285 results about "Electrical engineering technology" patented technology

The invention belongs to the technical field of electric appliances and electric engineering, and relates to a multifunctional modularized lithium electric cooker. An embedded handle is embedded in an upper cover with a heat-preserving layer, the middle of the upper cover with the heat-preserving layer is provided with an air outlet hole, a lateral thermoelectric film is attached to the outer side of a barrel-shaped outer container, and a barrel-shaped inner container is arranged on the inner side of the barrel-shaped outer container; an inner container upper cover covers the top of the barrel-shaped inner container, and the lower end of the barrel-shaped inner container is provided with a strainer; the barrel-shaped outer container is arranged on an inner and outer container supporting frame, the inner and outer container supporting frame is disposed on a bottom support, the center of the bottom support is provided with a bottom cooling air hole, a bottom thermoelectric film is attached to the surface of the bottom support, and the lower portion of the bottom support is provided with a lithium battery; a power supply cover plate is disposed on the outer side of the lithium battery; the inner side of the bottom of a shell is provided with a fan, and a bottom heat-preserving pad is arranged on the outer side of the bottom of the shell; one side of the barrel-shaped outer container is provided with a temperature sensor connected with a temperature display and control unit, and the shell is provided with the temperature display and control unit and a clock displaying, timing and setting unit. The multifunctional modularized lithium electric cooker is simple in structure, multifunctional, convenient to carry, safe to use, convenient to repair and maintain, high in utilization rate and good in heat preservation.

The present invention relates to the technical field of electrical engineering and discloses a PRBS disturbance injection-based power grid impedance online identification device. The device is mainly composed of a grid-connected inverter, a current loop controller, a sampling device and an impedance identification unit. The device is characterized in that the grid-connected inverter is connected with the current loop controller. When the grid-connected state is stable, the grid-connected inverter injects the PRBS disturbance into the power grid. During the injection process of a PRBS signal, a built-in output voltage THD is fed back to the controller, so that the THD value of the output voltage of the inverter is ensured to be smaller than 5%. The sampling device is connected with the PCC part of the power grid and is used for sampling and recording the voltage and the current at the PCC part of the power grid. The impedance identification unit is used for subjecting the sampled data of the sampling device to DFT analysis, and taking the average value of the amplitude and the average value of the phase of each harmonic component of the voltage and the current during the current sampling period. The method of the invention is high in precision, high in speed, strong in real-time property, wide in frequency range, lower in measuring cost and difficulty, and better in stability.

The invention relates to a neutral point direct-current restrainer of ground transformer, wherein it comprises blocking capacitor, thyristor solid switch connected to two ends of blocking capacitor, relative trigger unit, limit resistance, and bypass switch. The invention can effective restrain the neutral point direct current caused by high-voltage direct current, etc, to reduce noise, overheat, etc. And it has simple process and low cost, without external reverse voltage.

The invention provides a power grid micro meteorology calamity monitoring early warning system and an early warning method, relating to the electrical engineering technology field. The power grid micro meteorology calamity monitoring early warning system comprises a micro meteorology monitoring sub-platform, a micro meteorology calamity prediction sub-platform, a micro meteorology calamity early warning sub-platform and a system management sub-platform. The early warning method comprises steps of: obtaining meteorology data and micro meteorology data of a power transmission line from a monitoring device, performing icing prediction and wind deflection prediction according to the micro meteorology data to obtain an icing prediction area distribution result and a wind deflection prediction area distribution result, Q3 performing icing early warning level dividing and wind deflection early warning level dividing according to the icing prediction area distribution result and the wind deflection prediction area distribution result, and displaying an early warning prompt, and displaying meteorology monitoring data, prediction data and early warning data The power grid micro meteorology calamity monitoring early warning system and the early warning method solve problems that meteorology data collection is dispersed, information sharing is insufficient and transmission is delayed, communication efficiency is low and prediction accuracy is low.

The invention discloses a stability analysis method for a doubly-fed fan grid-connected system, and belongs to the technical field of electrical engineering. According to the method, small signal impedance models of a rotor side converter port and a network side converter port of a double-fed fan are built under polar coordinates; and a small signal impedance model of a network port of a power grid side is built under the polar coordinates. According to the built small signal impedance models of the rotor side converter port and the network side converter port of the double-fed fan, and smallsignal impedance model of the network port, calculation is performed to obtain generalized impedance of the ports of the double-fed fan and generalized impedance of the network port of the power gridside; the two generalized impedances are divided to obtain a corresponding ratio; and the stability of the doubly-fed fan grid-connected system is judged according to a Nyquist criterion. The method can be used for analyzing the stability of the doubly-fed fan grid-connected system, and provides a theoretical foundation for understanding an oscillation mechanism caused after access of large-scalewind power to a power grid.

A track intelligent traveling-on-wall platform is an innovative product of organic integration of electromechanical devices and technologies and reflects the development tendency of the mechanical-electrical integration technology. The platform mainly comprises a stepping motor driving system, a gear transmission system, a track traveling system, a track adjustment system and a vacuum absorption system, and integrates multidisciplinary knowledge and technologies of mechanical design, electronic circuits, sensing detection, program control, feedback regulation, image processing, wireless transmission and the like. The platform can be stably adsorbed and can perform stable forwarding and free turning on rough or smooth vertical surfaces such as concrete wall surfaces, ceramic exterior walls, glass curtain walls and metallic wall surfaces, and has functions of automatic obstacle avoidance, tracking, real-time monitoring, image feedback and the like. The platform has the advantages of high adsorption force, good load performance, stable traveling, convenient control and the like, and can be popularized and applied to military reconnaissance, fire detection, oil tank measurement, road deicing, industrial production, antarctic science investigation and the like after hitting, defending and grabbing and lifting devices and the like are carried on the platform.

An H full-bridge conversion type micro-inverter grid connecting device belongs to the technical field of electrical engineering and resolves the problem of the decreasing efficiency of the whole photovoltaic plate group caused when a fault of any photovoltaic plate in prior solar photovoltaic system cascades occurs. The H full-bridge conversion type micro-inverter grid connecting device comprises a single-chip microcomputer controller, a complex programmable logic device (CPLD) controller, a metal-oxide-semiconductor field effect transistor (MOSFET) full-bridge circuit, a high-frequency transformer, a half-bridge rectification circuit, a silicon controlled rectifier (SCR) full-bridge circuit and a filter circuit. According to the H full-bridge conversion type micro-inverter grid connecting device, a MOSFET tube bridge is in full-bridge type, the transformer is a single-phase transformer with a center tap and a SCR bridge circuit, by means of the integral structure, the quantity of elements is reduced, the requirement on power switch tubes is reduced, a control circuit and a driving circuit are enabled to be simple, and accordingly, the purposes of reducing the quantity of full-control switch components, improving the system reliability and decreasing the system cost are achieved.

The invention provides an electrical equipment energy efficiency chaos analysis method based on massive measurement data, belonging to the technical field of electrical engineering, particularly relating to an electrical equipment energy efficiency chaos analysis method based on massive measurement data. The invention provides the electrical equipment energy efficiency chaos analysis method based on massive measurement data, an advanced measurement data analysis method and a test detection system are combined, the association relation between the use condition of user electrical equipment and user power consumption data is analyzed, thus the power consumption habit of a user and the load characteristic relations of different electrical equipment are obtained. The method comprises the steps of (1) using the membership degree for a fuzzy C-means clustering (FCM) to determine that the integrated load characteristic of the user belongs to which degree of clustering, dividing n industry users xi (i=1,2,,,n) into c fuzzy classes, and obtaining the clustering center of each class such that a class inner weighted error square sum function is minimized.

The invention relates to a comprehensive risk assessment method for power grid 500kV terminal substation construction and belongs to the technical field of electrical engineering. By enabling a 500kV substation to be connected to a power grid in a terminal station mode, a 500kV grid structure can be optimized, but lowering of the reliability level and increasing of the risk are caused simultaneously, and accordingly comprehensive assessment needs to be performed on the rick of the terminal station. To solve the problems, a comprehensive 500kV terminal station risk index system and the corresponding risk assessment method are provided, and the risk of the 500kV terminal station is quantized in four aspects including power grid safety, loss of power shortage and power supply, equipment damage and social influence. According to the method, risk factors in the four aspects including the power grid safety, the loss of power shortage and power supply, the equipment damage and the social influence are considered comprehensively, direct technical influence and indirect social influence of the power grid risk are covered comprehensively, and safety quantization of a planning scheme is accurate and comprehensive.

The invention provides a demonstration-free laser three-dimensional measurement method based on a reverse engineering technology and a device. A five-shaft linkage laser cutting machine usually needs one demonstration process before cutting, but original demonstration recording and returning process waste time and labor and is not easily and accurately controlled. An optical instrument is fixed on a laser cutting head, a motion control system of the cutting machine drives the optical instrument to move, and the optical instrument and a numerical control system of the five-shaft linkage laser cutting machine are utilized to form a borrowed-machine measuring system for finishing measurement of spatial point coordinates and obtaining point cloud data, then reverse engineering software is utilized to re-establish a CAD model of a workpiece, and further online planning on laser cutting postures and tracks is achieved according to the CAD model. The demonstration-free laser three-dimensional measurement method based on the reverse engineering technology and the device are used for online cutting of thin-wall and easily-deforming workpeices including large three-dimensional covering parts.

The invention relates to an ecological engineering technology for stopping riverway coastal pollutants from entering rivers and restoring vegetation communities. The ecological engineering technology consists of four basic unit systems, namely a land pollutant stopping and purification system, a slope protection system, a base construction system and a plant cultivation system; the units consist of physical materials and plants, wherein the pollutant stopping and purification system is built by materials such as plastic, woods, gravels, plants and the like; the slope protection system is built by materials such as woods or concrete, stone blocks, metal wires and the like; the base construction system is built by materials such as plastic, woods, soils, gravels, metal wires and the like; and the plant cultivation system consists of materials such as plants, plastic, soils and the like. The ecological engineering technology aims at land directional runoff pollution and side slope ecological structure construction of rural or urban suburban riverways, and has the advantages of fully and effectively collecting, detaining and purifying the land directional runoff pollution, particularly the runoff pollution of initial rain water, reducing the total amount of pollutants entering the riverway and realizing effective control on the riverway pollution; meanwhile, by the ecological engineering technology, a physical structure and a biologic structure of the riverway from the land direction to the water direction can be stabilized and perfected by building and restoring revetments and bases of the riverway, so a healthy, stable and developed riverway side slope biologic system is formed at last.

The invention discloses a harmonic and inter-harmonic separation detecting method and device suitable for a vessel electric power system, and belongs to the technical field of vessel electrical engineering. The device comprises a voltage transducer, a current sensor, a chassis wiring terminal, a signal conditioning circuit, a data acquisition card and an industrial control computer, wherein the wiring terminal, the data acquisition card and the signal conditioning circuit are mounted inside the industrial control computer; the industrial control computer acquires input data through a standard serial port, and LabVIEW software of a virtual instrument is used for restoring collected signals according to the transformation ratio, and original signals are recorded; the comprehensive detection on parameters such as frequency, amplitude value and phase of fundamental wave, harmonic and inter-harmonic can be completed; the detection result can be directly displayed on the liquid crystal display of the industrial control computer. According to the invention, a frequency tracking algorithm, a fundamental wave and harmonic extraction algorithm and an inter-harmonic detection algorithm are adopted to implement the fundamental wave, harmonic and inter-harmonic separation detection.

The invention relates to a method for optimizing electricity network output power in the technical field of electrical engineering, comprising the following steps: calling real-time data and net rack basic parameters of an SCADA database to form tidal data cross-section files; then calling load prediction system data and obtaining load growth mode of the next stage; converting the format of the tidal data cross-section files and the load prediction data to generate output mode optimized format data of the exertion mode of the generator; then carrying out optimization process on the exertion mode of the generator and outputting an optimum proposal; formulating an exertion plan of the generator according to the optimum proposal and implementing the generation exertion mode plan. In the invention, with the optimum proposal of the invention, the purpose of fast and effectively improving transmittable capacity of the power system and strengthening stability level of network voltage can be achieved for the power system transmission.

The invention relates to a wind power magnetic suspension yaw motor control method based on model predictive control and belongs to the technical field of electrical engineering. According to the method, the model predictive control technology is used, and the suspension and yaw rotation processes of a magnetic suspension yaw motor is smoothly controlled in real time. When a wind direction changesand yaw is needed, firstly a rotor current converter finds an optimal control law through a cost function to control the current of a rotor, thus the rotor is suspended upwards and is maintained at asuspension equilibrium point, secondly a stator converter finds an optimal control law through a cost function to control the current of a stator, thus the yaw motor rotates to a wind position according to a specified rotation speed, at the same time the rotor converter finds an optimal control law through a cost function to control the current of a rotor, thus the rotor is maintained at the suspension equilibrium point, the coordinated control of the stator and the rotor can be realized without decoupling, the fast tracking ability and stability of a system are ensured, at the same time, theinfluence of external disturbance on system operation can be effectively suppressed, and the system performance in an entire suspension yaw rotation process is optimal in real time.

The invention belongs to the technical field of electric engineering, and relates to a parallel storage battery pack voltage difference control technology. When storage battery packs run in a parallel mode, the charging voltage and the discharging voltage of each storage battery pack are controlled to enable the parallel storage battery packs to work in a health state; differential charging and discharging of the parallel battery packs can be achieved according to needs, and during the differential charging and discharging processes, the performance parameters and the state of the battery packs are detected; therefore, the performance of the parallel battery packs is improved, the service life of the parallel battery packs is prolonged, the flexibility of state detection of the parallel battery packs is improved, and the technical foundation is established for saving the operation cost of the parallel battery packs and improving economical benefits.

The invention discloses a moistureproof insulation material for electrical engineering. The material comprises an inner layer and an outer layer. The inner layer is prepared from the following raw materials in parts by weight: 10-16 parts of quartz sand, 16-22 parts of aluminum oxide, 16-22 parts of polyallylamine resin, 3-9 parts of dimethylformamide, 1-4 parts of butyl rubber and 3-9 parts of nano silicon dioxide. The outer layer is prepared from the following raw materials in parts by weight: 15-22 parts of epoxy resin, 10-17 parts of polyamide resin, 20-28 parts of glass fiber, 2-6 parts of ethylene propylene diene monomer rubber, 0.5-1.2 parts of 2-mercaptobenzimidazole, 1-4 parts of nano zinc oxide, 10-18 parts of silicon nitride, 2-9 parts of hydrogenated nitrile-butadiene rubber, 5-11 parts of aluminum nitride and 5-11 parts of polyethylene. The moistureproof insulation material is composed of the inner layer and outer layer; the outer layer achieves the moistureproof effect under the combined actions of the components; and the material has steady insulating property under the combined actions of the components of the inner layer.

The invention relates to the technical field of electrical engineering, and aims to provide a distributed energy storage SOC control and integration method in an AC microgrid island mode. The method comprises an outer loop control part and an inner loop control part. Through designing a distributed control method combining droop control, a plurality of energy storage output powers in a network canbe reasonably distributed. A central controller is not needed in the control process, the adverse effect caused by communication delay is eliminated while the cost of the communication cable is saved, the multiple energy storage units jointly support the bus voltage frequency, and the multi-energy-storage plug-and-play and real-time switching-out functions are achieved. By monitoring the output power of the energy storage direct current side, the real-time change of the SOC value of the energy storage charge state can be calculated, and the inversion frequency offset based on SOC variable droop control is introduced, so that the SOC among multiple energy storage can be balanced more quickly, and the overall working efficiency of energy storage can be effectively improved. By integrating the SOC state of energy storage under the control method, a network area voltage frequency change model and a voltage amplitude change model are built, and active power and reactive power output by other micro-sources in the network can be reasonably regulated and controlled through energy storage.

The invention provides an interactive and smart electric energy distribution and consumption monitoring device and method, and belongs to the technical field of electric engineering. An Anybus Profinet AB7013 webmaster is used for breaking through limit of the line distribution length and the communication bottleneck that one through network is hard to realize, the operating condition of a detected device is flexibly detected, start and stop of an operating device are controlled, an electrical load for alarming is omitted, and the electric energy waste condition due to abnormal operation of the electrical load is avoided; for the detected device, different device types and different regional devices can be involved, and the requirement for distributed smart data collection can be met; by means of a terminal user energy-saving monitoring, analysis and optimization technology, comprehensive energy conservation of multiple building groups and multiple districts can be achieved, and energy efficiency is improved; collected user requirement data are stored in an upper computer in a report mode, mangers can conveniently check the data regularly, energy conservation and consumption reduction in the electrical industry are guaranteed, and operation is safe and efficient.

The invention relates to the electrical engineering technology field and discloses a power grid dancing area prediction early warning method and a system thereof. The method and the system are used to increase a dancing forecast technology level and guarantee power grid safety operation. The method comprises the following steps of acquiring historical average pressure which is in a same period with prediction time in a prediction area; acquiring a forecast wind speed on two barometric surfaces adjacent to the historical average pressure in the prediction area, and through a correlation formula, determining a correction wind speed of the prediction area; according to the correction wind speed, determining a dancing wind speed index of the prediction area; according to the dancing wind speed index and through combining other early warning indexes, evaluating a power grid dancing early warning grade of the prediction area. In the invention, according to the historical average pressure of each prediction area and the forecast wind speed of the adjacent barometric surfaces, forecast wind speed correction is performed so that a wind speed of each prediction area can be accurately forecasted, an evaluation technology level of the power grid dancing early warning grade is increased and power grid safety operation can be ensured.

The invention discloses a control method and system for primary frequency modulation of a wind storage system, and belongs to the technical field of electrical engineering. The system comprises bottom-layer doubly-fed induction generator DFIG vector control, energy storage system ESS double closed-loop control, upper-layer power consistency control and state of charge (SoC) consistency control. Normal operation of the fan and the energy storage system is guaranteed through bottom-layer control, and power distribution of the fan and the energy storage system is adjusted through upper-layer control; on the basis of power consistency control, energy storage equipment can adjust energy storage frequency modulation power output in real time according to different capacities of the energy storage equipment; reference power of the DFIG network side converter is adjusted based on an SoC consistency protocol, and output of all energy storage devices is adjusted according to the SoC on the premise that the energy storage devices are charged and discharged at the same time. Thus, the wind storage output power can be effectively adjusted in real time to stabilize the frequency, and stable operation of the wind power plant is guaranteed.

The invention relates to an electric engineering technology, in particular to an incremental multitarget layering dynamic reactive power control method for a regional power grid. In the incremental multitarget layering dynamic reactive power control method for the regional power grid, acquisition, analysis, calculation and control of data are finished by using a reactive power control data interaction module, an increment control module which considers load fluctuation, a multitarget layering reactive power control strategy generation module and an emergency response strategy module. By usingthe powerful data acquisition and management capability of a regional power grid energy management system of a power system, the required data is directly read from the regional power grid energy management system; and by using the conventional system, hardware investment is saved; an incremental reactive power control scheme can effectively adapt to an actual transformation situation of network load; and a layering strategy generation mechanism can effectively simplify the calculation complexity.

The invention discloses a self-power direct current solid state circuit breaker based on a normal open type SiC device, belonging to the electrical equipment and electrical engineering technical field, and comprises a normal open type SiC power switch tube, a negative pressure turn-off circuit and an absorption circuit. The circuit breaker is characterized by employing the normal open type SiC power switch tube, and realizing overcurrent protection by detecting the drain-source voltage of the power switch tube; and utilizing the drain-source voltage under a fault state as the input power source of the negative pressure turn-off circuit, and realizing the self-power of the circuit breaker. Compared with a traditional solid state circuit breaker, the solid state circuit breaker of the invention does not need complex functional circuits such as a current detection device, a signal conditioning circuit and an auxiliary source circuit, thereby reducing the loss of the solid state circuit breaker, and increasing the response speed of the solid state circuit breaker.

The invention discloses a multi-inverter speed adjusting system of a low-voltage high-power multi-branch alternating current (AC) motor and pertains to the technical field of electrical engineering and relates to the electric transmission and the motor control of large machinery equipment. The system comprises a low-voltage high-power AC motor and at least two frequency converters, wherein, the low-voltage high-power multi-branch AC motor combines output ends of windings of a plurality of branches in parallel connection to form at least two three-phase output terminal groups each of which is connected with the frequency converters. Each three-phase output terminal group of the low-voltage high-power AC motor and the general low-voltage frequency converter connected with the motor form a separate circuit, thus avoiding the disadvantages of a driving system in which a high-voltage frequency converter supplies power to a high-voltage asynchronous motor. In addition, the general low-voltage frequency converter can adopt an SPWM control method with good output voltage waveforms and meanwhile, the price of the frequency converter is reduced and the reliability of the operation of the frequency converter is guaranteed.

The invention discloses an adaptive damping control method for a wind power grid-connected system based on multiple convex polytopic bodies, and belongs to the technical field of electrical engineering. According to the method, firstly, a multi-objective robust controller is designed for a single convex polytopic body, secondly, a classification decision tree is constructed and trained with a large amount of offline data, a regression decision tree is established by using online wide-area data, and a convex polytopic body area to which a current operation point belongs is identified, and finally, a robust controller corresponding to the convex polytopic body is adaptively switched in real time according to an online decision mechanism. According to the method, when wind power output has awide range of random fluctuations, the random drift behavior of a system operating point can be effectively tracked, thus the adaptive damping control is implemented, and system oscillation is effectively damped.

The invention discloses a power distribution network voltage control method based on multi-agent deep reinforcement learning, and relates to the technical field of electrical engineering and the technical field of computer science. The method comprises the steps of: (10) constructing a power distribution network multi-time-scale voltage control model for various voltage regulation devices including a capacitor bank, a photovoltaic inverter and an energy storage device; (20) distributing control variables to a plurality of agents, and converting a voltage control problem into a Markov decision process; (30) adopting a multi-agent deep reinforcement learning algorithm based on a multi-agent depth deterministic strategy gradient to solve the MDP process, and improving the algorithm according to the characteristics of a discrete voltage regulation device; and (40) training and executing the multiple agents to realize the multi-time-scale voltage control method. Compared with the prior art, a multi-time-scale control system is established from the perspective of optimizing the voltage control of the power distribution network, and an algorithm is proposed to process continuous and discrete voltage regulation devices at the same time so as to control the voltage.

The invention relates to a wind power magnetic suspension yaw system suspension control method based on a model mismatch compensator and belongs to the technical field of electric engineering. According to the method, by means of combination of model prediction control, PID and a model mismatch device, the problem of deviation caused by model mismatch due to linearized processing close to a magnetic suspension yaw system balance point is solved, and suspension at the balance point is controlled stably in real time; a model prediction control strategy is adopted according to a linearized model,a suspension air gap controller is designed, and outer ring suspension air gap control is achieved; output of the suspension air gap controller and output of the model mismatch device are added, a current measurement value of a suspension electromagnet winding is subtracted, a PID controller controls currents of the winding, and inner ring current tracking control is achieved; and suspension airgap deviation and winding current deviation are multiplied by respective adjusting parameters and then added to form the model mismatch device. The method is high in control precision, can effectivelysuppress the influence of external disturbance, and ensure that suspension close to the balance point is fast and stable.

The invention discloses a portable workbench for electrical engineering. The portable workbench comprises a cuboid box body of which the top is provided with an opening, a hydraulic lifting rod is arranged on the inner bottom surface of the box body, a cuboid table surface connected with the inner side wall of the box body in a sliding manner is arranged at the top of the hydraulic lifting rod, an illuminating lamp is arranged at the position, close to one of short edges, on the upper surface of the table surface through an universal pipe, a mounting clamp is arranged at the position, close to the other of short edges, on the upper surface of the table surface through a support, supporting seats are symmetrically arranged in the middle of the upper surface of the table surface, a hydraulic oil cylinder is arranged on each supporting seat, piston rod ends of the hydraulic oil cylinders are oppositely arranged, a baffle plate is arranged at the piston rod end of each hydraulic oil cylinder, and the inner bottom surface of the box body is further provided with a lifting motor for driving the hydraulic lifting rod to lift, a telescopic motor for driving the piston rod ends of the hydraulic oil cylinders to expand and a storage battery. The workbench is finer in structure, and can be portable.

The invention relates to a bionic curved surface structure and a construction method of an agricultural machine tool soil-touching part based on a reverse engineering technology, belonging to the technical field of agricultural machinery equipment. A surface is fit by five curve fitting equation, one end of that surface is cut by a section of arc as a cross section, and the other end of the surface is smoothly connected. Based on reverse engineering technology and bionics theory, point cloud was obtained from the back surface of Takydromusmongolicus and several back curves were extracted. Fiveparallel and equal width curves were selected to fit the curve trajectory into equation. Finally, a section of arc is taken as the cross-section and the five equations are smoothly connected to complete the construction of biomimetic surface structure. The bionic curved surface structure of the invention is used as a bionic curved surface plowshare soil-contacting part and has the advantages of strong insertion ability of the soil-contacting part into the soil, low working resistance and reduced damage degree of the plow body curved surface to the soil when the bionic curved surface plowsharesoil-contacting part is applied in practice.

The invention belongs to the technical field of genetic engineering technologies, and in particular relates to a quantitative catalyst preparation device for genetic engineering experiments. The invention aims at providing a quantitative catalyst preparation device, which is time-saving and labor-saving, good in catalytic effect of a prepared catalyst and good in safety, and is capable of quantitatively blending catalyst raw materials and water, for genetic engineering experiments. In order to achieve the aim, the invention provides the quantitative catalyst preparation device for the genetic engineering experiments, which comprises a bottom plate, a left side plate, a first sliding rail, a compression cylinder, a right side plate, a first sliding block, a rack, a connecting rod, a piston, a motor, a first rotating shaft, a driving wheel, a gear, and the like, wherein the left side plate, the first sliding rail, the compression cylinder and the right side plate are sequentially arranged on the top of the bottom plate from left to right. The quantitative catalyst preparation device can realize the processes of stirring and adding water during the preparation of the catalyst by using one electrical device, i.e., the motor, and simultaneously enables the catalyst to be prepared in a closed box.