129results about How to "Optimized design" patented technology

A system for removing gas bubbles from blood during circulatory assist procedures. An active filter apparatus forces the bubbles to the center of the system where they are removed from the blood before the blood exits the filter.

The invention discloses a BIM-based intelligent monitoring system which comprises a GPS, a sensor module, a data acquisition module, a wireless remote transmission module, and a backstage service management module based on BIM technology. The backstage service management module based on BIM technology comprises a database, a BIM module, a GIS information module, VR, an AR module, a health monitoring module, and a display module. According to the system, the real-time monitoring of a foundation pit can be realized, the foundation pit visual display is realized through the BIM and a GIS, the combination of virtuality and reality is realized through VR and AR technology, through a health monitoring module, the early alarm and alarm of the potential risk of the foundation pit are realized through the health monitoring module, and thus the construction of the foundation pit is safely and smoothly completed.

The invention belongs to the technical field of power batteries, and especially relates to a power battery top cover and a power battery using the top cover. The power battery top cover comprises a top cover sheet, and a firs pole pillar, a second pole pillar, a pressure release valve, a liquid injection hole, pneumatic overturning sheets and a resistor block, the first pole pillar is in insulation connection with the top cover sheet, the second pole pillar is electrically connected with the top cover sheet through the resistor block, the pneumatic overturning sheets are electrically connected with the top cover sheet, the conductive block is arranged above the pneumatic overturning sheets, a baffle plate is arranged under the pressure release valve, the pneumatic overturning sheets comprise a first pneumatic overturning sheet and a second pneumatic overturning sheet, and the thickness of the first pneumatic overturning sheet is smaller than the thickness of the second pneumatic overturning sheet; and when the pressure in the power battery increases, the pneumatic overturning sheet and the second pneumatic overturning sheet sequentially move upward in order to electrically connect the first pole pillar with the second pole pillar. Compared with power battery top covers in the prior art, the power battery top cover disclosed in the invention makes the power battery have an excellent safety protection function in overcharging, nailing, short circuit and hot box test.

The present invention provides a testing circuit and a testability design method thereof for an on-chip multinuclear processor; wherein, the testing circuit comprises a testing shell register chain, a chip core connecting circuit waiting to be tested, an on-chip data path connecting circuit and a control logic circuit. The chip core connecting circuit waiting to be tested is an interconnection circuit, which is connected between the testing shell register chain and the chip core waiting to be tested. The on-chip data path connecting circuit is the interconnection circuit which is connected between the testing shell register chain and the on-chip data path. The control logic circuit controls the data flow direction of the chip core connecting circuit waiting to be tested and the on-chip data path connecting circuit. The present invention conducts an optimum design according to the characteristics of the on-chip multinuclear processor. The bandwidth of the on-chip data path is fully used. The testing cost is reduced and the amount of a transmission data packet in the on-chip data path is reduced. So an extra power spending caused by mass active data packet is greatly reduced and the testing time is greatly shortened.

The invention provides a dual-cabin combined type spacecraft combined power supply system and method; the combined power supply system comprises an ascending cabin power supply system and a landing cabin power supply system; the ascending cabin power supply system comprises a first solar cell array, a first charging diversion adjusting module, a discharge adjusting module and a storage battery pack; the landing cabin power supply system comprises a second solar cell array and a second charging diversion adjusting module; the power supply objects of the dual-cabin combined type spacecraft combined power supply system comprise each load in the spacecraft; the loads comprise a full-adjusting bus load and a non-adjusting bus load of the ascending cabin, and a full-adjusting bus load and a non-adjusting bus load of the landing cabin. The dual-cabin combined type spacecraft combined power supply system and method can ensure power supply needs in spacecraft combination flights, and can ensure power supply needs in cabin independent flight.

The invention discloses a precision detection system for a rotary transformer, which comprises the rotary transformer and a photoelectric rotary encoder, a decoder, a synchronization control circuit and an upper computer, wherein the rotary transformer and the photoelectric rotary encoder are arranged on a motor shaft, the decoder is used for outputting an excitation signal to the rotary transformer and receiving a modulation signal with rotary angle information of the rotary transformer and figuring out a rotary angle; the synchronization control circuit is used for ensuring that the rotary transformer and the photoelectric rotary encoder obtain the rotary angle at the same moment; and the upper computer is used for estimating the measurement precision of a position detection system based on the rotary transformer. According to the precision detection system for the rotary transformer, provided by the invention, measurement precision of the position detection system based on the rotary transformer when the motor is in fixed rotation speed, acceleration and deceleration processes can be more accurately estimated, defects in the design are favorably found and the design is improved. Meanwhile, the precision detection system has smaller volume and low cost as well as little influence on a device to be detected, and can be used for objectively estimating the measurement precision of the device to be detected.

The present invention discloses a Web log data mining based website optimization method. The method comprises the following steps of: acquiring Web log data, performing pre-processing on the Web log data, performing data mining on the pre-processed Web log data to obtain a user access mode set, performing screening on the user access mode set and performing optimization on a website. According to the Web log data mining based website optimization method provided by the present invention, by obtaining user access rule and mode, a structure of the website is adjusted and a page content is optimized, so that design of the website is improved and access and browsing interest of a user is improved.

The invention discloses an optimum design method of an upflow type anaerobic fermentation biological hydrogen production reactor and application of the optimum design method, and belongs to the technical field of environmental engineering. The optimum design method is used for studying internal flow regime characteristics of the reactor under different waterpower ascending velocity conditions and influences on the hydrogen production speed of the hydrogen production reactor caused by the internal flow regime characteristics on the basis of a numerical simulation method of a computational fluid mechanics technology. An Euler-Euler gas-liquid-solid three-phase fluid model is used for obtaining detailed flow field information such as a liquid phase velocity field, a solid phase volume fraction and a fermentation gas hydrogen component volume fraction, on the basis, a biochemical reaction kinetic model is coupled to carry out dynamic simulation and prediction on the hydrogen production rate of the reactor, and comprehensive analysis is carried out on different flow regime data obtained through simulation according to influences on the hydrogen production reactor caused by feedback of various flow fields so that the optimal waterpower ascending velocity can be determined. The efficient method is provided for optimal design of the upflow type anaerobic fermentation biological hydrogen production reactor. The optimum design method of the upflow type anaerobic fermentation biological hydrogen production reactor and application of the optimum design method have the advantages that technologies are mature and stable, the effect is visual, the period is short, and the cost is saved.

The invention discloses a production method of 260-330MPa low-alloy high-strength steel. The low-alloy high-strength steel comprises the following chemical components by mass percentage: 0.05-0.09% of C, 0.15-0.60% of Mn, less than or equal to 0.015% of S, less than or equal to 0.020% of P, less than or equal to 0.50% of Si, less than or equal to 0.020% of Nb, less than or equal to 0.020% of Ti, 0.020-0.060% of Als, less than or equal to 30ppm of N, and the balance of Fe and unavoidable impurities. The method comprises the procedures of hot rolling, pickling, cold rolling, box annealing, leveling and rewinding. The low-alloy high-strength steel obtained by the method has yield strength of 260-330MPa, tensile strength of 350-430MPa, percentage elongation after fracture of greater than or equal to 26.0%, and good combination of strength and plasticity. The method achieves stable production of the product via optimal design of components, and can obtain the cold rolling low-alloy high-strength steel with stable mechanical properties and good cold forming performance.

The invention discloses a pixel unit and an array substrate for a fringe switching mode liquid crystal display device. The pixel unit comprises four sub-pixel units arranged in a 2*2 array form; each sub-pixel unit comprises a pixel electrode; the pixel electrode of each sub-pixel unit, the pixel electrode of the sub-pixel unit adjacent to the former sub-pixel unit in the horizontal direction, and the pixel electrode of the sub-pixel unit adjacent to the former sub-pixel unit in the vertical direction have different domain tilting direction. The invention further provides the array substrate of the pixel unit. By the use of the pixel unit and the array substrate, the problem that cross stripes of non-uniform brightness are caused when the existing fringe switching mode liquid crystal display device is observed at a large angle of view is solved.

The invention discloses a system and method for extracting parasitic components in an analog integrated circuit layout, which is designed to mainly optimize integrated circuit design and extract the parasitic components in different manufacturing processes. The system comprises a data reading module, a layer defining module, a parasitic component extraction rule module and a parasitic component extraction module, wherein the data reading module is used for reading the data of the analog integrated circuit layout; the layer defining module is used for describing the correspondence between geometric layers and physical layers in the layout; the parasitic component extraction rule module is used for making the extraction rule of the parasitic components and generating extraction rule execution files; and the parasitic component extraction module is used for pretreating the received data output by the data reading module, operating and extracting the received data based on the layer defining module and the parasitic component extraction rule module, marking the extracted parasitic components in the analog integrated circuit layout and outputting the analog integrated circuit layout containing the parasitic components. The invention can extract the parasitic components in different manufacturing processes and provide basis for layout optimization design.

The invention discloses a gamma radioactive imaging method based on deep learning, and belongs to the fields of radiation detection technology and radioactivity monitoring. The gamma radioactive imaging method can shorten required time for gamma radiation imaging, improve the image quality, and accurately reflect purpose of radioactive spatial distribution. The method includes the steps that a Monte Carlo method is used for simulating process of coded imaging, and a sufficient number of coded image samples are obtained; coded images are processed and used as samples to train and test a deep learning network model, and design of a coded aperture collimator is optimized; a gamma radiation coded image of a detected target area is obtained by using a coded aperture gamma camera; the gamma radiation coded image is decoded and processed by using the deep learning network completed by training; a depth map and a optical image of the detected target area are obtained by using a depth vision detection system; and a decoded radiation hotspot image is fused with the depth map and the optical image, and a composite image of radioactive hotspot distribution of the detected target area is obtained.

The invention relates to a tool device applied inside a nuclear radiation site, in particular to a suspension telescopic cylinder and mechanical arm fast installing and uninstalling system under a nuclear radiation environment. The suspension telescopic cylinder and mechanical arm fast installing and uninstalling system mainly comprises a traveling crane frame, a telescopic cylinder device, a manipulator and an installing and uninstalling device. The traveling crane frame is of a large cubic frame structure and is provided with a guide rail which is connected with two opposite long sides and can horizontally move along the opposite long sides. The telescopic cylinder device mainly comprises a fixed base, a telescopic cylinder, a suspension chain, a suspension pulley and a pulley drive device. The manipulator comprises a connection part with the upper structure and the lower structure being fixed, a disc baffle and a power part. The connection part is a mechanical arm. The installing and uninstalling device is mainly composed of an installing and uninstalling butt joint mechanism and a storage clamping seat. The installing and uninstalling butt joint mechanism mainly comprises a pair of butt joint blocks which are arranged in a clamping mode and a balancing weight. By means of the overall structure of the suspension telescopic cylinder and mechanical arm fast installing and uninstalling system, the telescopic cylinder and the manipulator can be conveniently uninstalled or installed conveniently, and the purposes that the manipulator is easy to maintain and parts are easy to replace are achieved; the purpose that complex parts are efficiently and conveniently maintained through auxiliary tools is achieved.

The invention provides a semi-submersible type lifting platform ballast water system and an operation method thereof. The system comprises lower floating bodies, uprights symmetric left and right and an upper platform, wherein the upper platform is provided with a central control system. The system is characterized in that each lower floating body is internally provided with multiple ballast tanks, one lower floating body is provided with a water pump ballast system, and each ballast tank is provided with a water inflow and outflow valve and an opening communicating with a compressed air ballast system; ballast tanks are arranged in the uprights and provided with drainage valves; the water pump ballast system is provided with a sea valve connected with water inlets of the ballast tanks of the uprights through pipelines; and the compressed air ballast system, a ballast tank liquid level measurement unit, an emergency drainage control unit and a draught measurement unit are arranged in the upper platform. The operation method includes the steps that gravity water inflow and compressed air drainage of the ballast tanks in the lower floating bodies are carried out and drainage operation of the ballast tanks in the uprights and the water pump ballast system is carried out. By the adoption of the system and the operation method, a ballast water pipe system is simplified, the ballast adjusting speed is high, and the requirements for the stability of the platform and the operation safety of a crane are met.

The invention relates to an energy efficiency evaluation method for a pipe-shell-type heat exchanger. The method comprises the following steps that an energy efficiency parameter of the pipe-shell-type heat exchanger is acquired; an energy efficiency characteristic function is established by adopting the energy efficiency parameter based on net energy exchanged by the pipe-shell-type heat exchanger; an optimal overall heat transfer coefficient of the pipe-shell-type heat exchanger is determined, and an optimal energy efficiency index is obtained in combination with the energy efficiency characteristic function. According to the energy efficiency evaluation method, the optimal energy efficiency index and an energy efficiency evaluation index can be obtained, and a basis is provided for heating power design of the efficient pipe-shell-type heat exchanger.

The invention discloses a rotation type cavitation erosion and erosive wear synergistic testing apparatus. A variable frequency motor is mounted at the upper end of a bell housing; the upper end of a stirring shaft is connected with the rotating shaft of the variable frequency motor through a coupler; the lower end of the stirring shaft penetrates through an upper cover plate and a lower cover plate of a turntable to be fixed; isosceles triangular test piece mounting grooves are uniformly distributed in the positions, which are located between the upper cover plate and the lower cover plate of the turntable and are 5/6 away from the circumferential radius; basic angles of the isosceles triangular test pieces are 45 degrees each; the vertical angles of the test piece mounting grooves face up and are identical in orientation; isosceles triangular cavitation induction unit grooves with different vertical angles are uniformly distributed in the positions which are located between the upper cover plate and the lower cover plate of the turntable and are 5/6 away from the circumferential radius at the interval of 90 degrees; the vertical angles of the isosceles triangular cavitation induction unit grooves are identical in orientation, and are opposite to the orientation of the vertical angles of the test piece mounting grooves; the test pieces with the same structure are respectively mounted in the test piece mounting grooves anticlockwise in the angles of 5 degrees, 95 degrees, 185 degrees and 275 degrees. The rotation type cavitation erosion and erosive wear synergistic testing apparatus disclosed by the invention can be applied to failure analysis, wear rate test, risk inspection and service life prediction for cavitation erosion and erosive wear damage of valves in the field of coal chemical industry.

The invention discloses a coupler force testing calibration tooling. The coupler force testing calibration tooling comprises a platform, a force application component used for providing pulling forceand pressing force and a counter-force component opposite to the force application component are fixed to the platform, the force application component acts on a force sensor, and a coupler transitionsleeve to be calibrated is connected between the force sensor and the counter-force component, so that the acting force of the force application component is applied to the coupler transition sleevethrough the force sensor. The invention further discloses a coupler force testing experimental method, the coupler force testing experimental method comprises the steps that the coupler transition sleeve is installed on the coupler force testing calibration tooling, and a foil gauge is arranged on the surface of the coupler transition sleeve; calibration and verification are carried out, specifically, the force application component separately provides the pulling force and the pressing force, and a output result of the force sensor and a output result of the foil gauge are separately compared; and on-line testing is carried out after the verification is qualified. The coupler force testing calibration tooling provides a reliability basis for coupler force testing, the coupler force testing experimental method can realize on-line testing, understand the all terrain coupler force condition, and provide the basis for coupler optimization design, life evaluation and the like.

The invention provides a line-driving fast-mooring regulator, which comprises a carrier frame (1), a rotating self-locking device (2), a quick-release lever (3), a quick release buckle (6), a catch screw (7), a return spring (10), a trimming screw (11), a trimming screw (12) and a trimming handle (13). The quick-release buckle (6) of the connecting assembly at the front end and the rear, connected with the catch screw (7). The return spring (10) is fixed between the front end of the quick-release lever (3) and the catch screw (7). The pulling force can make the quick release buckle (6) be locked, and the locking and releasing can be accomplished by rotating the self-locking (2) and the quick-release lever (3). The invention relates to a line-driving fast-mooring adjuster, which is lightweight, large in carrying capacity, capable of coarse-tuning and fine-tuning tension as well as quick release, suitable for the tension mechanism of the fiber belt, suitable for various load-bearing belts. By adjusting locking angle of the self-locking device, the quick release lever and the rotary self-locking device obtain a line-driving function, and realize rapid releasing.

The invention relates to the technical field of explosion-proof devices for high-voltage cable joints, More specifically, the invention relates to a simulation method for the position of the vent holeopening of a high-voltage cable joint explosion-proof device, which comprises the following steps of: adopting COMSOL Multiphysics multi-physical field coupling simulation software to construct models of different types of vent hole explosion-proof devices; adopting the coupling mode of heat-Flow-solid multi-physical field is used to calculate the pressure release velocity change trend at different instantaneous corresponding to the energy relief holes at different installation positions. Based on the analysis of the changing trend of the pressure release velocity at different time corresponding to the energy release holes in different mounting positions, the optimal mounting position of the energy release holes is designed, which can improve the design accuracy and reduce the test workload by comprehensively considering the position where the specific type of cable connector is most prone to failure. The invention can optimize the installation position design of the energy dissipation hole of the explosion-proof device of the high-voltage cable joint, saves the test cost, improves the protection precision, and provides a reliable theoretical calculation method for the explosion-proof device design.

An optimized design of piston rod mechanism curved surface guide channel on rotary body surface includes carrying out optimization design on curve of curved surface guide channel on rotary body surface and providing three sets of optimized curve equation set based on 85102435.1 patent of P. R. China.

The invention provides a pressure regulation and control method and system for a stratospheric airship. A pressure regulation and control capsule body is arranged in a main capsule body of the stratospheric airship. The pressure of buoyancy lift gas in the main capsule body is increased or decreased due to the temperature change in the day and night operation process in the main capsule body. A part of buoyancy lift gas in the main capsule body is pressed into the pressure regulation and control capsule body or the gas in the pressure regulation and control capsule body is released to enter the main capsule body so as to achieve pressure regulation, so that the pressure of the main capsule body remains stable. According to the pressure regulation and control method and system for the stratospheric airship, the problem that a pressure regulation and control mode is irreversible due to the day and night state change in the long-term operation process of a current stratospheric airship can be solved, and the stratospheric airship is promoted to be practical as soon as possible.

The invention discloses a power switch cabinet protection system. The system comprises a controller, a protection current signal input module, a voltage signal input module, a digital signal input module, a wireless communication module, an analog quantity output module, and a programmable control output module. The power switch cabinet protection system is multifunctional, the production of a switch cabinet intelligent protection measurement and control apparatus and the construction of an on-site communication network are simplified, the workload for links of production, test, installation, debugging, and maintenance of the switch cabinets is greatly reduced, and the problem of heavy workload of test, installation, debugging, and maintenance in the conventional production process of the switch cabinets due to various kinds and quantities of intelligent measurement and control equipment is overcome; and since the current power equipment competition is especially more and more fierce, the optimization of the cost for design, manufacture, test, installation, debugging, and maintenance of the switch cabinets and the improvement of the system reliability are the shortcut for improving the competitiveness of equipment manufacturing enterprises.

The invention discloses a transport vehicle and a vehicle body thereof. The vehicle body comprises a bottom frame, side walls and end walls. The side walls are arranged on the two sides of the bottom frame. The end walls are arranged at the front end and the rear end of the bottom frame. A cavity for containing material is defined by the side walls and the end walls. A wall body of each side wall and a wall body of each end wall respectively comprise at least one aluminum profile wall body unit of a hollow structure. Each wall body unit comprises an outer wall board and an inner wall board, wherein a hollow structure is defined by the outer wall board and the inner wall board. Compared with the prior art, the vehicle body has the advantages that side columns arranged on the side walls and the end walls are omitted, the equal-strength design concept is adopted, the aluminum profile wall body units of the hollow structure are adopted, and the side walls and the end walls have smaller widths under the condition that the same structural strength is obtained; in this way, on one hand, the capacity of the vehicle body can be improved, and on the other hand, the design of the vehicle body can be easily optimized for the vehicles with the same use limit.

The invention relates to an emulation analytic method for a supportless grinding high rigidity main shaft system. The method comprises the following steps: based on three-dimension design software Pro/E, a three-dimension geometrical model is built to finish an assembly and form a digital prototype machine; seamless connection is realized by using submodule Pro/MECHANICA analyzing software of Pro/E; and in the submodule Pro/MECHANICA, a region is defined to restrict, load and contact, and the results of the stress and transfiguration of various relative parts are output after the calculation is performed. Considering various factors affecting the rigidity of the main shaft system, such as influences on contacting length between a core clamper and the center hole of a workpiece, the conicity of the center hole, the diameter of a bolt, arrangement mode, pretightening force, the conicity of a taper sleeve and magnitude of interference of the taper sleeve, the emulation analytic method provides a strong technical support for the design and manufacture of the supportless grinding high rigidity main shaft system with high performance.

The invention discloses a vibration test device for a two-stage fixed axis gear drive mechanism. The vibration test device comprises a first pump motor, a speed-up box, a first torque sensor, a gearbox, a second torque sensor, a reduction box and a second pump motor which are connected in sequence. The speed-up box, the gear box and the reduction box are connected with a lubricating pump station system. According to the invention, requirements for the vibration test under low-speed, high-speed, light-load and heavy load conditions are met, and unification of the torsional oscillation test of the two-stage fixed axis gear drive mechanism and the coupled vibration test transposition is achieved. With the adoption of the vibration test device provided by the invention, torque of input and output ends of a speed change mechanism and various vibration parameters such as acceleration, displacement, rotating speed and stress of key parts in the fixed axis gear train can be obtained accurately and conveniently, analysis of dynamics and fatigue strength can be carried out further according to the parameters, and the system design is optimized.

The invention relates to a high-pressure natural gas pressure energy refrigeration method for junked tire cryogenic pulverization. The pressure energy of high-pressure natural gas is converted into mechanical work and cold energy through an expansion machine in a natural gas regulator station. The mechanical work and the cold energy are recycled through refrigerants, the mechanical work is used for compressing the refrigerants, the compressed high-pressure refrigerants are cooled through an optimally-designed heat exchange network through the cold energy generated through the expansion of the high-pressure natural gas, the gas inlet temperature of the high-pressure natural gas entering the expansion machine is improved, and the mechanical work generated by the expansion of the high-pressure natural gas is increased. The cooled high-pressure refrigerants are conveyed to a junked tire cryogenic pulverization area through a heat preservation pipeline, low-temperature cold energy below -100DEG C is generated by the high-pressure refrigerants through the refrigerant expansion machine, the mechanical work generated by the expansion of the high-pressure refrigerants is used for the primary pressure boost of the refrigerants with the cold energy used up, the refrigerants are conveyed back to the natural gas regulator station, and a refrigerating cycle is formed. The high-pressure natural gas pressure energy refrigeration method has the advantages of effectively utilizing energy and preventing ice blockage, and belongs to the field of natural gas pressure energy utilization.

The invention discloses a construction method for integrally translating a box culvert full framing. The method specifically comprises the following steps: erecting the full framing at a cast-in-placebox culvert section part to be constructed; fixedly installing a box culvert formwork on the full framing, and carrying out steel bar binding and concrete construction of box culvert sections; carrying out maintenance of box culvert segment concrete is conducted to guarantee that the structural concrete strength meets the design and specification requirements; withdrawing the inner side mold backshore, and enabling the side mold plate to be naturally loosened; lifting the full framing and the box culvert template by using a jack, adjusting a bottom support, and moving the full framing to thenext box culvert construction section by using a traction device through pulling a traction frame; and dismounting a roller set and guide limiting rollers, and carrying out fixed supporting and subsequent box culvert segment construction onthe box culvert formwork. The construction method has the beneficial effects that the tool equipment is novel, the construction period is shortened, the formwork assembling quality is easy to control, and economy and high efficiency are achieved.

The invention relates to a connecting device for sealing an ultrahigh vacuum high heat load optical element cooling water way, and belongs to the research field of heat slow release of optical elements in an ultrahigh vacuum environment. In order to solve the problems in the prior art, a water pipe and a connecting nut assembly are installed in a through hole in a modified connecting flange, a flange O-ring is installed on the modified connecting flange, and the modified connecting flange and a multi-functional transforming weld assembly are connected and fastened in a sealed mode through a connecting flange fastening ring B; a cutting edge seal ring A and a cutting edge seal ring B are respectively installed in the multi-functional transforming weld assembly, the installed water pipe and the connecting nut assembly are connected with the water way in a sealed mode by connecting the water pipe with a two-way joint, a water pipe protective sleeve corrugated pipe weld assembly and the multi-functional transforming weld assembly are connected in a sealed mode through the cutting edge seal ring A, and the water pipe protective sleeve corrugated pipe weld assembly and a nut assembly are fastened in a sealed mode through a gasket A and a bolt A; a compression screw, a seal flange, an elastic lock nut and a low vacuum seal ring are connected with the modified connecting flange and seal the water pipe and the connecting nut assembly. The connecting device improves working efficiency.

The invention discloses a manufacturing method of a core-type induction furnace ring hearth. The method adopts wooden die and uses might bond and bamboo pin to connect the die sections into a ring hearth die with coherent cavity inside, before fixing the die inside the induction shell, with watertight treatment on the surface; after casting, refractory material dries out naturally. Use a resistance wire through the hollow wooden die, and blow clean by compression air and form ring hearth by gradually baking until the wooden die burnout, with electrifying and heating. The invention guarantees the ring hearth of no deformation, with the shape totally in accordance with theoretical design requirements and obtains pre-sintering ring hearth effect, with the advantages of no cracking, and long service life over two years, which is one year longer than steel ring hearth on average.

The invention discloses a dual-engine multi-dimensional-steam electric steaming box which comprises a housing, an inner container and a box door. An installing cavity is formed in the space between the top surface of the inner container and the housing, a built-in steam generating device is arranged at the bottom of the inner container, a water tank, a silicon-controlled control circuit board, an external steam generating device, a first water pump, a second water pump and a heat dissipation system are arranged in the installing cavity, the water tank is communicated with the external steam generating device through the first water pump and a pipe, steam inlets are formed in the left wall face, the right wall face and the rear wall face of the inner container, the external steam generating device is connected with the steam inlets respectively through a pipe, the external steam generating device is communicated with the external steam generating device through the second water pump and a pipe, a control display panel is arranged on the housing, and all the control display panel, the first water pump and the second water pump are electrically connected with the silicon-controlled control circuit board. The dual-engine multi-dimensional-steam electric steaming box adopts a dual-engine steam generating device, improves the temperature rise capability in a multi-dimensional-steam introducing mode, adopts a silicon-controlled mode and achieve perfect matching between electric energy and steam.