90results about How to "Both stable" patented technology

The invention discloses an air-ground amphibious four-footed emergency rescue investigation robot. The investigation robot comprises an unmanned aerial vehicle system, a four-footed system and a transmission system, wherein the unmanned aerial vehicle system comprises a fuselage, arms, a dual output shaft motor and a rotor wing; the transmission system comprises a shell connected with the arms and a worm wheel and worm driving mechanism arranged in the shell, an input end of the worm wheel and worm driving mechanism is connected with the lower ends of output shafts of the dual output shaft motor by virtue of a unidirectional coupler, and an output end of the worm wheel and worm driving mechanism is connected with the four-footed system in a driving way; and the four-footed system comprises four sets of crank and connecting rod mechanisms and elastic soles arranged at the tail ends of the crank and connecting rod mechanisms respectively. Compared with the prior art, the air-ground amphibious four-footed emergency rescue investigation robot provided by the invention integrates flying and walking into a whole, is simple in structure and easy to control, has stability and robustness at the same time and can land to ground in a critical area, move everywhere on the ground and acquire site hazardous gas and video data, and the accuracy and effectiveness of data are improved.

The invention discloses a preparation method for a composite microbial fertilizer with bioleached sludge. The method comprises following steps: taking half-dried bioleached sludge, mechanically grinding, sludge conditioning, fermenting in a reactor, drying, adding functional bacteria, and pelletizing and coating. The invention also discloses the composite microbial fertilizer which is prepared by the method discussed above with bioleached sludge. The composite microbial fertilizer contains organic matter, and nutrient elements which are essential for plant growth, such as nitrogen, phosphor and potassium. Because of the nutrient substances which are added in bioleaching processes and contain iron and sulfur, the composite microbial fertilizer also contains relatively abundant iron and sulfur, and can be used to provide nutrition for photosynthesis, and protein and nucleic acid synthesis of plant. The functional bacteria added into the composite microbial fertilizer possesses high stability and safety, and excellent ability for dissolving K and P. Compatibility of the functional bacteria is reasonable, and effective viable bacteria number is 0.025 billion per gram.

The invention discloses a line voltage compensation system based on the power supply of an energy storage module and an inverter. The system comprises a compensation inverter module, a compensation transformer, an energy storage and conversion module and an integrated control communication module. According to the invention, amplitude and phase controllable voltage is generated through the compensation inverter module and is injected into the power transmission line to realize full-phase voltage compensation. The system is used in combination with an SVG device with reactive, harmonic and three-phase imbalance compensation functions, the voltage and electric energy quality comprehensive compensation of a distribution line can be realized, and the power supply radius is effectively extended; according to the invention, an energy storage and conversion module is designed to be connected in parallel to a power supply line in order to limit a direct-current side energy source widely applied to the controllable series compensation device; the adjustment of peak-valley load balance of a power grid can be realized, and a circuit can also be used as an energy extraction circuit of the compensation inverter module to provide stable and sufficient energy source support for a voltage compensation process.

The invention discloses a supported composite transition metal oxide, a preparation method thereof and an application thereof as a catalyst, and relates to the technical field of catalyst preparation.The preparation method comprises the following steps: fully and uniformly mixing an inert carrier with a pore channel structure, a transition metal salt and an oxidant to obtain mixed powder; addingan aqueous solution containing ammonia ions or an organic amine aqueous solution into a reaction kettle, wherein the aqueous solution containing the ammonia ions or the organic amine aqueous solutionis placed in the reaction kettle and is placed outside a reaction container; sealing the reaction kettle, and then placing the reaction kettle at a temperature of 120 DEG C to 200 DEG C for heating for 6-18h to make the transition metal salt and oxidant produce redox reaction to produce composite oxide, and loading the composite oxide in the channel of the carrier and the surface of the carrier toobtain the supported composite transition metal oxide. The preparation method of the catalyst is simple and can be operated easily, and the prepared catalyst has both activity and stability.

The invention provides a transport bed methanation catalyst and belongs to the technical field of transport bed catalysts. Based on oxides, the catalyst includes 10-30 parts of an active component that is NiO, 0.5-15 parts of an auxiliary agent and 70-90 parts of a carrier that is Al2O3. The auxiliary agent is one or more selected from oxides of Mg, Ca, La, Ce, Zr, Ti and Mo. A preparing method of the catalyst is also provided. The method includes soaking calcinated alpha-Al2O3 microspheres in a solution of an auxiliary metal soluble salt and a soluble salt of Ni, and then drying and calcinating the microspheres to obtain the microsphere type transport bed methanation catalyst. The catalyst has characteristics of a low catalytic activating temperature, high activity, high stability, proper particle diameter distribution, good mobility, good carbon resistance, and good wear resistance, has a microsphere shape, and is suitable for transport bed reactors. The catalyst is prepared by a soaking process, and the preparing process is simple and efficient and facilitates large-scale production.

The invention relates to a hollow buffer structure for an artificial prosthesis. The hollow buffer structure comprises a closed thin wall part and a buffer structure outside the closed thin wall part, wherein the closed thin wall part is of a closed hollow structure, is located in the artificial prosthesis and is packaged by the buffer structure; the buffer structure is of a three-dimensional grid shape and fills the space outside the closed thin wall part and inside the outer contour of the artificial prosthesis; and a small through hole for discharging residual powder in the closed thin wall part is formed in the closed thin wall part. The closed thin wall part plays a main supporting role and needs to meet strength requirements, and the buffer structure plays a role of promoting the conduction of stress from the artificial prosthesis to bones. On the premise that the strength requirements are met, the hollow buffer structure manufactured by virtue of an additional material manufacturing technique is capable of promoting the conduction of the stress to the bones, so that the bone loss and loosening caused by stress shielding are avoided, the stability of the implanted artificial prosthesis can be improved, and the service life of the implanted artificial prosthesis can be prolonged.

The invention discloses a preparation method and application of a fluorescent nanofiber film based on a bimetallic organic framework. The fluorescent nanofiber film is prepared by taking the bimetallic organic framework and a PMMA polymer as raw materials and utilizing an electrostatic spinning technology. The purpose of detection is achieved through the quenching amount of the fluorescent signalof the fluorescent nanofiber film. The fluorescent nanofiber film has the unique advantages of high sensitivity, good selectivity, short response time and the like when used for detecting nitro-explosive { (4-NA (p-nitroaniline), TNP (picric acid) } and antibiotic { (NFT nitrofurantoin, NFZ nitrofurazone) } in water.

The invention relates to a bionic knee joint mechanism based on a tensegrity structure which overcomes the defects that a traditional bionic knee joint mechanism is large in size, heavy in mass, poorin flexibility, complex in a control system and the like, and has the advantages of being flexible, stable, simple and convenient to manufacture in structure. According to the bionic knee joint mechanism based on the tensegrity structure, the tensegrity structure is combined with a four-rod mechanism, self-locking of the bionic knee joint mechanism can be achieved, self-locking can be achieved without control, and it can be guaranteed that a knee joint robot has the bionic characteristic and the mechanical characteristic at the same time. The bionic knee joint mechanism based on tensegrity structure is simple in structure, at the same time, the movement process of the mechanism simulates rolling and sliding between thighbone and tibia in the rotation process of a human knee joint, accordswith the biomechanical characteristics of the human knee joint, is expected to vigorously develop, and achieves the practical application value in multiple fields.

The invention relates to high-temperature-stable slow-digestion starch and a preparation method and application thereof. The preparation method is characterized by including steps: gelatinizing: gelatinizing raw material starch, water and hydrophilic colloid to obtain a gelatinized starch mixture; separating: separating the gelatinized starch mixture to obtain the high-temperature-stable slow-digestion starch. Through the preparation method, the problem that conventional methods for preparing slow-digestion starch are instable in high-temperature processing is solved effectively, and the defect of long-time aging recovery of starch can be overcome effectively. In addition, through the preparation method, a starch product with high freeze-thaw stability is obtained, and expanding of application of the slow-digestion starch in various fields is facilitated.

The invention provides an urban livability evaluation method based on a BP neural network. The urban livability evaluation method comprises the steps of establishing a BP neural network evaluation model based on a factor analysis method; establishing and solving a factor analysis model; improving the established BP neural network evaluation model to obtain an improved BP neural network model; analyzing the multi-parameter sensitivity according to the result of the improved BP neural network model; and constructing a dynamic comprehensive evaluation model of the urban livability, and evaluatingthe urban livability. According to the method, cities are ranked; the sensitivity of parameters selected by ranking is analyzed, the influence of future factor changes on cities is predicted, a better guiding effect is achieved on future development of the cities, and the article evaluation and prediction system has both stability and accuracy through combined application of a traditional algorithm and an intelligent algorithm.

The invention discloses a remote control model locomotive comprising a locomotive body, front and rear wheels arranged on a front section and a rear section of the locomotive body and a power output device, wherein each rear wheel comprises a fixed rod, a rim set, a planetary gear set, a unidirectional rotating piece, a clutch set and a fly wheel set, wherein the rim set is used for the fixed rod to pass through and to be positioned and driven by the power output device to rotate; the planetary gear set comprises a fluted disc and a plurality of planetary gears; a shaft hole is arranged in the center of the fluted disc and used for the fixed rod to pass through; the planetary gears are meshed and rotate around the fluted disc; the unidirectional rotating piece passes through and is arranged between the fixed rod and the shaft hole of the fluted disc and unidirectionally reversely rotates when being used for braking the fluted disc to receive the external viscous torque; the clutch set is connected with the planetary gears to synchronously rotate and expands outwards due to the centrifugal force during rotation at high speed; the fly wheel set is provided with a fly wheel body, is encircled on the outer circumferential edge of the clutch set and is expanded and braked by the clutch set to synchronously rotate at high speed; and the fly wheel body is provided with a plurality of depresses which are used for balance weight blocks with the same or less than the number of the depresses to be inserted into.

The invention discloses an earth surface component temperature multi-algorithm integration algorithm based on a Bayesian model averaging method. The earth surface component temperature multi-algorithmintegration algorithm comprises the following steps: I, performing earth surface temperature inversion based on a split window algorithm or a temperature emissivity separation algorithm; II, performing algorithm evaluation on a multi-pixel, multi-angle, multi-temporal and multi-band inversion method based on a data set of ground measurement and three-dimensional model DART simulation and a Bayesian model averaging method; III, inverting the temperature of surface components (namely vegetation and soil) by using the multi-pixel, multi-angle, multi-temporal and multi-band method respectively; and IV, performing inversion structure fusion on the weight factor of each sub-algorithm obtained through algorithm evaluation to obtain a component temperature inversion result of the integrated algorithm. According to the invention, a multi-algorithm integrated framework for component temperature inversion is constructed, the uncertainty of single algorithm / single data source inversion is reduced, and the accuracy and stability of surface component temperature inversion are improved.

The invention discloses a high-concentration and low-concentration gas mixing system, belongs to the technical field of high-concentration and low-concentration gas mixing systems, and aims to providean improvement of a hardware structure of the high-concentration and low-concentration gas mixing system. According to the technical scheme for solving the technical problem, the high-concentration and low-concentration gas mixing system comprises a high-concentration gas pump station, a low-concentration gas pump station, a gas mixing device and a control system, wherein the high-concentration gas pump station is connected with a high-concentration gas inlet of the gas mixing device through a gas conveying pipeline; the low-concentration gas pump station is connected with a low-concentrationgas inlet of the gas mixing device through the gas conveying pipeline; the high-concentration gas inlet is connected with a gas inlet of a mixer through a high-concentration pipeline; the low-concentration gas inlet is connected with a gas inlet of the mixer through a low-concentration pipeline; a gas outlet of the mixer is connected with a mixed gas outlet of the gas mixing device through a pipeline; and the mixed gas outlet is connected with a generator set through the gas conveying pipeline; The high-concentration and low-concentration gas mixing system is applied to high-concentration andlow-concentration gas mixing.

The invention relates to a retractable anti-theft door and window and a sliding sheet assembly of the retractable anti-theft door and window. The sliding sheet assembly comprises a sliding sheet body, an elastic clamp and a hinged shaft used for hinging the sliding sheet body to one connecting piece of the retractable anti-theft door and window. An hinged hole is formed in the end of the sliding sheet body, the elastic clamp is installed on the sliding sheet body and intersects with the hinged hole, an axial limiting clamping groove is formed in the hinged shaft, the hinged shaft penetrates through the hinged hole, and the axial limiting clamping groove is connected with the elastic clamp in a clamping mode. The retractable anti-theft door and window comprises a frame, multiple grid tubes and multiple connecting pieces, sliding rails are installed in the frame, the grid tubes are arranged on the sliding rails in a sliding mode, every two adjacent grid tubes are connected through two connecting pieces hinged mutually, the sliding sheet assembly of the retractable anti-theft door and window is arranged in each grid tube in a sliding mode, a sliding groove is formed in each grid tube and corresponds to one sliding sheet assembly, and the hinged shaft in each sliding sheet assembly penetrates through the corresponding sliding groove to hinge one connecting piece to the corresponding sliding sheet body. The retractable anti-theft door and window and the sliding sheet assembly of the retractable anti-theft door and window have the advantages of being simple in structure, convenient to install and high in generality.

The invention relates to an all-solid composite polymer solid electrolyte and a preparation method thereof. The all-solid composite polymer solid electrolyte comprises a solid electrolyte matrix and alithium salt, wherein the molar ratio of the lithium ion in the lithium ion solid electrolyte to the ether oxygen atom in the polyethylene oxide is, namely, Li: EO=1: 4-25, the solid electrolyte matrix is prepared by blending polyethylene oxide and polyperfluorohexyl ethyl methacrylate, and the mass ratio of the polyethylene oxide and the polyperfluorohexyl ethyl methacrylate is 10: 1-10. The preparation method of the all-solid composite polymer solid electrolyte comprises the steps of preparing the polyperfluorohexyl ethyl methacrylate, preparing the solid electrolyte matrix and further preparing the all-solid composite polymer solid electrolyte. The all-solid composite polymer solid electrolyte has the characteristics of wide electrochemical window, high ion conductivity, good stabilityperformance and good mechanical performance and the like.

The invention belongs to the field of inverted tricycles, and in particular discloses a T-shaped inverted triangular servo electro-tricycle; the T-shaped inverted triangular servo electro-tricycle which is simple in structure, free of maintenance, wide in application range, strong in steering performance and rollover resistance and good in following property is provided. The T-shaped inverted triangular servo electro-tricycle comprises a frame, wherein the back end of the frame is connected with a single rear wheel by a rear hanger bracket system; the front end of the frame is connected with a left front wheel and a right front wheel by a front hanger bracket system; both front and back ends of the front hanger bracket system are respectively provided with a rotating shaft; each rotating shaft is rotatably plugged into a connecting pipe at the front end of the frame; the front hanger bracket system is movably connected with the frame by the rotating shafts and the connecting pipes; a steering system used for controlling the steering of the tricycle is also arranged at the front end of the frame; the steering system drives the frame to rotate around the rotating shafts so as to drive the left front wheel and the right front wheel to steer.

The objective of the present invention is to provide: a thermochromic film which achieves a good balance between durability and stability of haze; and a thermochromic composite body. A thermochromic film according to the present invention contains vanadium dioxide particles having thermochromic properties, and is characterized by having a vanadium dioxide containing-layer which contains a chelatecomplex together with the vanadium dioxide particles.

The invention provides a two-dimensional metal / covalent organic framework (COF)-based photocatalytic composite material carrying metal nanoparticles as well as a synthesis method and application of the two-dimensional metal / covalent organic framework (COF)-based photocatalytic composite material. The composite material mainly comprises a two-dimensional metal material, a two-dimensional COF material and metal nanoparticles, the three components react, grow and are compounded according to the mass ratio of 1: (0.4-0.7): (6.4-14.5), and reaction parameters such as the stirring speed, the reaction time and the temperature are further optimized. The two-dimensional metal and the COF material are connected through a covalent bond to form a stable two-dimensional heterojunction, so that the lattice adaptation limit is reduced, and the photocatalytic performance is enhanced; the two-dimensional composite material carries the metal nanoparticles, so that the release rate of metal ions can be greatly reduced, the antibacterial life is prolonged, and the pollution to the environment is reduced. The synthesized composite structure can be applied to a marine antifouling coating, and has the properties of environmental protection, long acting, high efficiency and the like.

The invention provides a self-repairing and recoverable polyimide insulating film as well as a preparation method and application thereof, and belongs to the technical field of insulating films. Comprising the following steps: S1, carrying out first polymerization reaction on an amino monomer and 4, 4 '-(4, 4'-isopropyl diphenoxy) bis (phthalic anhydride) to obtain an amino-terminated copolymerized polyamide acid solution; the amino monomer comprises 1, 4-bis (4-amino-2-trifluoromethyl phenoxy) benzene and / or 9, 9-bis (3-fluoro-4-aminophenyl) fluorene, and the amino monomer comprises 1, 4-bis (4-amino-2-trifluoromethyl phenoxy) benzene and / or 9, 9-bis (3-fluoro-4-aminophenyl) fluorene; s2, carrying out azeotropic water removal treatment on the copolymerized polyamide acid solution and an organic solvent to obtain polyimide powder; s3, carrying out a second polymerization reaction with a tri-aldehyde group cross-linking agent; and S4, carrying out a thermal cross-linking reaction at the temperature of 250-300 DEG C. The film disclosed by the invention can be recycled and repaired for multiple times, and has the advantages of low dielectric constant, good mechanical property, high thermal stability, high insulation characteristic and excellent insulation property recovery capability.

The invention provides a compound sponge cup with a soft and hard combined touch and a production method. The sponge cup is soft and elastic, the average density of the sponge cup subjected to foam forming is 25 kg / m<3>, the hardness is 20-25 (with reference to the ASTMD2240-97 standard), the resilience rate is 40%, the elongation is equal to or larger than 180%, the extension strength is equal toor higher than 100 kpa, and the tear strength is equal to or higher than 200 N / M. The sponge cup is subjected to high-temperature heat-setting operation after being subjected to foam forming, spongedoes not deform when heated and compressed in a mould pressing process, during hardness change, five hardness points can be controlled, and not only is a soft hand feeling retained, but also support of the cup is improved, so that the compound sponge cup with the soft and hard combined touch has wearing comfort and crispness and stability of a cup structure at the same time.

The invention discloses a supporting device used in the process of polishing toenail plates or coating the surfaces of the toenail plates with a fluid, and belongs to the technical field of toenail polishing tools. The supporting device comprises a cylindrical support body, wherein the support body is rotatably mounted on a bracket; the support body is composed of a toe supporting part and a rotating cylinder; the toe supporting part is located at the upper half part of the support body; five toe separating grooves, which correspond to toes of a person and have two transparent ends, are uniformly formed in the upper part of the toe supporting part; extending directions of the toe separating grooves are perpendicular to an axial direction of the support body; two inner sides of each of the toe separating grooves are made of elastic materials; spacing parts between the toe separating grooves form toe separating blocks; the rotating cylinder is fixedly connected to a position under the toe supporting part and is butt-jointed with the toe supporting part to form a complete cylinder; a rotating shaft is fixedly connected with the two ends of the rotating cylinder and mounted on the bracket through a bearing. The supporting device has the rotary support body, thereby being capable of easily adjusting angles and positions of the toes and greatly improving the operation convenience and foot comfort.

The invention provides a data line production performance test system and test method, and belongs to the technical field of data line production performance tests.The data line production performance test system comprises a testboard, a disc piece is rotationally connected to the testboard, limiting blocks are symmetrically arranged on the testboard with the disc piece as the center, and connecting pieces are slidably inserted into the limiting blocks in a penetrating mode; the opposite ends of the connecting pieces are connected with stable placement bases; the stable placement bases are provided with placement bearing assemblies; the testboard is slidably connected with a supporting frame; and the supporting frame is connected with a state setting assembly matched with the placement bearing assemblies. Through the combined action of an eccentric column, a following part, the stable placement bases, the placement bearing assemblies and the state setting assembly, the actual use plugging process of a data line is simulated in the process of testing the plugging life of the data line, the coincidence degree of the testing plugging life of the data line and the actual use plugging life of the data line is effectively improved, and the data line can be optimized better.

The invention provides an air conditioner control method. The method comprises the steps of determining a pressure error value and a pressure error change value based on an actual pressure value and a target pressure value; defining a fuzzy subset, establishing a discrete domain, and calculating a pressure error value and a membership degree of a pressure error change value to the fuzzy subset; adaptively generating a fuzzy rule table according to system characteristics and environmental conditions; performing defuzzification according to a gravity center method, and determining a proportion parameter increment and an integral parameter increment; and based on a calculation formula of a PID controller, the proportion parameter increment and the integral parameter increment, obtaining a control signal of an outdoor fan, and then adjusting the speed of the outdoor fan. According to the air conditioner control method, the link of manual trial and error in the process of establishing the fuzzy rule table is omitted, resources and cost are saved, meanwhile, the operation period of the fuzzy rule table is effectively shortened, and the air conditioner operation process is more stable and reliable. The invention further provides the air conditioner adopting the method, and the air conditioner has the advantages of timeliness and stability.

The invention provides a polyvinyl chloride lampshade with high light transmittance and a preparation method thereof. The lampshade comprises the following components in parts by weight: 100-120 parts of polyvinyl chloride, 10-13 parts of talcum powder, 10-13 parts of fumed silica, 1-2 parts of aluminum sulfate, 2-3 parts of sodium fluosilicate, 4-5 parts of polyurethane, 1-2 parts of polyether glycol, 4-5 parts of epoxy stearate, 0.3-0.5 part of lauryl dimethyl amine oxide, 0.1-0.2 part of zinc pyrithione, 0.4-1 part of diphenylmidazoline and 1-3 parts of polyamide wax micro powder. The lampshade provided by the invention is resistant to high temperature and poaching, and is high in light transmittance; most light emitted by a lamp can penetrate through the lampshade, so that a use ratio of electric energy is improved, a significant progression is achieved in the field of production of energy-saving and environment-friendly materials, and the lampshade is of great and practical significance.

The invention discloses a feedforward selection method in a flexible direct-current control circuit and a related device. The method comprises the following steps: acquiring a power grid background harmonic voltage and a voltage module value variable quantity calculated according to the acquired power grid voltage; and judging whether the voltage module value variation exceeds a variation threshold value, if so, feeding back a preset actual power grid voltage as a feedforward quantity to a current inner loop controller, if not, judging whether the power grid background harmonic voltage exceedsa harmonic threshold value, if yes, feeding back a preset hybrid power grid voltage as the feedforward quantity to the current inner loop controller, and if not, feeding back a preset virtual power grid voltage as the feedforward quantity to the current inner loop controller, wherein the preset hybrid power grid voltage comprises the preset virtual power grid voltage and the preset actual background harmonic voltage. According to the invention, the technical problem of contradiction between AC resonance suppression and AC power grid voltage drop resistance in the existing flexible DC controlstrategy is solved.

The invention discloses a laser radar subsequent optical path chopper disk output frequency stabilizing method. The method employs a photoelectric conversion output circuit to accurately and rapidly output the frequency of a subsequent optical path chopper disk, which is more accurate and reliable than the rotating speed voltage signal outputted by a motor hall sensor; meanwhile, according to the characteristics of a chopper disk system, the method controls a control computer to perform voltage output control, effectively reduces the time lag characteristic of the subsequent optical path chopper disk system, and possesses rapidity, accuracy, stability, and sound dynamic and static state characteristics; meanwhile, the method controls the computer to perform correlation calculation and result display, and preserves and plays back the intermediate result of each link at any moment.

The invention discloses a single-motor-driven robot walking mechanism. The single-motor-driven robot walking mechanism comprises a shell, a worm-gear driving mechanism arranged in the shell, a crank and connecting rod mechanism connected with the output end of the worm-gear driving mechanism and an elastic sole arranged at the tail end of the crank and connecting rod mechanism. The worm-gear driving mechanism comprises a motor, an output shaft, a worm and a worm gear, wherein the worm is engaged with the worm gear; the motor is in driving connection with the worm through a coupler, and the output shaft is in coaxial connection with the worm gear; the crank and connecting rod mechanism comprises a crank, a connecting rod, a frame connecting rod and a machine-body connecting rod, one end of the crank is connected with the output shaft, the other end of the crank is rotationally hinged to the upper end of the connecting rod, one end of the frame connecting rod is rotationally hinged to the machine-body connecting rod, the other end of the frame connecting rod is rotationally hinged to the middle of the connecting rod, and the other end of the machine-body connecting rod is used for being connected with a machine body. The single-motor-driven robot walking mechanism is simple in structure and easy to control, has both the stability and the robustness, is similar to the sole of a person in track, can achieve straight-line walking, and has the advantages of damping and adapting to complex terrains.

The invention belongs to the technical field of titanium alloy smelting, and discloses a nitride composite refractory material for titanium alloy smelting and a preparation method thereof. The nitride composite refractory material for titanium alloy smelting is prepared from the following components in percentage by mass: 10-40% of boron nitride powder, 60-90% of aluminum nitride powder and the balance of additives, the addition amount of the additive is 3-6% of the total mass of the boron nitride and the aluminum nitride; the additive is yttrium oxide. The invention also discloses a preparation method of the nitride composite refractory material. The composite refractory material is prepared by adopting a powder metallurgy technology. The refractory material disclosed by the invention has high density, high corrosion resistance, thermal shock resistance and excellent high-temperature chemical inertness, hardly reacts with a titanium alloy melt, is simple in preparation process and low in cost, and can be used for smelting low-energy-consumption and high-quality titanium alloy.