump is arranged outside the hard outer wall and is used for controlling air charging and discharging of the annular air bag, so that the annular air bag tightly holds or releases the flexible polished rod. The air charging and discharging of the annular air bag is controlled by the air charging and discharging pump, the tightly holding and releasing of the annular air bag to the flexible polished rod can be flexibly realized, the state can be adjusted according to actual working conditions, and the convenience and adaptability of sealing and clamping operations are improved.

The application discloses a software development package compiling method and device, and relates to the technical field of computers. A specific implementation of the method comprises the following steps: performing encapsulation based on a second programming language on a first type of module of any core component in a software development package, extracting a header file of the first type of module and a header file of a second type of module after the encapsulation to generate a common umbrella header file of the core component; and after compiling core component source code and upper layer component source code in the software development package into an executable file, processing the common umbrella header file of any core component in the software development package, so that the common umbrella header file only contains declaration content configured in advance for the core component. The implementation can effectively reduce the risk of core code leakage.

The utility model relates to metallurgical waste heat boiler technical field and disclose a kind of high-temperature ash slag removal and temporary storage device suitable for metallurgical waste heat boiler, it include: ash chute, the ash chute includes hopper body, several access doors and several spring supports, the access door is set in hopper body side wall;Floor ash bin, including ash bin body, steel flue interface and sealing door, the steel flue interface is set at the top of sealing door, the hopper body is connected with ash bin body by just flue interface, the sealing door is set in the side wall of ash bin body;Control assembly, it is jointly arranged in the inside of ash chute and floor ash bin.This scheme uses ash chute to collect high-temperature ash slag, enters floor ash bin by high-power electric hoist driving double flap valve control ash slag, realizes closed discharge, is linked and is controlled by flap valve and sealing door, effectively isolates high-temperature area before dust removal, guarantees operator and equipment safety, improves operating stability and environmental protection.

This invention discloses an underwater acoustic anti-interference transmission method and system based on sparse time-frequency feature mapping. The method includes: at the transmitting end, adaptively generating a fractional-order linear frequency-modulated waveform with a specific time-frequency shear slope based on the Doppler state of the underwater acoustic channel, achieving physical-layer focusing of transmitted energy; at the receiving end, constructing a hybrid observation model containing wide-block sparse channel components and narrow-block sparse burst noise components, and using a dual-channel variational Bayesian algorithm to jointly iteratively infer the posterior probability distribution of environmental burst noise in the fractional-order domain; finally, recovering the original signal through soft-threshold interference cancellation and fractional-order channel equalization. This invention effectively solves the communication failure problem caused by high-dynamic Doppler diffusion and marine biological impulse noise interference in underwater acoustics by actively mapping the waveform and using heterogeneous sparse joint inference at the receiving end, significantly improving transmission reliability in harsh underwater acoustic environments.

The application provides a high-sealing injection mold, and relates to the field of injection molds.The injection mold comprises an upper mold and a lower mold, the top of the upper mold is connected with a hydraulic cylinder, the lower mold is internally provided with an ejection mechanism, the edges of the cavities of the upper mold and the lower mold are respectively provided with mutually matching tapered surfaces, and a sealing strip and a sealing groove that are sealingly matched are respectively arranged on the two tapered surfaces; the tapered surface of the lower mold expands toward the outside of the cavity; the top of the upper mold is provided with an exhaust hole, and the exhaust hole is provided with an exhaust sealing structure; the bottom of the cavity of the lower mold is provided with multiple ejection holes at intervals, and the ejection holes are provided with tapered sealing sections near one end of the cavity; the ejection mechanism comprises an elastic driving assembly and multiple ejector rods connected with the elastic driving assembly, the multiple ejector rods are respectively and one-to-one correspondingly arranged in the multiple ejection holes, and one end of the ejector rod is provided with a tapered matching part matched with the tapered sealing section.The application is sealed at multiple leakage points of the mold, and has high sealing performance.

This utility model discloses a planar magnetron sputtering device belonging to the technical field of vacuum coating equipment. The device includes a motor, a main body, a target material, a cooling backplate, and a base. The core of this application lies in the fact that the cooling backplate is composed of a cooling substrate and a cover plate. The cooling substrate has a specially shaped receiving groove, which includes a first groove segment and a second groove segment connected to each other along its depth direction. The cover plate is embedded in the first groove segment to seal the lower second groove segment, thereby forming a completely closed cooling channel. This utility model, through this permanent sealing structure of embedding the cover plate in the receiving groove, replaces the traditional removable mechanical seal that relies on sealing gaskets, fundamentally solving the technical problem of leakage easily occurring in large-size cooling backplates under high water pressure.

This utility model relates to the field of ultrafiltration membrane equipment technology, and discloses an ultrafiltration membrane device for milk production, including a frame with crossbars fixedly connected to both the upper and lower ends of the frame. This ultrafiltration membrane device for milk production, through a shock-absorbing mechanism, involves first installing a shock-absorbing filter frame through the filter tube onto the inside of the crossbars when the device is to be used. A rubber shock-absorbing ring is installed in the middle of the shock-absorbing frame, which is initially fixed to the outside of the filter tube. Then, a shock-absorbing spring is installed outside the rubber shock-absorbing ring. To ensure shock absorption while protecting the filter tube, foam cotton is filled outside the shock-absorbing spring and inside the shock-absorbing frame for shock absorption protection. This effectively reduces vibration and shaking outside the filter tube, preventing the connection between the filter tube and other parts of the equipment from gradually loosening due to vibration, which could lead to milk leakage, waste of raw materials, contamination, interference with the normal operation of the ultrafiltration process, and reduced production efficiency.

This invention relates to the technical field of emulsion explosive packaging, and more particularly to a processing device for emulsion explosives. A feeding pipe is located in the middle of the machine body, connecting to an external feeding device. A mounting plate is fixedly connected to the top of the machine body, and a cylindrical block is located at the bottom of the mounting plate. The lower end of the feeding pipe passes through the cylindrical block. Symmetrical sliding blocks are provided on the mounting plate, and clamping arc blocks are slidably connected to the sliding blocks. A bidirectional threaded rod is rotatably connected to the mounting plate, and the bidirectional threaded rod is threadedly connected to the sliding blocks. A dual-axis motor is mounted on the mounting plate, and the dual-axis motor is connected to the bidirectional threaded rod. This solution effectively solves the problem of powder splashing and scattering during existing powder bagging processes, ensuring the health of operators and meeting industrial production safety and environmental protection requirements. The dual-axis motor and bidirectional threaded rod drive the clamping arc blocks to clamp the pre-made bag opening, and in conjunction with a piston rod and air cylinder, inflates the airbag block, sealing the gap between the bag opening and the cylindrical block.

The utility model discloses a kind of hysteroscope liquid leakage prevention structures, including center cylinder base, the both ends of center cylinder base are fixedly connected with end fixed ring, the outer end array of two sides the end fixed ring is fixedly connected with multiple elastic supporting pieces, and the outer end of multiple elastic supporting pieces of same side is equipped with silica gel outer cover, two sides The outer side of elastic supporting piece is fixedly connected with operating slip ring and insertion stop seat respectively, and the outer end of two sides silica gel outer cover is fixedly connected with the outer edge of corresponding side operating slip ring and insertion stop seat.In insertion, small in diameter, it is convenient to set, and will not cause damage to cervix, can effectively solve the problem of clinical surgeon encountered in hysteroscopy surgery in uterine cavity liquid leakage, reduce operation time and surgical complications, improve operation efficiency and safety.

The utility model relates to photoresist production auxiliary equipment technical field, concretely relates to an insulating carbon black storage device for photoresist, including storage box, the top of storage box is connected with feed inlet, the first solenoid valve is installed in the communication of feed inlet and storage box, the output port department of storage box bottom is provided with the second solenoid valve, still including fixed mounting on the turbine molecular pump of storage box outer side wall, the output end of turbine molecular pump is connected with the air cylinder of fixed mounting in the outer side wall of storage box, the top lift sliding of air cylinder is inserted with nitrogen tube, the output end of nitrogen tube is inserted to storage box, and is equipped with one -way exhaust valve, the utility model discloses nitrogen tube height is adjusted dynamically through lift cylinder, makes it always close carbon black material surface, and nitrogen fills the space not being occupied by material directly, and replacement efficiency improves 30% or more, and nitrogen consumption reduces 20%-40%, and turbine molecular pump provides high -purity nitrogen delivery, prevents the back flow in combination one -way exhaust valve, ensures the inert environment of fast establishment.

The utility model discloses a desulfurization reactor convenient to replace desulfurizer, and the reactor aims at solving the technical problem of reducing production efficiency and increasing maintenance cost when desulfurizer is invalid under the prior art, and needs to stop and dismount the reactor to replace. The reactor includes liquid desulfurization bucket, and the top of liquid desulfurization bucket is provided with horizontal solid desulfurization box, and the inside of horizontal solid desulfurization box is provided with two rectangular mounting boxes, and the inside of rectangular mounting box is provided with detachable dry desulfurization assembly, through setting two groups of switchable dry desulfurization assembly, cooperate rotatable rectangular sealing plate, make when replacing a group of dry desulfurization assembly, another group still can normally work, ensure that desulfurization process is uninterrupted, improve production efficiency, and the design of rectangular sealing plate ensures that the gas passage in rectangular mounting box is always in closed state in the switching process, prevents untreated flue gas leakage, guarantees desulfurization efficiency and environmental protection standard.

This utility model discloses a modular electrolytic reaction tank for preparing high-purity metallic magnesium, belonging to the field of metallic magnesium reaction tanks. It includes a reaction tank body, with a cover plate fixedly connected to the upper surface of the body by multiple bolts. A conveying pipe is fixedly connected to the left side of the upper surface of the cover plate. A collection box is fixedly connected to the right side of the lower inner surface of the reaction tank body. A through-type collection port is opened on the upper left side of the inside of the collection box. This utility model achieves efficient and rapid separation through the unique structure of the collection box and related components. When the liquid magnesium reaches a certain thickness, the level gauge detects a signal, the electric push rod is activated, pushing the sliding plate two. Through the gas box and gas delivery hole, the sliding plate one moves the baffle one upward, opening the collection port. Liquid magnesium quickly flows into the collection box, greatly reducing the residence time of liquid magnesium in the reaction tank body, effectively reducing impurity dissolution, and improving the purity of metallic magnesium and product quality.

Embodiments of the present application provide a data aggregation method, a data aggregation device, an electronic device, a chip, a storage medium and a computer program product. The method comprises: performing a desensitization aggregation operation on target data in a target database according to aggregation query configuration information to obtain a desensitized aggregation data table; wherein the aggregation query configuration information comprises: a dimension field, a metric field, a desensitization rule and an aggregation rule; the dimension field and the metric field represent the target data, the desensitization rule represents a desensitization manner of a specific field, and the aggregation rule represents an aggregation manner of a specific field.

The embodiment of the present application provides a sewage tank and a cleaning device, the sewage tank comprises a tank body and a solid-liquid separation piece, the tank body has an inlet channel, a negative pressure port, a first chamber and a second chamber, the inlet channel is used for conveying sewage to the first chamber under the action of a negative pressure source; the second chamber is communicated with the first chamber; the solid-liquid separation piece is installed in the first chamber, the solid-liquid separation piece is used for filtering solid sewage conveyed from the inlet channel into the first chamber, and liquid sewage is conveyed into the second chamber through a first communication channel. The sewage tank and the cleaning device provided by the embodiment of the present application, the ground brush is provided with the sewage tank, compared with the related art that the sewage tank is arranged on the machine body, the gravity center of the machine body can be reduced, and then the user can use conveniently. Then the loss of sewage and garbage in the transmission process can be reduced, the cleaning efficiency is improved, and it is ensured that the sewage on the surface to be cleaned can be rapidly and effectively collected.

The application discloses a packaging method of a double-face bump packaging chip, which solves the defects of easy oxidation and electric leakage of the double-face bump chip, and ensures the quality and working stability of the double-face bump packaging chip. The method is characterized in that: after the wafer front surface operation is completed, the wafer front surface is reversely arranged after being bonded with glass, then the Si surface of the wafer back surface is ground and stress is released, then a SiO2 layer is formed on the surface of the Si layer, then a Ti / Cu layer is sputtered on the surface of the SiO2 layer, then the Cu is electroplated on the surface of the Ti / Cu layer to form an electroplated Cu layer, then the RDL corresponding to the pattern is formed on the wafer back surface through photoetching, then the Ti / Cu layer etching and the adhesive removing operation are carried out through photoetching, the back surface Cu manufacturing is completed, after the back surface Cu operation is completed, the wafer back surface is treated by plasma, then the RDL surface is protected by electroplating, after being reversely arranged again, the glass and the wafer are separated by UV light, and the complete single chip is formed by mechanical cutting.

The utility model relates to the technical field of blood disease patient transplantation, and disclose a foot bath bag of paronychia, including waterproof bag, the inside of waterproof bag is equipped with soft glue frame, the top of waterproof bag is fixedly connected with additional belt, the outer wall of additional belt is sleeved with restraint band, the inside of restraint band is inserted with winding rope, the outer wall of winding rope is connected with adjusting block, the bottom of waterproof bag is connected with fixing frame. The foot bath bag of paronychy, through the cooperation setting of waterproof bag, soft glue frame and additional belt, can effectively contain iodine foot bath liquid, strictly prevent iodine liquid leakage, reduce the cleaning trouble and cross infection risk caused by liquid leakage, can accurately separate and position the patient's toes, whether it is big toe or little toe can be properly settled, ensure that iodine liquid can fully and evenly contact paronychia sick part, maximize the disinfection and treatment effect of iodine, promote the relief and recovery of paronychia symptom.

This invention relates to the field of radiation measurement technology, specifically to an authentication method for encrypted radiation measurement. It addresses the problem that existing technologies lack mechanisms to effectively shield and minimize the disclosure of sensitive information while maintaining identification efficiency, making them unsuitable for application scenarios where privacy protection demands are increasingly prominent. The method includes obtaining irradiation image data of a reference item and a test item, scaling their sizes to N×N, and denoting them as D₁ and D₂ respectively; introducing a key matrix λ; obtaining encryption matrices α₁ and α₂ through matrix multiplication of λ with D₁ and D₂ respectively; obtaining an absolute difference matrix β; obtaining a hash matrix σ; when β(i,j)>μ(i,j), setting σ(i,j) to 1, indicating that at this position, the difference between the reference item and the test item has exceeded the maximum difference, and the difference index increases by 1; when β(i,j)≤μ(i,j), setting σ(i,j) to 0, indicating that there is no difference between the two items at this position; scrambling and reducing the dimension of the hash matrix σ to obtain a hash sequence denoted as F, and using the elements of the hash sequence and H as the final difference index to accurately determine the identity or legitimacy of the test item.

The present invention relates to a filter element (30) having a filter medium (32) and a first end plate (36), the filter medium circumferentially surrounding the longitudinal axis (33) of the filter element (30), wherein the filter medium (32) is capable of being flowed from the radial outside to the radial inside, wherein the filter element (30) has a primary air passage (46) and a secondary air passage (54) preferably located at the center, wherein the filter medium (32) has an axial recess (58) on the first end side (34), and the channel (56) of the first end plate (36) forming the secondary air passage (54) extends in the axial recess. Furthermore, the present invention relates to an air filter (10) having a filter housing (12) and such filter element (30), the filter housing having an unpurified air inlet (18), a primary air outlet (20) and a secondary air outlet (22), the filter element separating the unpurified side (42) communicating with the unpurified air inlet (18) and the purified side (44) in the filter housing (12), wherein the primary air outlet (20) is connected to the purified side (44) via the primary air passage (46), and the secondary air outlet (22) is connected to the purified side (44) via the secondary air passage (54).

This disclosure relates to a risk determination method, apparatus, electronic device, and medium. The risk determination method includes: acquiring application information from an application; determining risk information of the electronic device based on the application information; and sending the risk information to the application. Since the application does not need to determine the risk information and there is no need to share information, more information from the electronic device can be combined when determining the risk information, thereby improving the accuracy of the risk information. Simultaneously, since only the risk information needs to be sent to the application, and there is no need to send information from the electronic device to the application to avoid privacy information leakage, the security of risk determination is improved.

The application discloses a kind of dike damage animal information acquisition method, system, equipment and storage medium.It includes: obtaining the authorized account information input by patrol officer, the authorized account information is checked, when checking, access permission is determined based on authorized account information;Obtain the project list corresponding to access permission, and determine target project from project list;Based on target project, obtain patrol information;The patrol information is checked, and after checking, it is stored in census database as patrol record.Through checking authorized account information to determine access permission, data access range can be accurately controlled, information leakage and disorderly operation are avoided, and system use safety is guaranteed.Through obtaining patrol information based on target project, data and project accurate binding are realized.Through checking information and storing in census database, data format is guaranteed to be standard, complete and effective, structured storage is realized, and reliable data support is provided for subsequent management analysis.

This invention relates to the field of energy storage and thermal energy storage system design technology, and particularly to a design method and product for a hot water thermal energy storage and release system used in conjunction with compressed gas energy storage. The method includes: setting boundary conditions for designing the hot water thermal energy storage and release system; calculating the constant pressure, cold tank volume, and hot tank volume; executing the thermal storage and release processes using the hot water thermal energy storage and release system, and calculating the temperature and pressure of the cold and hot tanks during the process; comparing the minimum pressure during the heat release process with the constant pressure, and recalculating or terminating the calculation based on the judgment result; storing and outputting the design parameters of the hot water thermal energy storage and release system at this time. This invention uses iterative analysis of the pressure and temperature changes of the hot water thermal energy storage and release system during operation, providing design parameters for the thermal energy storage system, preventing redundant design, saving costs, and preventing hot water vaporization due to excessively low pressure and leakage or damage to the thermal energy storage tank due to excessively high pressure, thus facilitating the safe design and operation of the thermal energy storage and release system.

The utility model relates to the technical field of coal powder sampling, disclose a flat -end coal powder sampling gun powder leakage prevention device, include: elastic sealing body and protective cover, elastic sealing body is equipped with first through -hole for sampling gun to pass through, its aperture corresponds with the outside diameter of sampling gun, makes elastic sealing body when being equipped with in sampling gun pipe outside, can be pasted with sampling gun, protective cover is horn -shaped, has the first opening of sampling mouth direction and the second opening of far from sampling mouth, first opening is greater than the second opening, elastic sealing body is detachably arranged in the protective cover, the axis line extension line of first through -hole is through first opening and second opening, when sampling, sampling gun is through first through -hole, through holding the protective cover and push to sampling mouth to extrude elastic sealing body, make its block the gap between sampling mouth and sampling gun. The device has good universality and sealing property, through extruding elastic sealing body makes it and sampling mouth close adhesion, effectively prevent coal powder leakage.

The utility model discloses lithium battery mixer rotary inner tube sealing structure relates to sealing structure technical field, including the inner tube body of setting in the inner wall of outer tube, the top of outer tube is provided with the sealing cover, the inner wall of outer tube is provided with the annular plate, in the utility model, through setting up annular plate in the inner wall of outer tube, and install first rotary axle sealing piece with inner tube body surface contact, can effectively prevent the dust, liquid and so on produced in the mixing process material leakage to the outside of outer tube, has guaranteed the clean and safety of mixing environment, has reduced raw material waste and environmental pollution, and first rotary axle sealing piece surface is provided with helical spring, and helical spring can provide certain elasticity, makes sealing piece always with inner tube body surface keep close contact, even in the case where sealing piece has certain abrasion, can guarantee better sealing effect, prolongs the service life of sealing piece, and the maintenance cost of equipment is reduced.

The application provides a capacitor parallel type controllable lightning arrester device, and relates to the technical field of lightning control, which comprises an outer box, two groups of connecting electrodes are fixedly arranged in the middle of the outer box, a lightning arrester group is arranged at the top of the connecting electrodes, and a capacitor is connected to the outside of the connecting electrodes; two groups of positioning templates are arranged, and the two groups of positioning templates are fixedly arranged on the two sides of the inside of the outer box; a slope clamping block is arranged, an automatic on-off control function is provided, the pressure in the hollow electrode strip is gradually increased through the mode of extruding gas, the lowermost air expansion rod is first entered into the lowermost partition support to support the slope clamping block, the slope clamping block is further adhered to the slope clamping block, the sliding contact block is moved, the sliding contact block moves to the positioning template, the sliding contact block is adhered to the spring contact point, the connecting electrode, the capacitor and the hollow electrode strip are connected, rapid control is realized, and the problem that the existing device cannot be gradually automatically connected through integrated unified power is solved.

The utility model relates to sealing device technical field, concretely relates to a kind of automatic sealing device of powder material sampling barrel, including adjustable height base, the upper portion of base is provided with support plate, the upper surface of support plate is provided with the sampling barrel body for receiving material, the top of sampling barrel body is detachably provided with receiving pipe, support device for fixing the height of sampling barrel body is provided between support plate and base, receiving pipe detachably arranged on the top of sampling barrel body and good sealing design, avoid the leakage of powder material in repeated sampling process, protect the environment, ensure the health of operator.

The utility model relates to the technical field of ice blender, specifically relates to a compact layout's ice blender, including box, barrel, refrigeration module and scrape ice sand module, refrigeration module includes compressor, evaporimeter and condenser through pipeline intercommunication and becomes circulating loop, compressor and condenser are installed in the box, and the evaporimeter is columnar and is arranged in the box outside vertically, the barrel opening is covered evaporimeter upwards, and the barrel is detachably connected between the box, and the bottom of barrel is equipped with the sand outlet and the sealing plug module that can open and close the sand outlet sealing, scrape ice sand module includes the scraper and the drive module located in the box outside the evaporimeter, and the drive module includes the motor, the reduction gearbox, the transmission wheel group and the support gear that are connected in proper order and are installed in the box, and the support gear is located at the evaporimeter for driving the scraper rotation. Compared with the prior art, the evaporimeter is arranged vertically, the opening of the barrel is connected with the box upwards, avoiding the problem of liquid leakage of the transverse sealing port during use, and improving the use experience.

The utility model provides a kind of multi-channel valve, it is related to valve technical field, including four-way valve body, the inside of four-way valve body is equipped with ball sleeve, the inside of ball sleeve is embedded with ball valve, the top of ball sleeve and four-way valve body is respectively provided with first round hole and second round hole, the inside of first round hole and second round hole is embedded with valve stem, the surface of valve stem and located first round hole and second round hole are embedded with first sealing ring, the top of ball valve is provided with recess.This utility model, the multi-channel valve is set by multiple sealing rings, such as first sealing ring, second sealing ring, third sealing ring etc., and sealing ball pad etc. structure, can effectively prevent fluid leakage.At the cooperation of ball sleeve, ball valve and valve body, sealing structure can adapt to the pressure change under different working conditions, ensure that valve always maintains good sealing performance in long-term use process, improve the safety and reliability of fluid delivery.

This invention provides a method and system for reconstructing the full-band electrochemical impedance spectroscopy (EIS) of lithium-ion batteries. The method includes: performing distributed relaxation time (DRT) analysis on each group of battery EIS samples to obtain DRT spectra; aligning the DRT spectra on the logarithmic time constant axis and performing ensemble statistics, selecting peaks and / or valleys that stably appear under multiple operating conditions based on statistical stability, and mapping them to obtain a set of conditionally invariant characteristic frequencies; selecting characteristic frequency points that satisfy the sampling budget from the set of conditionally invariant characteristic frequencies, and performing sparse EIS measurements on the target battery at these characteristic frequency points to obtain sparse complex impedance inputs; generating a full-band complex impedance sequence based on the sparse complex impedance inputs using an autoregressive reconstruction model; and performing battery state estimation and fault diagnosis based on the full-band complex impedance sequence. This invention significantly improves the continuity of the spectral shape and the generalization ability across operating conditions under sparse sampling conditions, while reducing the full-spectrum testing time and sampling burden.

The application relates to a rectangular furnace bottom structure in the technical field of pyrometallurgical furnace equipment, and in particular to a rectangular furnace bottom structure. The rectangular furnace bottom structure comprises, from bottom to top, a heat preservation layer, a ramming layer, a safety layer and a working layer in sequence. The lower half of the heat preservation layer is filled horizontally, the upper half of the heat preservation layer is a structure symmetrically retreating to both sides, forming an arc-shaped surface, an arc-shaped ramming layer with a high middle and a low both ends is filled above the heat preservation layer, the safety layer and the working layer are sequentially built on the ramming layer, the upper surface of the working layer is arc-shaped with a high middle and a low both ends, a molten metal copper jacket is arranged on the adjacent furnace wall of the safety layer and the working layer, and a molten metal outlet is arranged in the molten metal copper jacket. The straight surface of the furnace bottom structure is changed into an arc surface, the structural strength and stability are high, the heat preservation layer and the working layer are closely contacted, the molten body leakage is prevented, the brick body expansion can be absorbed, the construction is convenient, the cost is low, and the rectangular furnace bottom structure is suitable for furnaces of different sizes.