48results about How to "Avoid the impact of service life" patented technology

The invention discloses a mobile power source having a charge management function. The mobile power source comprises a charging interface, a charging circuit, a charging battery and a CPU. The charging interface is used for an external power supply to be accessed. The charging circuit comprises a voltage and current detection circuit and a voltage regulation circuit. The input end of the voltage and current detection circuit is connected with the charging interface and is used for detecting charging voltage and working current of the charging circuit. The CPU is connected with the voltage and current detection circuit and the voltage regulation circuit and used for controlling the voltage regulation circuit to work under the highest power of the mobile power source according to the charging voltage and the working current. The input end of the voltage regulation circuit is connected with the output end of the voltage and current detection circuit. The output end of the voltage regulation circuit is connected with the charging battery and used for charging the charging battery under the highest power of the mobile power source. By the adoption of the scheme, the influence on a mobile terminal of external current change is eliminated, and mobile power source damage caused by too high charging power and the influence on the service life of the mobile power source of the changing external power supply are avoided.

The invention provides an engine control method and device. The method comprises the following steps: when a whole vehicle is in a braking energy recovery condition, determining the power decrease change rate, corresponding to the vehicle speed and aperture of a braking pedal, of a fuel cell engine according to the preset relation between the vehicle speed and the power decrease change rate and the preset relation between the aperture of the braking pedal of the power decrease change rate; determining a demand power initial value under the braking energy recovery condition according to the SOCof a power battery and the vehicle speed; calculating a demand power target value under the braking energy recovery condition according to a charging power limit value, a braking recycle maximum power value and the demand power initial value under the braking energy recovery condition; and controlling the engine to output power according to the power decrease change rate until the output power reaches the demand power target value under the braking energy recovery condition. According to the method, the economy of the whole vehicle can be maximally increased, and the service life of a fuel cell can be prolonged.

The invention provides an energy management system for a range extending type electric car and a method thereof. The energy management system comprises a car controller, a power battery, an energy input part and an energy output part; the car controller is connected with the power battery through low-voltage wires, the energy input part and the energy output part are connected with the power battery, the energy input part comprises a range extender unit and a driving and energy recovery unit, and the energy output part comprises a high-voltage auxiliary unit and a driving and energy recovery unit. The method comprises the steps that firstly, first-order regulation is performed on the energy input part and the energy output part through thresholds; secondly, further second-order regulation is performed on the energy input part and the energy output part according to SOC, the state of charge of the power battery, and the efficiency of the energy management system is effectively improved.

The invention discloses a Z-reference plane detection and setting method for a vertical miller. The Z-reference plane detection and setting method comprises the following steps of using a probe to perform alignment of a reference processed plane and calibration, determining a positioning plane contour on a tool according to the size and the position of a part blank before measurement, selecting aplurality of sampling points as sampling positions according to a part positioning plane position by taking the positioning plane contour as a boundary, and taking an average value of Z values of thesampling points as the position of a Z-reference plane. The Z-reference plane detection and setting method provided by the invention effectively solves the problems of slow speed, poor reliability andlow accuracy of manually setting Z initial origins of a processing coordinate system in the numerical control machining process.

The invention discloses a peak clipping and valley filling optimization scheduling method for a distributed energy storage power station during photovoltaic grid connection. The optimization scheduling method comprises the following steps: 1, obtaining wind power plant group prediction information, distributed photovoltaic prediction information, load prediction information and distributed energystorage power station charge capacity information; 2, calculating a daily net load value, establishing a target function by taking the minimum daily net load variance as a target to optimize the charging and discharging power of the distributed energy storage power station, and forming a day-ahead charging and discharging plan of the distributed energy storage power station; and 3, based on the system economy and the wind power priority scheduling principle, bringing the day-ahead charging and discharging plan of the distributed energy storage power station into system power balance constraint, and establishing an objective function by taking the lowest system operation cost as a target to optimize the output of the wind power plant group and the output of the conventional unit so as to form output plans of the wind power plant group and the conventional unit. According to the invention, the net load peak-valley difference caused by distributed photovoltaic grid connection is reduced through the energy storage power station, and the power grid regulation capability is improved.

The invention provides a forced circulation evaporation-cooled device for a stator winding of a wind driven generator, which is formed by a plurality of evaporation-cooled circuits in parallel connection, wherein each evaporation-cooled circuit is connected with a plurality of circulation branches (1) in parallel; the front end of each circulation branch (1) is connected to a gas collecting tube (2) by an insulating joint (8) and a connecting pipeline (9); the gas collecting tube (2) is connected with the cooling space of a condenser (3), and the cooling space of the condenser (3) is connected with an inlet end of a liquid-returning tube (4); an outlet end of the liquid-returning tube (4) is connected to an external liquid-collecting tube (5), and the external liquid-collecting tube (5) is connected with an inlet end of a circulating pump (6); an outlet end of the circulating pump (6) is connected to an internal liquid-collecting tube (7); and the internal liquid-collecting tube (7) is connected with the back end of each circulation branch (1) by an insulating joint (10) and a connecting pipeline (11). A liquid evaporation-cooled medium is injected into the evaporation-cooled circuits.

The invention discloses a vehicle storage and rental garage and belongs to rental and storage devices. The vehicle storage and rental garage used for storing city bicycles and electric cars comprises an underground garage body, and the garage body comprises a storage unit and is characterized in further comprising a transfer track, an access control device, a main driver, a spindle, an upper horizontal strut, a lower horizontal strut and a fixed connecting sleeve; the access control device at least comprises a user identification unit and a signal receiving and emitting unit; the main driver is connected with the spindle, the spindle is connected with the upper and lower horizontal struts thereon through the fixed connecting sleeve, and a garage base is arranged at the bottom end of the spindle. By the arrangement, the city bicycles and electric cars can be stored orderly and efficiently with high space utilization, rental of the stored cars and original rental cars can be realized, the electric cars can be charged during storage, and function of the garage is improved.

The invention discloses a wear leveling method and device for Nand Flash, and the method comprises the steps: detecting a writing operation instruction, and obtaining to-be-written target data; judging whether the target data needs to be allocated with a new idle physical block or not; if a new idle physical block needs to be allocated, obtaining the idle physical block with the smallest erasure frequency in the idle queue, writing the target data into the idle physical block, and generating a data physical block; judging whether all the physical blocks meet a preset wear leveling condition ornot; if the preset wear leveling condition is met, migrating the data of the data physical block with the minimum erasure frequency into the idle block with the maximum erasure frequency in the idlequeue to generate a target data block; and repeating the operation until all the physical blocks meet the preset wear leveling condition. According to the embodiment of the invention, the service lifeof the flash memory can be maximized, the influence of data randomness on the service life of the flash memory is solved, and the erasure frequency of each physical block is recorded under the condition of not consuming a large amount of memory resources.

The invention discloses a battery temperature control device. A cooling device and a heating device are attached to two opposite sides of a battery module respectively, a temperature detection devicedetects the temperature of the battery module, and when the collected temperature meets the cooling condition, a controller controls a channel control switch to be switched to a first communicating state and controls a liquid in an external liquid storage device to be cooled and flow into the cooling device through the channel control switch so as to reduce the temperature of the battery module. When the collected temperature meets the heating condition, the controller controls the channel control switch to be switched to a second communicating state and controls the liquid in the external liquid storage device to be heated and flow into the heating device through the channel control switch so as to increase the temperature of the battery module. By means of the battery control device, thetemperature of the battery module can be decreased and can be increased, the working performance of the battery module is ensured and the influence on the service life is avoided.

The invention discloses a lithium ion battery pack provided with an overload protection device and a preparation process of the lithium ion battery pack. The lithium ion battery pack comprises a box cover, a handle, a material injection port, a box body, an air inlet, a filter screen, a thermometer, an exhaust port, a lithium battery, a sealing layer, a first fixing rod, a second fixing rod, a drypowder layer, a sliding rail, a fan, a limiting ring, a first fixing block, a second fixing block, a locking block, a second groove, a third groove, a sliding block and a through hole; according to the invention, external cold air is pumped into the box body through a motor; heat emitted by the lithium battery pack is blown out from an air outlet; a large amount of heat generated by overload of the lithium battery pack can be dissipated timely; through the design of the sealing layer and the dry powder layer on the box cover, fire disasters caused by the lithium battery pack are avoided, theuse safety of the device is improved, the quick assembly of the lithium battery is realized through the locking block after the sliding block is inserted into the third groove in the sliding rail, inaddition, the disassembly is convenient after the assembly, and the practicability of the device is greatly improved.

The invention discloses a protection method for safe charging of an electric car. The method specifically includes the steps of A, over-current protection, B, over-voltage and under-voltage protection, C, over-temperature protection, D, unearthed and live and null wire phase protection and E, earth leakage protection; whether the over-current protection is carried out is determined according to the time of duration of an over-current state; whether the over-voltage and under-voltage protection is carried out is determined according to the time of duration of an over-voltage or under-voltage state; according to the over-temperature protection, the magnitude of charging current is indirectly adjusted by adjusting communication data with a vehicle through an alternating current charging device according to the temperature rise state when a power supply end is plugged; according to the unearthed and live and null wire phase protection, after the alternating current charging device is powered on, whether a power supply wiring state is correct is detected in real time, namely whether earthing is reliable and whether phase dislocation of a live wire and a null wire of the power supply end occurs are detected, and on-off control over a charging power source is carried out according to actual application requirements; according to the earth leakage protection, after the alternating current charging device is powered on, the magnitude of leakage current between the live wire and the null wire and a ground wire in the whole alternating current supply process is detected in real time, and when the leakage current exceeds a set threshold value, charging power supply is cut off. Safe charging is ensured.

The invention discloses an illumination control device, which comprises a first circuit and a second circuit that are connected in parallel, wherein the first circuit is provided with a light-operated switch and a first relay which are connected in series; the second circuit is provided with a first normally-closed switch, a starting switch and a second relay which are connected in sequence and in series and matched with the first relay, and the second circuit is further provided with a conversion switch connected with the normally-closed switch in parallel and a first normally-opened switch matched with the second relay. The illumination control device provided by the invention is provided with the circuit matched with the light-operated switch, and realizes multiple control modes of illumination, comprising an automatic control mode and a manual control mode; the light-operated switch cannot be influenced when being in the automatic control mode; and in cloudy days, the conversion switch is converted into the manual control position to realize that an illumination device is normally brightened, so that frequency starting is not needed and the service life of the illumination device cannot be influenced.

The invention discloses a dehumidification power distribution cabinet. The cabinet comprises a base and a box body mounted at the upper end of the base, a plurality of fans are fixed at the inner bottom of the box body; two ventilation grooves are symmetrically formed in the side wall of the box body; ventilation holes are formed in the inner walls of the two ventilation grooves in a penetrating mode, opening and closing push rods are fixed to the inner walls of the ends, away from the corresponding ventilation holes, of the two ventilation grooves, sealing plates are fixed to the extending ends of the two opening and closing push rods, and a humidity sensor and a temperature sensor are fixed to the inner top of the box body. The method has the advantages that the method is simple; the timing motor drives the screw rod to rotate; therefore, the sliding block moves upwards; the timing purpose is achieved; and if the internal humidity of the box body is controlled in the time period whenthe sliding block moves upwards to the top, it shows that the external humidity is not increased continuously, the internal operation of the box body is normally carried out, and if the humidity is not quickly controlled, the sealing plate seals the ventilation hole, so that external humid air is prevented from entering the box body, and the internal humidity of the box body is not increased anymore.

The invention discloses a novel automobile front combination lamp, and particularly relates to the field of automobile spare parts. The novel automobile front combination lamp comprises a mounting plate, wherein an automobile front combination lamp body is mounted in the middle of the side face of the mounting plate, a connecting block is detachably mounted on the edge of the side face of the mounting plate through screws, and a fixed block is welded to the other side of the connecting block; a buffer groove is formed in the fixed block, and a mask body is movably clamped to the side face of the buffer groove. By arranging the positioning assembly, when an automobile is in a normal running state, the limiting block is in a fixed state, and once the automobile collides and exceeds the adhesive force of the connecting adhesive layer, the connecting adhesive layer falls off from the position between the positioning sleeve rod and the positioning slender rod, so the positioning slender rodand the positioning sleeve rod are changed into movable sleeving from a fixed sleeving state; at the moment, the impact force of the limiting block is removed through the spring, the influence of jolt generated in the normal state of an automobile on the service life of the mask body is avoided, and the problem that the mask body is damaged due to overlarge external force is solved.

The invention provides a forming method of a metal interconnection structure. A first through hole is formed through wet etching firstly, then a second through hole is formed through dry etching, thefirst through hole is communicated with the second through hole, the first through hole is located above the second through hole, and due to the fact that the opening size of the first through hole islarger than that of the second through hole, The overall depth and width of the first through hole and the second through hole after communication are reduced, and when a metal film layer and a protective layer are formed subsequently, protective layer residues do not appear on the surface of a top metal plug, so that influence of the protective layer residues on the product yield during subsequent packaging is avoided, and influence of the service life of the electrical test equipment (probe) during the WAT test is also avoided.

Provided is an integrated water-coal-slurry burner. A burner head is arranged at one end of a burner body, and an ignition device is arranged at the other end of the burner body. An electric ignitionsystem is additionally arranged in central oxygen of a typical water-coal-slurry process burner to form a concentric four-sleeve structure, fuel gas (combustible gases such as natural gas, liquefied gas, purge gas and the like) and oxygen are ignited by a high-energy ignition rod to form an ignition flame, then the gas flow is adjusted to form a larger flame, after the starting condition of a gasification furnace is met, coal water slurry is put for combustion, and then operation is carried out according to the working condition of the typical coal water slurry process burner, namely, the ignition starting of a refractory brick heat storage chamber of a hot wall furnace is improved into water-cooled wall fire ignition type starting ignition, so that the integrated working process of ignition, starting and the process burner is achieved, and the investment, operation and maintenance costs of enterprises are greatly reduced.

The invention provides a liquid carbon dioxide supplementing and supercharging device. The liquid carbon dioxide supplementing and supercharging device comprises a carbon dioxide storage tank, a reciprocating booster pump, a supercharging buffering tank, a foaming agent metering and injecting system and an extruder. The top end and the bottom end of the carbon dioxide storage tank are connected with the reciprocating booster pump through pipelines, the reciprocating booster pump is provided with a hydraulic motor and connected with the supercharging buffering tank through a pipeline, a pressure sensor is arranged at the top end of the supercharging buffering tank, a pressure sensor and a safety valve are arranged on the two sides of the pressure sensor respectively, a heating device is arranged at the bottom end in the supercharging buffering tank, a weighing sensor is arranged in the center of the top end outside the supercharging buffering tank, the supercharging buffering tank is connected with the foaming agent metering and injecting system through a pipeline, the foaming agent metering and injecting system is connected with the extruder through a pipeline, and stop valves are arranged on all the pipelines. The liquid carbon dioxide supplementing and supercharging device has the advantages that the system is stable, and cost is low.

The invention relates to a large-diameter circular knitting machine rotation period prediction method and system using an adaptive filter, and aims at the phenomenon that the rotation period of a large-diameter circular knitting machine is unstable in the actual production in the textile industry. The filter combines the advantages of an RLS period prediction algorithm and a single step period prediction algorithm, the rotation period of the large-diameter circular knitting machine in the actual production can be effectively and accurately predicted. The method and system of the invention areclosely combined with a defect detection visual system, the prediction period can be quickly and accurately obtained through real-time analysis and adaptive filtering process of a serial port signal,the prediction period can be used to calculate the rotational speed of the large-diameter circular knitting machine, an image that needs to be captured by the defect detection visual system is positioned, defects in the entire batch fabric are also positioned, and a basis is laid for the realization of a highly effective gray cloth detection system. The method and system of the invention can quickly and accurately predict the period of the large-diameter circular knitting machine, reduce the difficulty of accurate capture of the defect detection visual system, and improve the positioning accuracy of the defects.

The invention discloses an LED (light-emitting diode) constant-current driving power supply which is simple in structure, high in power factor and wide in input / output voltage range and can reduce the utilization cost. The LED constant-current driving power supply is provided with an EMI (Electro-Magnetic Interference) filter circuit, wherein after being subjected to voltage division by a voltage division circuit, the output of the EMI filter circuit is connected with a power factor correcting circuit; a zero current detecting circuit and an output circuit are connected with the power factor correcting circuit; the output circuit feeds back a current signal to the power factor correcting circuit through a current detecting circuit; and the output circuit also respectively feeds back undervoltage and overvoltage signals to the power factor correcting circuit through an undervoltage detecting circuit, an undervoltage feedback circuit, an overvoltage detecting circuit and an overvoltage feedback circuit correspondingly.

The invention relates to an auxiliary argon blowing apparatus based on bottom argon blowing of a LF furnace, an argon blowing method of the auxiliary argon blowing apparatus, and a bottom-argon-blowing LF furnace equipped with the auxiliary argon blowing apparatus. The auxiliary argon blowing apparatus based on bottom argon blowing of the LF furnace comprises an argon blowing gun used for argon blowing into the furnace, wherein the argon blowing gun is connected with an argon supply pipeline and a driving mechanism used for driving switching of the argon blowing gun between an out-of-furnace standby station and an in-furnace working station; and the argon supply pipeline is provided with a flow control unit. The auxiliary argon blowing apparatus provided by the invention can realize timelyauxiliary argon blowing into the LF furnace in the case of insufficient or failed bottom argon blowing of the LF furnace, thereby guaranteeing smooth implementation of production, preventing influence on the service life of ladles due to excess increase of bottom-blowing argon flow and avoiding ladle-to-ladle operation or molten steel degradation.

The invention discloses a load drive circuit capable of protecting surge current, which comprises a switching circuit, a conversion controller, a load drive adjuster and a surge current protective circuit, wherein the switching circuit is used for being coupled with an input power, and providing a driving power for driving a load at an output end; an output capacitor of the switching circuit is coupled with the output end; the conversion controller controls the size of the driving power provided by the switching circuit according to current or voltage of the load; the load drive adjuster is connected with the load in series at the output end of the switching circuit for regulating and controlling the electrical property state of the load; and the surge current protective circuit is coupled with a link point between the load drive adjuster and the load and the output capacitor so as to provide a one-way electric charge conduction path for the output capacitor.

The invention discloses an enhanced nitrification process based on coupled demolding, and belongs to the technical field of sewage treatment. In the sewage nitrification process, under a condition ofkeeping a certain content of dissolved oxygen in a system, extrusion treatments are carried out on an elastic filler so as to generate different deformation degrees, in each extrusion treatment, deepextrusion and shallow extrusion are coupled; deep extrusion is carried out when the system load decreases, the effluent quality is close to an index value, or the system resistance exceeds a designedinflow water distribution pressure; and shallow extrusion is carried out when the system load is stable. Through the combination of deep extrusion and shallow extrusion, on one hand, demolding and redistribution of a bio-membrane filler can be realized, the mass transfer efficiency is improved, on the other hand, dissolved oxygen inside and outside the bio-membrane filler can be distributed more uniformly, through the synergistic effect of deep extrusion and shallow extrusion, the nitrification reaction is enhanced, the sewage treatment efficiency is improved, and the effluent quality is recovered.

A control method for a vacuum tapping switch is successively performed through eight steps. After a main moving contact and an auxiliary moving contact are guaranteed to accurately contact static contacts, corresponding vacuum switches are connected then; and before the main moving contact and the auxiliary moving contact are separated from the static contacts, the corresponding vacuum switches are disconnected in advance, a position where an electric arc may occur is moved into a vacuum tube, and a gear shift is completed. The method has a substantial arc-extinguishing effect and prolongs the service life of the tapping switch.

The invention discloses a dehumidification power distribution cabinet, which comprises a base and a box installed on the upper end of the base, a plurality of fans are fixed on the inner bottom of the box, and two ventilation slots are symmetrically opened on the side wall of the box. The inner walls of the two ventilation slots are provided with ventilation holes, and the inner walls of the two ventilation slots away from the corresponding ventilation holes are fixed with opening and closing push rods, and the extension ends of the two opening and closing push rods are fixed. There is a closing plate, and a humidity sensor and a temperature sensor are fixed on the inner top of the box. The advantage is that the timing motor drives the screw to rotate, so that the slider moves up to achieve the purpose of timing. If the internal humidity of the box is controlled during the time period when the slider moves to the top, it means that the increase in external humidity is not continuous Yes, the internal operation of the box is normal. If the humidity is not quickly controlled, the closing plate will close the ventilation holes to prevent external humid air from entering the inside of the box, so that the humidity inside the box will no longer increase.

The invention discloses a process for strengthening nitrification treatment based on coupled type stripping and belongs to the technical field of sewage treatment. During the nitrification treatment process of sewage, under the condition of maintaining a certain content of dissolved oxygen in the system, the elastic filler is subjected to extrusion treatment with different degrees of deformation. The extrusion treatment includes the coupling of deep extrusion and shallow extrusion. , the deep extrusion is carried out when the system load drops, the outlet water quality is close to the target value or the system resistance exceeds the design inlet water distribution pressure, and the shallow extrusion is carried out when the system load is stable. The present invention combines deep extrusion and shallow extrusion, on the one hand, it can realize the release and redistribution of the biofilm filler, improve the mass transfer efficiency, and on the other hand, it can promote a more uniform distribution of dissolved oxygen inside and outside the biofilm filler. The synergistic effect of the two can strengthen the nitrification reaction, improve the efficiency of sewage treatment, and restore the quality of effluent water.

The invention relates to a CFRP-steel combined cable structure, which comprises a sheath, a plurality of parallel steel wires and an internal CFRP cable strand are arranged in the sheath, an insulating permeable cladding is arranged on the surface of the internal CFRP cable strand, the parallel steel wires are electrically connected with the negative electrode of a rectifier, the internal CFRP cable strand is electrically connected with the positive electrode of the rectifier, and the rectifier is connected with a power source; the invention further discloses an electrochemical anti-corrosion method utilizing rainwater to conduct electricity, rainwater enters the sheath through the damaged part on the sheath and forms an electric connection path after flowing through the parallel steel wires and the internal CFRP cable strands, and the rectifier is matched with the power source to apply external potential to the internal CFRP cable strands to form cathode protection. The corrosion can be effectively inhibited, and the service life of an existing cable is greatly prolonged.

The invention discloses a novel raw material feeding lifting device and method for a frame type sawing machine. The lifting device comprises a power transmission mechanism, feeding lifting mechanisms and a lifting working table mechanism. The power transmission mechanism provides driving force and movement for the whole lifting device and transmits the driving force and the movement to the feeding lifting mechanisms. The feeding lifting mechanisms are divided into four groups, are located at four corners of the lifting working table mechanism and transmit the driving force and the movement which are provided by the power transmission mechanism to the lifting working table mechanism, and the lifting the lifting working table mechanism is achieved. The lifting working table mechanism is used for bearing stone raw materials and guaranteeing stability of the stone raw materials in the lifting process.

The invention discloses a battery temperature control device. A cooling device and a heating device are attached to two opposite sides of a battery module respectively, a temperature detection devicedetects the temperature of the battery module, and when the collected temperature meets the cooling condition, a controller controls a channel control switch to be switched to a first communicating state and controls a liquid in an external liquid storage device to be cooled and flow into the cooling device through the channel control switch so as to reduce the temperature of the battery module. When the collected temperature meets the heating condition, the controller controls the channel control switch to be switched to a second communicating state and controls the liquid in the external liquid storage device to be heated and flow into the heating device through the channel control switch so as to increase the temperature of the battery module. By means of the battery control device, thetemperature of the battery module can be decreased and can be increased, the working performance of the battery module is ensured and the influence on the service life is avoided.

The invention discloses a protection method for safe charging of an electric car. The method specifically includes the steps of A, over-current protection, B, over-voltage and under-voltage protection, C, over-temperature protection, D, unearthed and live and null wire phase protection and E, earth leakage protection; whether the over-current protection is carried out is determined according to the time of duration of an over-current state; whether the over-voltage and under-voltage protection is carried out is determined according to the time of duration of an over-voltage or under-voltage state; according to the over-temperature protection, the magnitude of charging current is indirectly adjusted by adjusting communication data with a vehicle through an alternating current charging device according to the temperature rise state when a power supply end is plugged; according to the unearthed and live and null wire phase protection, after the alternating current charging device is powered on, whether a power supply wiring state is correct is detected in real time, namely whether earthing is reliable and whether phase dislocation of a live wire and a null wire of the power supply end occurs are detected, and on-off control over a charging power source is carried out according to actual application requirements; according to the earth leakage protection, after the alternating current charging device is powered on, the magnitude of leakage current between the live wire and the null wire and a ground wire in the whole alternating current supply process is detected in real time, and when the leakage current exceeds a set threshold value, charging power supply is cut off. Safe charging is ensured.

The invention discloses a novel raw material feeding lifting device and method for a frame type sawing machine. The lifting device comprises a power transmission mechanism, feeding lifting mechanisms and a lifting working table mechanism. The power transmission mechanism provides driving force and movement for the whole lifting device and transmits the driving force and the movement to the feeding lifting mechanisms. The feeding lifting mechanisms are divided into four groups, are located at four corners of the lifting working table mechanism and transmit the driving force and the movement which are provided by the power transmission mechanism to the lifting working table mechanism, and the lifting the lifting working table mechanism is achieved. The lifting working table mechanism is used for bearing stone raw materials and guaranteeing stability of the stone raw materials in the lifting process.