72results about How to "Uninterrupted supply" patented technology

The invention relates to a domestic hot water and air conditioning (cooling or heating) supply device, in particular to an integrated heating device linking a solar thermal collector, an air source heat pump and a medium- high temperature water-source heat pump and belongs to the technical field of thermal utilization. The tri-link device comprises the air source heat pump 1, the solar thermal collector, a fan coil, a floor heating system, an auxiliary electric heating device, a water pump, a water tank, a piping system, a valve system, a flowmeter system, a control system, a power source, a cable and a heat exchanger. The device of the invention fully utilizes the renewable energy, saves energy, reduces pollutant discharge and use-cost, has simple structure, is safe, stable and reliable,and can supply 55-60 DEG C of hot water continuously for daily life and can realize cooling in summer and heating in winter.

The invention provides a network TV set system that comprises: TV set program menu server, network TV set top box, and m flow medium servers, thereinto said network TV set top box includes: resource orientation symbol selector which is used to receive said m resource orientation symbols from the TV set program menu server, selecting the resource orientation symbol of most high priority P1, and request flow medium from corresponding first flow medium; fault detector which is used to send request of selecting resource orientation symbol of secondary priority P2 under condition that it detects the first flow medium server is fault, the resource orientation symbol selector selects the secondary priority P2 based on request of fault detector, and requests flow medium for corresponding second flow medium. With the system, user can be ensured to look on TV set continuously, reliability of system can be guaranteed easily and effectively.

The invention relates to an aviation equipment maintenance equipment ordering decision-making method based on importance and inventory limit, and the method comprises the following steps: obtaining the impact degree of maintenance equipment on a flight mission, the preparation condition of the maintenance equipment, the consumption of the maintenance equipment and the unit price information of themaintenance equipment, building an importance evaluation model to acquire the importance A of the maintenance equipment; establishing an importance grade making model according to the importance of the maintenance equipment to obtain the importance grade number of the maintenance equipment; establishing an inventory limit model; establishing an ordering model and an ordering optimization model; and carrying out ordering according to the ordering model or the ordering optimization model. During ordering, the sum of the existing number of the maintenance equipment and the ordering number is within the inventory limit calculated by the inventory limit model. The basic fault turnover standard is optimized from the perspective of an equipment system, it is ensured that good guarantee rate of navigation materials of one aircraft type can reach the level of actual requirements according to the equipment stored according to the inventory lower limit, and ordering accuracy of the maintenance equipment is improved.

The invention discloses a heat pump hot water system for ensuring continuous water supply by using a cluster control technology, aiming at solving the problem in the traditional heat pump control system. Each module machine and a main control cabinet can be communicated bidirectionally and all module machines can be communicated bidirectionally, wherein the main control cabinet is used as a center node to form a star topology network with each module machine, and all module machines form an annular topology network. When one module machine abnormally operates, the main control cabinet can be immediately subjected to operation regulation; and when working conditions change, a unit can be conveniently subjected to self-adaptive regulation. When the main control cabinet is in failure, intelligent control units in all module machines are coordinated to realize system control.

The invention provides a vehicle full-automatic disinfecting system, which comprises a detection device, a disinfecting device, a disinfectant supply device and a control system, wherein the detection device is arranged at the front end of the disinfecting device; the disinfecting device is connected to the disinfectant supply device; the disinfectant supply device is used for continuously supplying disinfectant liquid to the disinfecting device; the control system is connected to the disinfecting device and is used for controlling the disinfecting device to jet the disinfectant liquid to a vehicle which enters the disinfecting device; and the control system is also connected to the disinfectant supply device, and by virtue of the control system, the disinfectant supply device can continuously and stably provide the disinfectant liquid at a preset concentration to the disinfecting device.

The present invention relates to a depositing and use separation station (20) for a sheet punching press and / or imprinter (100) for depositing each useful part (6.2) and whole paper piece (6.1) of the sheet (6) on a stack (14) as a middle sheet, and also to a machine. The depositing and use separation station (20) is constructed to comprise a reciprocateable upper tool (21) and a lower tool (23) which cooperates with the upper tool for separating a useful part, wherein, the lower tool (23) can lift for (h') from an operation position to an overposition above a sheet conveying plane (E). The invention further relates to a method for depositing the middle sheet (6.1) on the sheet stack (14).

The invention relates to a forest fire early-warning system powered by a microbiological fuel cell and a realizing method thereof. The forest fire early-warning system comprises a GSM transmission system which is connected with a plurality of ZigBee coordinators. Each ZigBee coordinator is connected with a plurality of acquisition terminal nodes. The acquisition terminal nodes are arranged in a forest in a star-shaped topological structure for acquiring temperature, humidity, smoke concentration, pressure and illumination strength data of the forest. The GSM transmission system is furthermore connected with a centralized controller. The centralized controller is connected with a remotely arranged PC. The forest fire early-warning system further comprises the microbiological fuel cell which is connected with the acquisition terminal nodes, the Zigbee coordinator and the GSM transmission system for supplying electric power to the acquisition terminal nodes, the ZigBee coordinator and the GSM transmission system. The invention further relates to a realizing method of the forest fire early-warning system powered by the microbiological fuel cell. According to the forest fire early-warning system and the realizing method thereof, non-interrupted energy supplying to the system can be realized without an artificial power supply, and furthermore a significant meaning in continuous real-time detection and early-warning on the forest fire is realized.

The invention provides an intelligent household micro-network system based on peak and off-peak difference of electricity price. The intelligent household micro-network system stores electric energy during a the time when the electricity price is the lowest each day, and releases the stored electric energy for use. The intelligent household micro-network system comprises a case body, a controller built-in the case body, a current condenser, a charger, an inverter and AC contactors JC1, JC2 and JC3, wherein commercial power is sequentially and electrically connected the AC contactor JC2 and electric appliances of a user, the commercial power is sequentially and electrically connected the AC contactor JC1 and the input end of the charger, the output end of the charger is respectively and electrically connected the current condenser and the input end of the inverter, the control signal input end of the inverter is electrically connected with the controller, and the output end of the inverter is sequentially and electrically connected the AC contactor JC3 and the electric appliances of the user. The intelligent household micro-network system can reduces peak and off-peak difference of a power grid, stores electric energy for use, consumes electricity reasonably, and lowers electricity charge. The intelligent household micro-network system is reasonable in structure, convenient for control, high in automation degree, and excellent in use effect.

The invention relates to a triple-generation system based on an energy-saving solar air source heat pump. The triple-generation system comprises an air compression unit, a solar heating unit and a refrigerant circulating unit, wherein the air compression unit comprises a first compressor and a gas-liquid separator; the solar heating unit comprises a hot water heat exchanger, a first hot water tank, a solar heat collector, a solar pump and a hot water pump; and the refrigerant circulating unit communicates with a heat exchanger of an air conditioner, a circulating pipeline and an air-cooled heat exchanger. The triple-generation system disclosed by the invention has functions of conditioning air and supplying domestic hot water; meanwhile, solar energy is utilized to the maximum extent to supplement heat required by the system; the utilization rates of solar energy and electric energy are high; renewable energy sources are fully utilized, and energy conservation and environmental protection are realized; the triple-generation system has the advantages of simple structure, reliable operation, greenness and low carbon; the triple-generation system can be used for continuously providing the domestic hot water, refrigerating in summer and warming in winter; more electric energy is saved; and by reasonable control, multiple modes of separately refrigerating, separately supplying heat, separately producing hot water, simultaneously refrigerating and producing hot water, simultaneously heating and producing hot water and the like can be realized.

The invention provides a high-capacity low-power water storage type lukewarm water drinking fountain. The high-capacity low-power water storage type lukewarm water drinking fountain comprises a waterinflow assembly, a water boiling assembly, a conduction assembly and a water storage assembly. The water inflow assembly comprises a main water inlet pipe; the conduction assembly comprises a conduction water pipe; the water boiling assembly comprises a heating container, a water boiling tube, a heating device and a first temperature sensor, wherein the heating device and the first temperature sensor are arranged on the heating container; the water storage assembly comprises a water storage tank, a second temperature sensor, a lukewarm water pipe, a water drain pipe and a drainage electromagnetic valve, wherein the second temperature sensor is arranged on the water storage tank, the lukewarm water pipe and the water drain pipe are connected with the water storage tank, and the drainage electromagnetic valve is arranged on the water drain pipe; the heating container is connected with the main water inlet pipe, and the conduction water pipe is connected with the heating container and thewater storage tank; when the water temperature of water in the water storage tank is lower than a set temperature, the drainage electromagnetic valve is opened, and the water flows out from the waterdrain pipe; and meanwhile, water of the heating container is supplemented into the water storage tank through the conduction water pipe until the water temperature of the water in the water storage tank reaches the set temperature, and the drainage electromagnetic valve is closed. Compared with related technologies, the high-capacity low-power water storage type lukewarm water drinking fountain provided by the invention has the advantage that uninterrupted lukewarm boiled water supplying can be achieved.

The invention discloses an ecological drying system, and relates to the technical field of drying, a drying frame is provided with a main heat source water inlet and an auxiliary heat source water inlet, and the drying frame is connected with a primary heat source device and a secondary heat source device; the primary heat source device comprises a solar heat collection system, an air heat source pump system and a heat storage water tank; the solar heat collection system comprises a solar heat collector, the air heat source pump system comprises an air source heat pump and a heat circulating pump, and the secondary heat source device comprises an auxiliary heat water tank, a heating unit and an auxiliary heat circulating water pump. The primary heat source device for providing a main drying heat source and the secondary heat source device for providing an auxiliary heat source are arranged, so that the main drying heat source passes through the solar heat source system and the air heat source pump system, and heat generated by working of a control chip of the whole drying system is used as the auxiliary heat source; and the drying system is high in heat collection efficiency, improves the drying efficiency, and is energy-saving and environment-friendly.

The invention relates to an intelligent accurate drug delivery device for joint damage. Through remote computer control and real-time drug concentration monitoring, timing quantitative and accurate supply of a drug can be realized, that is, the accurate-position uninterrupted supply of the drug is realized without affecting patient action; when the real-time drug concentration monitoring is performed, light in a characteristic light band for the drug is used, so that the drug concentration can be detected more accurately. A designed intra-cavity drug delivery head that can be arranged in a joint position can be squeezed and deformed by a joint, so that the system can realize two functions of drug concentration detection and accurate drug delivery without affecting the movement of the joint, and the system can be applied to other application scenarios requiring continuous drug delivery.

The invention discloses a power distribution method of multiple generator units of a heavy-duty hybrid electric vehicle. The method includes the steps that firstly, based on a full-load power, a firstpower and a second power are set; secondly, the drive power required by the whole vehicle is obtained in real time in the vehicle traveling process; thirdly, if the drive power is smaller than or equal to the first power, the fourth step is executed, and if the drive power is larger than the first power and smaller than or equal to the second power, the fifth step is executed; fourthly, the generator unit with the shortest accumulated work time is in a power generation working state, and the second step is executed again; and fifthly, at least two generator units except for the generator unitwith the longest accumulated work time are in a power generation working state, and the second step is executed again. The method effectively solves the problem existing in power distribution in theunited working process of the multiple generator units, the mode that power sections and the accumulated work time are combined is adopted for dividing the multiple generator units and making the designated generator units to output the powers, and therefore the operation service life of the generator units is greatly prolonged.

A safe and environment-friendly coke oven shutdown method comprises the following steps that (1) two openings with pressure are blocked and broken at intervals on a negative-pressure gas pipe before ashutdown coke oven enters a gas purification system, so that the shutdown coke oven is disconnected from the gas purification system; (2) a liquid outlet is arranged in the negative-pressure gas pipebetween the two blockage parts by adopting a pressure opening technology; (3) a sparkless cutting technology is adopted to cut off the negative pressure gas pipe part between the two blocked parts; (4) a flange is welded on the outer side of the negative-pressure gas pipe connected with the gas purification system, and a flange blind plate is mounted; and (5) inert gas is introduced into a gas collecting pipe for purging and pressure maintaining, and tempering combustion explosion of coal gas in the gas collecting pipe is prevented. The method is good in blocking and breaking effect, mature and reliable in technology and high in safety in the construction process, a single coke oven can be stopped running under the condition that a gas blower is not stopped, normal production of the othercoke oven is not affected, and the coke oven can be stopped on the premise of safety.

The invention relates to the technical field of intelligent household appliances, and discloses a part taking and placing system for intelligent household appliance production. The part taking and placing system involves a box body, wherein a base is arranged on the lower portion of the box body, a bracing rod is arranged inside the box body, a sliding rail is arranged on the surface of the bracing rod, material taking boxes are arranged on the side surface of the bracing rod, auxiliary springs are arranged on the lower portions of the material taking boxes, supporting rods are arranged insidethe material taking boxes, rotary discs are movably connected to the surfaces of the supporting rods, and side plates are arranged on the surfaces of the rotary discs. According to the part taking and placing system for the intelligent household appliance production, through cooperative use of the material taking boxes and racks, cooperative use of the racks and gears, and cooperative use of thegears and sealing plates, automatic material supplement is achieved, uninterrupted material supply of workers is guaranteed, the working efficiency of the workers is improved, and through cooperativeuse of the material taking boxes and a material storage box, the material storage capacity is increased, so that the workers work more conveniently.

The invention relates to a CO compensation supply system on a CO conveying pipeline and application of the CO compensation supply system. The CO compensation supply system comprises a CO liquid tank used for storing liquid CO and a vaporizer for vaporization of the liquid CO. The vaporizer is provided with a first heat exchanger, a second heat exchanger and a third heat exchanger used for vaporization of the liquid CO. A first pipeline, a second pipeline and a third pipeline are led out of the CO liquid tank. The first pipeline is connected with the first heat exchanger, the second pipeline is connected with the second heat exchanger, and the third pipeline is connected with the third heat exchanger. A first gas CO supply pipeline is led out of the first heat exchanger and connected to the CO conveying pipeline. A second gas CO supply pipeline is led out of the third heat exchanger and connected to the CO conveying pipeline. A backflow pipeline is led out of the second heat exchanger and connected to the first pipeline. Each pipeline is provided with a valve. The system is convenient to operate, and different compensation amounts can be controlled according to the situation of inner pressure of the CO conveying pipeline.

The invention provides a double-cavity fuel oil system suitable for diving flight of an unmanned aerial vehicle and a design method thereof. An outlet of a soft oil tank in the double-cavity fuel oilsystem communicates with an oil inlet in the upper end of an oil-gas separator through an oil pump, and an oil outlet in the lower end of the oil-gas separator is externally connected with an engine oil inlet through a one-way valve. An oil inlet and an exhaust port are formed in an upper end cover of the oil-gas separator; an oil outlet is formed in the lower part of the side wall of the oil-gasseparator; and a liquid level sensor is mounted on a side wall plate of the upper cavity. The oil-gas separator is divided into an upper cavity and a lower cavity. Reliable oil supply during normal flight of the unmanned aerial vehicle can be met, the fuel oil system can stably and reliably supply pure fuel oil to the engine when the unmanned aerial vehicle flies in a large maneuvering flight attitude, especially in dive flight and pull-up re-flight, normal work of the engine is guaranteed, and the influence on the oil supply reliability at the oil outlet due to violent shaking of the fuel oilliquid level caused by adverse factors such as yawing, overload and wind gushing of the unmanned aerial vehicle during flight can be effectively avoided.

The invention discloses an intelligent automatic water purification system based on a PLC controller, which solves the problems of the filter in the prior art, which needs to be stopped for maintenance after failure, the pipeline water pressure is too high to shorten the service life of the pipeline, the purified water is prone to backflow, and automation low level problem. The present invention comprises a water delivery pipe for purified water, a first primary effect filter, a first fine filter, a reverse osmosis tank, an activated carbon filter, a centrifugal pump, a second primary effect filter, a second fine filter, a waste water collection tank, and a water supply pipe , the first booster tube, the first booster pump, the second booster tube, the second booster pump, a check solenoid valve, a pressure sensor and a PLC controller. The invention can carry out fault maintenance online, can effectively reduce the pressure in the pipeline connecting the fine filter and the reverse osmosis tank, prolongs the service life of the pipeline, saves the use cost, can effectively prevent the backflow of purified water, and can effectively improve the performance of the reverse osmosis tank Excellent reverse osmosis effect to improve purification efficiency and high degree of automation.

The invention relates to a hydraulic power machine, in particular to a device capable of generating electric energy and mechanical power by hydrodynamic force. The machine comprises hydraulic cylinders, an impeller type generator / transmission device, a liquid storage container and a liquid transfer pipe. The invention is characterized in that the number of the hydraulic cylinders is at least two, and a piston in each hydraulic cylinder is connected with a driving device; an inlet and an outlet are arranged on each hydraulic cylinder, the inlet on each hydraulic cylinder is communicated with the liquid storage container through the liquid transfer pipe, the outlet is connected with the impeller type generator / transmission device through the liquid transfer pipe, and the impeller type generator / transmission device is connected with the liquid storage container through the liquid transfer pipe; a one-way valve is arranged at the outlet of each hydraulic cylinder and is alternately opened and closed; a check valve is arranged at the inlet of each hydraulic cylinder and is alternately opened and closed; and the driving device is alternately driven. The invention utilizes energy conversion to achieve the purpose of generating electricity or outputting mechanical power and is an electric energy / mechanical power supplying system without energy inflammation, nuisance or pollution.

The invention relates to the field of data processing, and discloses an account system offline processing method and device, computer equipment and a storage medium, and the method comprises the steps: obtaining a service request sent by a client, the service request comprising user identity information and a service application type; judging whether the account management system is available or not, if not, calling an offline data storage library to carry out account system offline processing on the service request, and setting a supplementary processing label for the processed data; judgingwhether the account management system is available or not, and if yes, forwarding the data with the supplementary processing label in the offline data storage library to the account management systemfor supplementary processing; and processing the data with the supplementary processing label, and storing the data in an account management system database. By adopting the method, the client APP canprovide the user service uninterruptedly, the experience of using the account by the user is improved, and the customer complaint rate is reduced.

The invention relates to an aerial fog diffuser and a production method. The aerial fog diffuser is a hollow cylindrical pipe and comprises a left base, a right base, a cylindrical pipe body, a cavity, an air inlet pipe and an outer wrapping film, wherein the outer wrapping film tightly covers the outer layer of the cylindrical pipe body along the outer diameter of the cylindrical pipe body, and the outer wrapping film sequentially comprises a fish wire net layer, a non-woven fabric layer, a micro-nanometer film layer and a base layer from the outermost layer to the innermost layer. The top of the pipe body of the aerial fog diffuser is provided with one or two grooves in parallel in the axial direction, the center of each groove is provided with air outlet holes communicated with the cavity, air entering the cavity through the air inlet pipe is evenly diffused in the grooves through the air outlet holes, and micro-nanometer aerial fog is produced through the outer wrapping film. Air is provided for multiple aerial fog diffusers through a split type oxygenerator (pressure is 1.5-7kg / cm<2>) or an air compressor, and each aerial fog diffuser can produce the micro-nanometer aerial fog with the pressure being 0.01-0.05MPa.

The invention discloses a method for designing a steam turbine protective system power source. The method comprises the following steps that 1, power sources of a main programmable controller and an auxiliary programmable controller are each designed to be the two modes of switching and non-switching; 2, power sources of I / O clamping pieces are supplied in a concentrated mode through a bottom plate; 3, power source inquiry of a switching value input contact and an intra-system dry contact adopts redundant arrangement; 4, a power source of a tripping electromagnetic valve adopts the two modesof switching and non-switching; 5, power sources of illumination, a fan, an overhaul socket in a steam turbine protection control cabinet are independently supplied; and 6, a power source alarm system is supplied by an independent power source. According to the method for designing the steam turbine protective system power source, the typical, normative and practical design method is suitable fora large steam turbine protective system power source, and the risk problem of protection maloperation or refuse operation of steam turbine main equipment caused by a protective system power source design defect is solved.

The invention discloses a multi-linked type softened water control valve system and a control method thereof. The softened water control valve system comprises at least two softened water control valves arranged in parallel, wherein a water outlet of each softened water control valve is provided with a flow meter and an electromagnetic valve; the flow meter is used for measuring the water yield of the softened water control valve; the electromagnetic valve is used for closing the water outlet of the softened water control valve; the softened water control valve, the flow meter and the electromagnetic valve are respectively connected with a control system by a data line; and the control system is used for counting data of water yield of the softened water control valves and sending control signals to the softened water control valves. The multi-linked type softened water control valve system and the control method disclosed by the invention have the advantages that multiple softened water valves are connected into a same pipeline, at most one softened water control valve is arranged at the regenerative position, other control valves are locked at the working position, so that continuous softened water supply can be guaranteed; the linkage between the softened water control valves and the electromagnetic valves of the water outlets is realized by the control system, so that no entry of hard water from the water outlets into a water discharging pipeline in the process of regeneration is guaranteed, and the quality of softened water is guaranteed.

The station (20) has a stroke movable lower tool (23) cooperating with a stroke movable upper tool (21) for separating copies of sheets, where the tools are coupled with each other by a coupling device. Sheets (6) are transported by a sheet transportation system (7) in a sheet transport plane (E) in the station. The coupling device is provided for temporary mechanical connection of the stroke movable lower tool with the upper tool. A machine drive (17) is connected with the stroke movable upper tool for stroke movement of the upper tool. Independent claims are also included for the following: (1) a flat bed sheet punching- and / or -embossing press comprising a depositing and copies separation station (2) a method for deposition of intermediate sheets on a delivery stack.

The invention relates to a domestic hot water and air conditioning (cooling or heating) supply device, in particular to an integrated heating device linking a solar thermal collector, an air source heat pump and a medium- high temperature water-source heat pump and belongs to the technical field of thermal utilization. The tri-link device comprises the air source heat pump 1, the solar thermal collector, a fan coil, a floor heating system, an auxiliary electric heating device, a water pump, a water tank, a piping system, a valve system, a flowmeter system, a control system, a power source, a cable and a heat exchanger. The device of the invention fully utilizes the renewable energy, saves energy, reduces pollutant discharge and use-cost, has simple structure, is safe, stable and reliable,and can supply 55-60 DEG C of hot water continuously for daily life and can realize cooling in summer and heating in winter.

The invention relates to an online gas humidifying device and an online gas humidifying method for an industrial furnace. The device comprises a humidifying tank and a water adding tank, wherein a heating tube and a gas inlet channel are arranged in the humidifying tank; a water injecting hole and a gas outlet channel are arranged on the upper part of the humidifying tank; the lower part of the humidifying tank is provided with a water draining hole; the heating tube is positioned on the bottom of the humidifying tank; the inlet of the gas inlet channel extends to the outside of the humidifying tank, and is communicated with a gas source; the outlet of the gas inlet channel is adjacent to the heating tube; the gas outlet channel is communicated with a gas inlet of the furnace cavity of the industrial furnace; the water injecting hole is communicated with the water adding tank through a hose; a gas inlet tube and a water adding tube are arranged on the water adding tank; and valves connected on the gas inlet channel, the water injecting hole, the water draining hole, the gas outlet channel, the gas inlet tube and the water adding tube. The online gas humidifying device can effectively improve the condition that online humidifying and water-adding cannot be realized in the prior art, and has the characteristics of being simple in structure, efficient and reliable.

The invention discloses an emergent delivery assisting device convenient for gynaecology and obstetrics to use, and relates to the field of medical equipment. The emergent delivery assisting device comprises driving cylinders, wherein each driving cylinder is fixed to the outer side of the lower surface of a corresponding supporting column through a corresponding screw; a water tank is fixedly welded to a middle position of the lower surface of a table plate; a heating disk and a temperature sensor are arranged on the lower surface and the right wall of the inner part of the water tank, respectively; a duct is arranged at the upper end of the left surface of the water tank; the upper end of the duct penetrates through the table plate and extends to the upper side of the table plate; a tapis arranged at the lower end of the right surface of the water tank; vertical plates are fixedly welded to edge positions on the front side and the rear side of the upper surface of the table plate; aconnecting rod is fixed to the front end of each vertical plate; a sliding block is arranged in each connecting rod; a vertical rod is fixed to the upper surface of each sliding block; a knee bendingplate is fixed to the upper end of each vertical rod; a screw rod is arranged at the rear end of each vertical plate; and the front end of each screw rod penetrates through the corresponding verticalplate and extends into the corresponding vertical rod. The emergent delivery assisting device disclosed by the invention can supply hot water in real time, so that the opening size of the legs of a lying-in woman is convenient to adjust through the screw rod, the child bearing posture of the lying-in woman is adjusted, the lying-in woman can apply force, and the pain of the pregnant woman is relieved.

The invention relates to a decision-making method for ordering aviation equipment maintenance equipment based on importance and inventory limit, which includes the following steps: acquiring the influence degree of maintenance equipment on flight missions, maintenance equipment financing, maintenance equipment consumption and maintenance equipment unit price information, and establishing Importance evaluation model to obtain the importance A of maintenance equipment; establish an importance level formulation model according to the importance of maintenance equipment to obtain the importance level number of maintenance equipment; establish an inventory limit model; establish an order model and an order optimization model; When ordering, the sum of the maintenance equipment on hand and the ordered quantity is within the inventory limit calculated by the inventory limit model. The invention optimizes the standard of basic failure turnover from the perspective of equipment system, ensures that the equipment stored according to the lower limit of inventory can make the good rate of aviation material guarantee of a model reach the level of actual requirements, and improves the accuracy of ordering maintenance equipment.