57results about How to "Avoid being in" patented technology

The invention discloses full-automatic opening and closing vertical supercritical fluid foaming equipment aiming at defects of high labor intensity of workers and low production safety in high-pressure operation of an existing supercritical fluid reaction device. The equipment adopts a hoop type seal mode, namely a lock end of a kettle body and a lock end of a pressure cover are fixedly locked byan annular groove of a hoop. The equipment mainly comprises a supporting frame, a power device, a vertical column A, a vertical column B, a hoop opening-closing component, a rotary arm moving device,a connection supporting plate, a rotary arm, a cover lifting limiting device, a cover push-pull device, a pressure cover component, a hoop component, a hoop locking device and a kettle component. Automatic operations in pressure cover lifting and deflecting and hoop opening, closing and locking are realized, and automatic lifting of the pressure cover and automatic locking and opening of the hoopare realized by cooperation of proximity sensors and limiting plates. Work intensity of operators is automatically relieved, production efficiency is improved, and safety in operation is improved. Theequipment is suitable for high-pressure supercritical processing of materials.

The invention relates to an application method of an overhead type in-situ infrared analytic system. Gas enters into a reaction tube through a gas inlet and penetrates through a sample catalyst bed layer, the gas is reacted with the sample catalyst in the presence of an outer field or under the condition of no outer field, and the gas after reaction enters into a detection analyzer through a gas outlet tube; infrared light is irradiated to a reflector through a light inlet hole, enters into the sample catalyst through an infrared window after being reflected by the surface of the reflector and is reflected, refracted, scattered and absorbed for many times and returns to the surface of the reflector to form diffuse reflection infrared light; the light reflected from the surface of the reflector is irradiated to a spectra collection analyzer from a light outlet hole, and the spectra collection mode is a diffuse reflection mode; on the premise of not damaging the form of the sample catalyst, in situ spectral analysis on reaction with intervention of the outer field can be carried out, and meanwhile, the performance of the sample catalyst can be evaluated.

The invention relates to a powder concentrator integrating the functions of scattering, drying and grading into a whole, which mainly comprises a drying area casing, a scattering area casing, a raw material splitting tube, a splitting device, a volute body, a grading rotor, a main shaft and a main bearing bracket. The powder concentrator is characterized in that the drying area casing is in a V-shaped structure, one side of the drying area casing is joined with the volute body, the upper part of the other side of the drying area casing is connected with the scattering area casing which is slantways arranged, and the upper part of the scattering area casing is connected with the raw material splitting tube in which the splitting device is arranged. An eccentric position in the volute body is vertically provided with the grading rotor which is in a conical structure, and a cantilever of the main shaft of the grading rotor is supported on a bearing pedestal on the main bearing bracket. The invention has the advantages of good material adaptability, strong drying and scattering capabilities, high powder concentration efficiency, low pressure loss of a system, small maintenance quantity of equipment, compact and reasonable structure, large adaptability to materials and the like.

The invention discloses a method for combining an RAID. The method for combining the RAID is applied to a storage management software system. The method comprises the steps of displaying a three-dimensional view of a hard disk in a storage system after an instruction for adding an RAID group is received, wherein the three-dimensional view comprises the position of the hard disk, and the position of the hard disk corresponds to the actual physical position of the hard disk one to one; combining the RAID according to the three-dimensional view of the hard disk in the storage system. As is shown, by means of the method for combining the RAID, in the operation process of selecting the hard disk in the RAID group, the position of the hard disk can be clearly seen through the three-dimensional view of the storage system, which makes it convenient for a user to avoid that the selected hard disks are in the same node with purpose during selection, and the security of data is improved. Meanwhile, the process of selecting the hard disk in the RAID group is more visual, and the difficulty in deploying operation is lowered. The invention further provides a system for combining the RAID and the storage management software system, and the system for combining the RAID and the storage management software system have the same advantages.

The present invention relates to a method for changing a head rope and tail rope for a shaft, including the steps of changing the head rope and changing the tail rope; the step of changing the head rope includes the steps such as providing a new rope from a balance weight side wellhead to a cage side wellhead, separating the new head rope temporarily, providing a new rope below the wellhead, carrying out balance weight side heading and carrying out cage side heading; the time for changing the head rope and tail rope is significantly shortened, and vertical deviation of a board during driving is relieved since head rope changing sequence is changed; the tail rope is changed by winding stably at the wellhead and paying off from top to bottom, all rear heads of the tail rope are manufactured on a ground, staff is avoided being in a severe environment when making rope tail heads at the bottom, and operation safety is improved. The method also provides reduced continuous operation intensity for workers and better coordinated production.

The invention belongs to the technical field of medical equipment, and discloses a novel interventional catheter which comprises a fixed catheter, a rotary catheter, a guide part and a branch catheter, the rotary catheter and the fixed catheter are coaxially arranged, and the rotary catheter is arranged at the front end of the fixed catheter in a sealed and rotary mode; the guide part is arranged at the front end of the rotary catheter, and a channel of the guide part is arc-shaped; and at least one branch catheter is arranged on the side wall of the fixed catheter. The invention further discloses an interventional surgical robot. According to the invention, the structure design is reasonable, orderly arrangement and orderly control of different catheters or guide wires can be effectively achieved, so that a complete surgical operation is achieved through the surgical robot, and technical support is provided for further development of the surgical robot in the medical field.

The invention discloses an automobile stamping mechanism capable of automatically demolding and feeding. The automobile stamping mechanism capable of automatically demolding and feeding comprises a supporting plate, wherein supporting legs are fixedly arranged at the four corners of the lower surface of the supporting plate correspondingly; a material frame is fixedly connected onto the supporting plate; a stamping part is placed in the material frame; a mounting plate is mounted on the supporting plate; an air cylinder is mounted on the upper surface of the mounting plate; the lower end of the air cylinder penetrates through the lower surface of the mounting plate so as to be connected with a stamping plate; a die groove is formed in the lower part of the stamping plate and is formed in the upper surface of the supporting plate; and the upper end of a limiting supporting piece is arranged in the die groove. The automobile stamping mechanism capable of automatically demolding and feeding has the functions of automatic feeding and automatic demolding and discharging, limbs of workers can be prevented from being located below a stamping structure, then the working efficiency can be improved, and the workers can be prevented from being accidentally injured.

The invention discloses a remote-controllable medical oxygen generation system. The remote-controllable medical oxygen generation system comprises an air compressor, a cool dryer, an air tank, an oxygen generator, a detection tank, an oxygen tank and a central control system, wherein the air compressor, the cool dryer, the air tank, the oxygen generator, the detection tank and the oxygen tank areall sequentially connected through pipelines, filters are separately arranged on the pipeline between the air compressor and the cool dryer and the pipeline between the cool dryer and the air tank, anair detecting device is mounted at an air inlet of the oxygen generator, pressure sensors and air pressure overload protecting valves are separately mounted in the air compressor, the air tank, the detection tank and the oxygen tank, an oxygen concentration analyzer is further arranged in the detection tank, an air flowmeter and an oxygen flowmeter are separately arranged at an air inlet of the air tank and a gas outlet of the oxygen tank, the air detecting device, the pressure sensors, the oxygen concentration analyzer, the air flowmeter and the oxygen flowmeter are connected with the central control system on the basis of a communication network, and the central control system is connected with an upper computer.

The invention discloses a detachable intelligent protection device for a lithium battery. The detachable intelligent protection device comprises a protection box, a cover plate is arranged in the upper end of the protection box, damping springs are distributed on the two sides of the inner bottom face of the protection box at intervals, a rectangular supporting plate is arranged above the inner bottom surface of the protection box, fixing grooves are formed in the two sides of the supporting plate, rectangular rotating grooves are fixedly connected to the two ends of one side face of each fixing groove, each rotating groove is rotationally connected with one end of one rectangular supporting rod through a pin shaft, arc-shaped limiting blocks are fixedly connected to the two ends of the two side walls in the protection box, the other end of each supporting rod is connected with the corresponding limiting block through a rotating shaft, the two ends of the top surface of the supportingplate are fixedly connected with supporting bases, a storage box is arranged above the top face of the supporting plate, a lithium battery is placed in the storage box, a water suction pump is arranged on the top face of the supporting plate, and a cooling water tank is arranged at the position, corresponding to one side of the water suction pump, of the top face of the supporting plate. Accordingto the invention, the safety of the lithium battery is improved, the heat dissipation efficiency is improved, and the lithium battery is effectively protected.

The invention relates to an adaptive control method of a light source based on judged image pixel intensity, which is realized by adopting LabVIEW software. The method comprises the following steps: setting the light source at any intensity to illuminate a particular scene by a light source controller; correctly configuring a CCD camera on a computer to adjust the focal length and aperture of the camera; acquiring a pixel histogram of an image, and obtaining a pixel mean value; adding a brightness adjusting knob to control an adjusting knob of the light source controller in a simulation way; setting a threshold judgment interval according to the pixel mean value in the histogram, taking the interval as a judgment standard, and when the pixel mean value is greater than the threshold interval, then judging that the lighting is too strong, otherwise, judging that the lighting is deficient; and according to a judgment result, adopting a corresponding operation to adjust the illumination intensity of the light source by an output end.

The invention relates to a control method and a control system of a variable-frequency air conditioner, the variable-frequency air conditioner. The method comprises the following steps that S1, the air conditioner is powered-on to stably run a minutes; S2, the indoor environment temperature Tc is detected; S3, when the air conditioner is in a constant-temperature refrigeration mode and the Tc is less than or equal to Tset 1, or the air conditioner is in a constant-temperature heating mode and the Tc is larger than or equal to Tset 2, the absolute value Te of the temperature difference betweenTs and Tc is calculated; S4, under the constant-temperature refrigeration mode, if the Te is less than or equal to T1 for continuous n times in a preset time period, then the Ts is increased to Ts', and the air conditioner is enabled to continuously run for b minutes, or under the constant-temperature heating mode, if the Te is less than or equal to T2 for continuous n' times in a preset time period, then the Ts is reduced to Ts", and the air conditioner is enabled to continuously run for b' minutes; and S5, after the air conditioner runs continuously for the b minutes, the Ts' or the Ts" is restored to the TS, and after the air conditioner runs c minutes, the S2 to the S5 are repeated. According to control method the of the variable-frequency air conditioner, the comfort level of a user is improved, and energy conservation is realized.

The invention provides a multichannel 5G base station testing device and a multichannel 5G base station testing method. The test device comprises: a human-computer interaction control interface, a high-performance CPU processing unit, a baseband signal generation and analysis processing unit, a radio frequency transmitting extension set and a radio frequency receiving extension set; the human-computer interaction control interface is connected with the high-performance CPU processing unit, the high-performance CPU processing unit is connected with the baseband signal generating and analyzing processing unit, and the baseband signal generating and analyzing processing unit is respectively connected with the radio frequency transmitting extension set and the radio frequency receiving extension set through high-speed optical fiber interfaces. According to the invention, multi-channel testing is carried out on the uplink and the downlink of the 5G base station at the same time, so that thetesting efficiency is greatly improved, and the production period of the 5G base station is shortened; the remote control test mode can prevent testers from being in a base station operation environment for a long time, so that the harm to the testers is reduced; meanwhile, the multichannel testing device greatly reduces the production cost of the 5G base station.

The invention provides a target module and an aerodynamic measurement system applicable to millinewton vacuum plume. The target module comprises a target connection rod, a first insulation and heat insulation device, a second insulation and heat insulation device, a third insulation and heat insulation device and a round target, wherein a first end of the target connection rod is connected with a force measurement crossbeam of a force measurement stand, the first insulation and heat insulation device, the round target, the second insulation and heat insulation device, a second end of the target connection rod and the third insulation and heat insulation device are sequentially connected through assembling, and tail mounting end faces of the first insulation and heat insulation device and the third insulation and heat insulation device are positioned in through holes of the second insulation and heat insulation device. The target module has the advantages that insulation and heat insulation properties of the target and a force measurement device are ensured, aerodynamic measurement within different ranges is achieved, the requirements of different electric thrusters can be met, and the target module is high in precision, simple in structure and easy to implement.

Disclosed are an efficient-type corn niblet powder-making and caking-making system and a corn cake preparing method. The efficient-type corn niblet powder-making and caking-making system comprises a winnowing machine, a magnetic separator, a crushing and skinning machine, a crushing mechanism and a milling mechanism which are arranged in a treatment workshop, further comprises a batching tank anda puffing machine which are arranged in a puffing workshop, and further comprises a feeding channel and a finished product temporary storage tank. The feeding channel is formed in a downward-inclinedmode from the position, located on the outer side of the treatment workshop, of the ground, extends into the treatment workshop, and is connected with the bottom end of a first elevator in the treatment workshop. The refining effect is achieved through multi-link screening and then conveying and a multi-stage grinding and screening mechanism, so that feeding, powder-making, puffing and dischargingare conducted in different workshops, feeding and discharging are convenient to operate, the situation that operators are in the treatment workshop with loud noise is avoided, mutual interference ofpowder-making and puffing processes is avoided, noise reduction treatment is further conducted on key equipment, air pipes and an elevator channel, and the structure of the connecting position of theair pipes is improved to solve the situation of outage retention.

The invention belongs to the technical field of mechanical equipment, and particularly relates to a multi-stage grinding machine for mechanical equipment production. The multi-stage grinding machine for mechanical equipment production comprises a worktable and a top plate. A driving box is arranged at the bottom of the top plate. The side wall of the driving box is fixedly connected with a motor.The motor is electrically connected with an external power source, and the output end of the motor penetrates through the driving box and is fixedly connected with a worm. Two rotary shafts are rotationally connected with the inner side of the driving box, and the outer walls of the two rotary shafts are both fixedly connected with worm gears. The arranged motor can drive the worm to rotate, the worm drives the two worm gears to rotate, the rotary shafts can rotate in the driving box, and a rough grinding disc and a fine grinding disc are made to rotate. The transmission ratio of the worm gears and the worm is large, transmission is stable, the rough grinding disc can move up and down under the action of an electric telescopic rod, and the rough grinding disc and the fine grinding disc areprevented from being located on the same level, thereby being capable of grinding workpieces respectively.

The invention provides concrete paving equipment with a curved surface paving function, and relates to the technical field of novel paving equipment with the curved surface paving function. The concrete paving equipment comprises a curved surface adjustable paving mechanism which can achieve self-adjustment according to the radian of a constructed curved surface, and therefore the working surface of the paving mechanism is attached to the construction surface. Compared with the prior art, the concrete paving equipment with the curved surface paving function has the following advantages that screw conveying units can be combined according to different curved surfaces to form different curved surfaces, and the requirements of concrete conveying materials of various curved surfaces can be met; a sliding formwork is machined according to the shape of the curved surface, and one-time molding of the concrete can be achieved by cooperating with vibration puddling according to the requirement of the curved surface; conveying and forming of the concrete are both automatically completed through the equipment, the labor intensity of operating personnel is greatly reduced, the personnel are prevented from being in a severe environment, the production efficiency is improved, and the construction progress is accelerated.

The invention relates to a batch industrial CT detection system, which comprises a conveyor belt platform, a material carrying support frame, an industrial CT imaging device, a side pushing mechanismand a circulating conveying crane mechanism, and is characterized in that the material carrying support frame is of a foldable structure, and after a workpiece is placed on the material carrying support frame, the material carrying support frame can be subjected to self-adaptive folding degree adjustment; the industrial CT imaging device is arranged at the tail end of the conveyor belt platform; the lateral pushing mechanism laterally pushes the material carrying supporting frame carried to the tail end of the conveying belt platform and the workpiece into the industrial CT imaging device together, and after detection is completed, the material carrying supporting frame is pulled out of the industrial CT imaging device. Compared with the prior art, the batch industrial CT detection systemcan be used for large-scale inspection workshops, the constructed full-automatic detection workshop basically does not need manpower consumption, and operators are prevented from being in a radiationenvironment; the material loading support frame is used as a carrier of the whole process, so that unstable factors in sample loading and unloading are avoided, and the sample loading and unloading efficiency can be greatly improved.

The invention discloses an operating room nursing anesthetic waste gas treatment device, which comprises a machine body, a mask gas conveying pipe, a first cavity and an empty ball body, wherein the mask gas conveying pipe is installed outside the left side of the machine body, a second cavity is located at the lower end of the first cavity, a motor is embedded in the upper end of the machine body, an electric push rod is fixed in a rotating block, a fixing block is located in a groove, a limiting groove is formed in the rotating block, one end of a control rod is in shaft connection with an adjusting rod, a corrugated pipe is connected between a fixing plate and the inner wall of the machine body, a guide rod is located in a guide block, a gas inlet is formed in the middle of the lower end of the first cavity, a through pipe is installed at the lower end of a hose, and a sliding block is located in a sliding groove. According to the operating room nursing anesthetic waste gas treatment device, the suction pressure can be conveniently adjusted according to the anesthetic gas amount, the comfort of a patient is improved, and the waste gas treatment effect can be improved.

The invention discloses a timing belt wheel for a battery electric vehicle engine crankshaft. The timing belt wheel is a cylindrical gear body with powder metallurgy as a main body. The center of the gear body is provided with a center hole. A key groove is formed in the center hole. The outer peripheral wall of the gear body is provided with teeth formed in the center axis direction of the center hole. A flanged edge is arranged at the end of the gear body, integrally connected to the teeth and higher than the teeth. According to the improvement, the flanged edge is connected to tooth tops of the teeth through inclined edges; the bottom of the key groove is in an arc shape; and the surfaces of the teeth are provided with wear-proof composite layers. The invention further discloses a manufacturing method of the timing belt wheel for the battery electric vehicle engine crankshaft. The tooth structural strength is high, stress is low, and the service life is long.

The invention provides a method for printing a mark on a printed circuit board. The method comprises the steps of printing an opaque character block on a substrate, wherein the character block is larger than the profile of the mark; covering the character block with an opaque solder resist layer, wherein the solder resist layer and the character block have a color contrast or contrast characteristic; disposing a window on the solder resist layer for the mark; exposing the character block through the window portion of the solder resist layer to form the shape of the mark. The method prevents the mark form residing at the surface of the printed circuit board so as to greatly reduce the friction probability of the mark and reduce the risk that the mark is de-oiled and is not clear. The invention also provides a printed circuit board manufacturing method which comprises the method for printing the mark, and a printed circuit board manufactured by using the printed circuit board manufacturing method.

The invention discloses a test method for acquiring high-frequency response of a cable, which comprises the following steps of: inputting a steep pulse signal with a steep rising edge at the head end of the cable, connecting a matching device at the head end and the tail end of the cable in order to avoid signal reflection, and measuring overvoltage by using a high-frequency voltage measuring device; the response characteristic of the long-distance cable can be obtained by comparing the input signal and the output signal; finally, an ATP-EMTP cable line module is written based on response characteristics of a long-distance cable test result, and high-voltage cable line overvoltage is calculated, waveform distortion of a high-frequency signal in the cable propagation process is solved, cable overvoltage calculation precision is improved, the situation that the cable put into operation is in an overvoltage environment is avoided, and the reliability of the cable put into operation is improved. And the field operation reliability of the commissioned cable is improved.

The invention discloses a black-odor urban river wastewater sampling method and device. Firstly, by means of a built-in gas and liquid dual-sampling mechanism, not only can black-odor urban river wastewater be sampled, but also air above a black-odor urban river can be sampled, follow-up detection of the wastewater and the air of the black-odor urban river is facilitated, and a researcher can know whether ambient air of the black-odor urban river is affected by the wastewater; secondly, under the action of an oxygen concentration detection alarm, oxygen content can be detected and alarmed, a worker is prevented from being in an oxygen-deficient environment, and sampling safety of the worker is improved; finally, by means of a lifting mechanism, wastewater in upper layer, middle layer or lower layer of the water area can be specifically sampled as required, and accuracy of detection research is improved. With adoption of the scheme, the researcher can know the contamination status of the black-odor urban river compressively, and follow-up water pollution control is facilitated.

The invention discloses an environment-friendly feed and a preparation method thereof. The environment-friendly feed is prepared from the following raw materials in parts by weight: 600-700 parts of corn, 100-130 parts of soybean meal, 100-120 parts of bran, 4.5-6.5 parts of lysine, 2.25-3.9 parts of methionine, 3.2-4.5 parts of threonine, 0.9-1.4 parts of tryptophan, and 40-60 parts of a premix.By adopting the feed provided by the invention, the waste is reduced, the environment-friendly effect is better, and the use cost of the feed is also lowered.

The invention discloses a polycrystalline silicon wafer back polishing technology. The polycrystalline silicon wafer back polishing technology comprises the following steps: step S1, alkali liquor polishing: soaking the back of a silicon wafer with a strong alkali liquor; step S2, acid liquor polishing: taking out the silicon wafer after soaking in step S1, and soaking the back of the silicon wafer with a weak acid liquor; step S3, alkali liquor neutralization: taking out the silicon wafer after soaking in step S2, and washing the back of the silicon wafer with a weak alkali liquor; step S4, taking out the silicon wafer in step S3, and washing the back of the silicon wafer with pure water through a pressurization gun; and step S5, drying: drying the silicon wafer obtained in step S4 by using an air knife. Under the conditions that the time used in the polishing technology is shorter, the damage on the silicon wafer is lower and the washing effect of the silicon wafer is better, the back polishing effect of the silicon wafer can be effectively strengthened, the back light absorption efficiency of the silicon wafer is promoted, and then the short-circuit current of the silicon wafer and the conversion efficiency of the silicon wafer are effectively improved.

The invention relates to the technical field of blackboard erasers, in particular to an adsorption type raise dust suppression blackboard eraser. The adsorption type raise dust suppression blackboard eraser comprises a blackboard body and a water storage tank, the blackboard body at least comprises a fixing plate, a sliding groove is formed in the surface of the fixing plate, a plurality of sets of positioning springs are arranged in the sliding groove, a fixing block is installed at one end of each positioning spring and fixedly connected with the sliding groove, and a blocking piece is arranged at the other end of each positioning spring and slidably connected with the sliding groove; a sliding cavity is formed in the surface close to the sliding groove, a sliding plate is slidably connected into the sliding cavity, a shaft rod is arranged on one side of the bottom of the sliding plate, and a blackboard eraser body is connected to the surface of the shaft rod; and the bottom of the water storage tank is connected with a drainage pipe, the surface of the sliding groove is provided with a connecting opening, and the drainage pipe is fixedly connected with the connecting opening. When the blackboard eraser body rotates to a certain degree, the blocking piece can be pushed away, water flows downwards, dust generated in the wiping process is humidified to form particles, and splashing is prevented.

The invention discloses a battery connector protection device of an electric automobile and the electric automobile. The battery connector protection device of the electric automobile comprises a battery support assembly and a protection cover plate, the battery support assembly comprises a battery support used for supporting a battery and a driving part arranged on the battery support, and the driving part is configured to act under the pressure of the battery. The protection cover plate is arranged on one side of the battery support and located above the battery connector, a first side edgeof the protection cover plate is arranged close to the battery support, and a second side edge, far away from the battery support, of the protection cover plate is driven by the driving part to be close to or far away from the first side edge so that the protection cover plate can stretch out and draw back. When the battery is placed on the battery support, the driving part drives the protection cover plate to retract so as to expose the battery connector; when the battery leaves the battery support, the protection cover plate extends to enable the battery connector to be covered. When the battery needs to be replaced, the battery which runs out of power needs to be dismounted, and the protection cover plate extends to enable the battery connector to be covered.

The invention discloses second-generation nuclear power station spent fuel storage cadmium rack disassembly equipment. The equipment comprises a supporting platform which is used for supporting a cadmium rack and a disassembly component which is installed on the supporting platform; the disassembly component comprises a wrench and a drilling and milling power head; the drilling and milling power head comprises a drill bit and a milling cutter which can independently operate; and driving mechanisms are connected with the wrench, the drill bit and the milling cutter and respectively drive the wrench, the drill bit and the milling cutter to work. By using the disassembly equipment to complete disassembly of the cadmium rack, radiation on operators can be reduced, and reduction of the amount of waste and lowering of following waste disposal costs can be realized to the greatest extent.

The invention provides a vehicle microphone and a manufacturing process thereof. The manufacturing process comprises the following steps: determining an installation position of an ASIC chip on a circuit board; smearing adhesive glue in the installation position, wherein the smeared area is 60%-80% of the area of the installation position; coating the edge of the installation position with sealant; installing the ASIC chip on the bonding glue and the sealant; installing an MEMS chip on the circuit board; and welding a conductive wire between the MEMS chip and the ASIC chip to enable the MEMS chip to be electrically connected with the ASIC chip. According to the technical scheme of the invention, the adhesive is sealed between the ASIC chip and the circuit board through the sealant, therebyavoiding the reduction of the adhesive capability caused by the adhesive in an extreme environment, and improving the stability of a product.

The invention belongs to the technical field of anti-theft door locks, and particularly relates to an anti-theft door lock. The anti-theft door lock comprises a lock body, wherein the lock body comprises a shell, a handle and a lock head, four rectangular through holes are formed in the front surface of the shell at equal intervals in the circumferential direction of the lock head, clamping platesare rotationally installed at the rectangular through holes, the ends, close to the lock head, of the clamping plates are made of iron materials, the clamping plates are located in an inner cavity ofthe shell, limiting blocks are fixed at the positions, located at the rectangular through holes, of the inner cavity of the shell, electromagnets are arranged on the side walls of the limiting blocks, reset springs are fixed at the output ends of the electromagnets, and the ends, far away from the corresponding electromagnets, of the reset springs are fixed at the ends, close to the lock head, ofthe adjacent clamping plates. According to the anti-theft door lock, the clamping plates in the four directions are popped up to limit and guide a key on the hand of a user, so that the key on the hand of the user is kept at a correct angle and position, then the user can conveniently align the key, then the door opening efficiency of the user is improved, and convenience is brought to the dailylife of the user.