62results about How to "Avoid magnification" patented technology

The invention relates to an intelligent integrated modular cabinet control method, system and device and a medium, and the method comprises the steps: monitoring the external environment parameters of a cabinet in real time through a sensor group in the cabinet, and carrying out the preprocessing of the external environment parameters through an edge computing device, and obtaining multi-dimensional environment parameters; integrating and analyzing the multi-dimensional environmental parameters and the internal operation data of the cabinet by using a multi-modal data fusion algorithm, and outputting a fusion analysis result; according to a fusion analysis result, generating a digital twinborn model of the current environment and the equipment state of the cabinet in the virtual environment, and performing rapid fusion simulation analysis on different adjustment schemes through simulation drift and a genetic algorithm to obtain an optimized adjustment scheme; and adjusting the resource configuration of each module in the cabinet and the operation state of the heat dissipation equipment based on the optimization adjustment scheme. The equipment cabinet has the effect of improving the operation efficiency of the equipment cabinet.

The invention discloses a capacitive voltage transformer for a gas insulated substation, which comprises a capacitive voltage divider and an electromagnetic unit, the capacitive voltage divider comprises a high-voltage capacitor C1 and a medium-voltage capacitor, the medium-voltage capacitor comprises a medium-voltage capacitor C21 and an externally connected medium-voltage capacitor C22, and the capacitance of the medium-voltage capacitor C22 is greater than that of the medium-voltage capacitor C21; the electromagnetic unit is connected with the capacitive voltage divider, an intermediate transformer and a compensation reactor are arranged in the electromagnetic unit, a full-shielding high-voltage shielding cover is arranged outside a high-voltage coil of the intermediate transformer, a damper and an overvoltage protector are arranged outside the electromagnetic unit, and the damper and the overvoltage protector are placed in an external junction box. The problem that in the prior art, an extra-high voltage transformer is low in lightning impulse overvoltage tolerance capacity is solved, the impulse overvoltage tolerance capacity is improved, and the breakdown risk is reduced.

The invention discloses a network security early warning method and system based on big data, and relates to the technical field of network security, and the main scheme is that multiple types of data including network traffic, user behaviors, system logs and hardware state data are collected, and then index calculation is carried out based on the data; a network attack risk index, a user data exception risk index, a system security risk index and a hardware fault risk index are calculated, a network security comprehensive risk index is further calculated comprehensively, finally, a network security early warning threshold value is preset, the comprehensive index is compared with the preset network security early warning threshold value, and whether an early warning mechanism is triggered or not is judged according to a comparison result. And generating corresponding early warning information.

The invention relates to the field of software information, and discloses a DevOps-based process management method, system and equipment. The method comprises the following steps: disassembling a research and development process of a software project to obtain each step in the research and development process, and packaging each step into an independently deployed task node; a to-be-processed software project is obtained, a research and development process and a stage process corresponding to the software project are determined according to the identification information, and the software project carries unique identification information; based on the research and development process and the stage process, screening the task nodes corresponding to the stage process, and constructing the screened task nodes into an assembly line; the assembly line is executed, and the research and development process is completed. According to the method, the software delivery quality is automatically monitored, the workload of research and development testers in the aspect of quality analysis is reduced, a flexible process establishment mechanism is introduced, different research and development processes are flexibly established according to management specifications of different projects, and the fine degree and flexibility of research and development process management are improved.

The invention discloses an equipment operation and maintenance management system based on a tobacco processing production line, and relates to the technical field of industrial automation. Equipment operation data are collected in real time by installing a sensor, the collected equipment operation data in different time periods are preprocessed, characteristic parameters in the equipment operation data are extracted, and the characteristic parameters are extracted; based on the extracted characteristic parameters, the change conditions of the characteristic parameters in different time periods are calculated, the overall operation state of the equipment is accurately evaluated through weighted average calculation and state division, and a differentiated maintenance strategy is formulated in combination with risk analysis, so that real-time monitoring and fault early warning of the equipment are realized, the equipment fault frequency is reduced, the maintenance plan is optimized, and the maintenance efficiency is improved. The maintenance cost is reduced, the production efficiency and product quality of a tobacco processing production line are improved, and efficient and stable operation of the production line is ensured.

The invention belongs to the technical field of robots, and discloses a decoupling control method and system for a two-degree-of-freedom vibration suppressor of a robot, and the method comprises the steps: analyzing the structural characteristics of a robot system, and designing a decoupling control strategy through a structural invariance principle; coupled vibration of force applied in the X direction in the Y direction and coupled vibration of force applied in the Y direction in the X direction are effectively eliminated. Compared with a traditional vibration control method, the multi-degree-of-freedom vibration suppression method has the advantages that the influence of a pose related mode and a coupling mode of the robot is fully considered, multi-degree-of-freedom vibration suppression can be efficiently realized in real time in a complex load and dynamic environment, and the adaptability and the control precision are relatively high. The technology has wide application prospects in the fields of robot precision machining, assembling, carrying and the like, and the stability, precision and working efficiency of a robot system can be remarkably improved.

The invention provides a copper-based adsorbent and application thereof in a glove box purification column, and belongs to the technical field of catalysts containing metals or metal oxides. The method comprises the following steps: adding active metal salt into a solvent, mixing and dissolving to obtain a mixed metal salt solution, mixing and dissolving a precipitant and the solvent to obtain a precipitant solution, co-precipitating the mixed metal salt solution and the precipitant solution, and separating, drying and calcining the obtained precipitate to obtain the supported copper-based adsorbent with the size phi of 1.8-6 mm. The copper-based adsorbent provided by the invention has good oxygen removal performance and regeneration capacity, can be continuously produced and is short in reaction time.

The present invention discloses a medium-high voltage fast switching switch device and method for power supply guarantee. The medium-high voltage fast switching switch device can realize the dual functions of fast switching of dual power supplies and short-circuit fault current limiting. When the voltage of the main power supply circuit temporarily drops or is interrupted for a short time, the device of the present invention can realize the fast switching of the backup power supply circuit. When a short-circuit fault occurs on the load side, the device of the present invention can quickly realize the fault current limiting function, thereby avoiding the expansion of the fault, which is of great significance to the safe and reliable operation of the power system.

The invention relates to the technical field of high-pressure inflation bottle storage, and discloses a high-pressure inflation bottle packaging storage device which comprises a storage frame, the storage frame comprises a bearing frame, a connecting frame is installed on the bearing frame, two sets of first valves are installed on the connecting frame, and a first inflation pipe is installed between the two sets of first valves; a plurality of gas circulation pipes are further mounted on the first gas filling pipe; a plurality of high-pressure inflation bottle bodies, wherein each high-pressure inflation bottle body is provided with a second valve; and the first unit comprises a second inflation pipe installed on the supporting frame, and an assembling assembly is arranged between the second inflation pipe and the second valve. Through the arrangement of the first unit, the gas transmission link can be monitored, the potential gas leakage condition can be found in time and early warned, the expansion of a gas leakage accident is effectively prevented, meanwhile, the gas circulation pipe and the second valve can be conveniently and rapidly assembled, and the leaked high-pressure gas filling bottle body or the high-pressure gas filling bottle body needing to be maintained can be conveniently replaced.

The invention discloses a face gear on-machine measurement comprehensive error compensation method based on sequential decoupling. Specifically, a sequential decoupling compensation strategy is provided for solving the problem that the measurement precision is limited due to mutual coupling of a measuring head pre-stroke error and a workpiece installation coordinate system error in the prior art. The method comprises the following steps: firstly, establishing a measuring head pre-stroke error model through standard ball calibration, and performing anisotropic compensation on a tooth surface measuring point by utilizing Delou inner triangulation and a weighted interpolation method; secondly, based on the compensated data, the outer cylindrical surface and the tooth top plane of the face gear are accurately fitted through an iterative optimization algorithm, an accurate measurement coordinate system is established, and the initial phase of the C axis is optimized; and finally, reconstructing an actual tooth surface by adopting a two-stage NURBS curved surface fitting method, and calculating a normal deviation. According to the method, an error propagation chain is effectively cut off through a strict execution sequence, the overall precision and reliability of on-machine measurement are remarkably improved, and a key technical support is provided for face gear closed-loop manufacturing.

The invention relates to a photovoltaic system with an anti-hot-spot effect, which comprises photovoltaic panels arranged in rows and a cleaning device perpendicular to the arrangement direction of the photovoltaic panels and parallel to the photovoltaic panels, and the cleaning device moves along the arrangement direction of the photovoltaic panels through a first moving device; the photovoltaic panels are provided with temperature sensors, the temperature sensors are connected with the control switchboard, if the temperature detected by any temperature sensor is higher than a temperature threshold value, the control switchboard controls the first moving device to move towards the photovoltaic panels with the temperature exceeding the standard, and the cleaning device cleans the surfaces of the passing photovoltaic panels in the moving process. According to the photovoltaic system with the hot spot prevention effect, the temperature condition of each photovoltaic panel is monitored in real time, the photovoltaic panel with the temperature exceeding the standard is found in time and automatically cleaned, meanwhile, the switchboard is controlled to send an early warning signal to the switchboard, the abnormal temperature of the photovoltaic panel is controlled in time, the spontaneous combustion time of the photovoltaic panel is delayed, and the self-ignition efficiency of the photovoltaic panel is improved. And most dirt can be cleaned in time, so that the labor cost is reduced.

This invention relates to the field of pole production and manufacturing execution management, and discloses an intelligent pole production execution management system based on the Internet of Things (IoT). The system includes a data acquisition unit, an edge processing unit, a cloud management platform, an intelligent analysis unit, and a human-machine interaction unit. The system collects data on raw material ratios, mold status, curing temperature, humidity, and other detection data through sensors. The edge processing unit identifies anomalies in real time and performs rapid adjustments. The cloud management platform generates a digital twin of the pole and combines it with an algorithm model to adaptively adjust curing temperature, minimize energy consumption, predict lifespan, predict production capacity, and assess mold lifespan. The human-machine interaction unit presents process information to operators through an augmented reality terminal and supports two-way feedback. This system enables real-time monitoring and closed-loop optimization of the entire pole production process, reducing energy consumption, improving consistency, extending service life, and significantly enhancing the intelligence and reliability of the production process.

The present invention relates to the technical field of jujube tree planting monitoring, and discloses a jujube tree planting status monitoring and early warning system and method. The system comprises: a detection end and an evaluation end, wherein the detection end is provided with a plurality of detection units, and the detection end is used to obtain the plant water potential inside the jujube tree in a preset planting area, the canopy chlorophyll content of the jujube tree, and the growth height of the jujube tree; the evaluation end is electrically connected to the detection end, and the evaluation end is used to evaluate the health value of the jujube tree according to the plant water potential inside the jujube tree, the canopy chlorophyll content of the jujube tree, and the growth height of the jujube tree, and send corresponding early warning information according to the health value. The present invention realizes intelligent management of the growth status of the jujube tree by integrating monitoring, evaluation and early warning functions. Not only the scientificity and accuracy of jujube tree planting are improved, but also the planting efficiency and fruit quality are significantly improved. Thus, the growers can better grasp the growth dynamics of the jujube tree, take scientific management measures in time, and ensure the health and efficient production of the jujube tree.

The electrochemical reaction device comprises a plurality of electrochemical reaction units which are sequentially connected in series; the electrochemical reaction unit comprises a vertical cylindrical first reaction part and a U-shaped cylindrical second reaction part; the upper end and the lower end of each electrochemical reaction unit are provided with connecting pieces connected with the screen plate, and the connecting pieces are used for fixing the outer electrode and the inner electrode and are hermetically connected with the first reaction part and the second reaction part; an automatic exhaust valve is arranged above the second reaction part connected in each electrochemical reaction unit; gas in the electrolysis system is discharged out of the reaction system; attachments on the surface of the electrode are easy to clean and convenient to disassemble; installation is simple and fast; catalytic layers for electro-catalytic reaction are prepared on the inner wall of the outer electrode and the outer wall of the inner electrode of each electrochemical reaction unit; and catalyst layer materials on the surfaces of the positive and negative electrodes can be timely repaired.

The invention discloses a roller peeling real-time monitoring and automatic shutdown control method. The method comprises the steps that real-time rolling force data are obtained; rolling force prediction data are obtained based on the real-time rolling force data and a trained ARIMA rolling force prediction model; obtaining a first rolling force absolute deviation according to the real-time rolling force data and the rolling force prediction data; and carrying out real-time monitoring and automatic shutdown control on the peeling state of the roller based on the first rolling force absolute deviation and a rolling force absolute deviation threshold value. By means of the method, further expansion of production accidents such as roller breakage caused by the fact that a rolling mill continues to operate due to the fact that roller stripping is not found in time on site can be prevented, and the consumption cost of the on-site roller is reduced; and meanwhile, the accident shutdown time caused by roller stripping on site can be greatly shortened, quick response can be achieved after the roller is abnormally stripped, automatic shutdown is achieved, and the accident shutdown time caused by roller stripping and damage to rolling mill equipment are shortened within the maximum range.

The invention relates to the field of energy storage power station control, and particularly discloses a layered distributed emergency stop control system of an energy storage power station, which comprises a local emergency stop control unit used for executing shutdown control of at least part of equipment in the energy storage power station; the regional emergency stop control unit is associated with all local emergency stop control units in a regional coverage range and is used for executing shutdown control of equipment in the regional coverage range in the energy storage power station; and the station end scram control unit is associated with the all-region scram control unit and is used for executing all-region shutdown control of the energy storage power station through the station end controller when the station end scram button is triggered. According to the technical scheme provided by the invention, through the arrangement of the regionalized distributed layered emergency stop control units, the reliability risk that the existing emergency stop control system is easily influenced by the single-point fault of the central controller is avoided, and the omnibearing precise shutdown control and local isolation protection of the energy storage power station are realized.

The utility model relates to a geotechnical engineering technical field provides a kind of hydraulic vibration-stopping adapter and spray anchor elbow car, wherein, hydraulic vibration-stopping adapter includes shell, multiple pin shafts, connecting plate and multiple hydraulic vibration-stopping devices, multiple pin shafts are side by side arranged in the one end of shell, the pin shaft has the both ends of along the direction of its own axis from the opposite sides of shell the end of passing out, the end of passing out is used to be connected with hydraulic arm;Connecting plate is movably arranged in shell, and connecting plate is used to be connected with spray anchor manipulator;Multiple hydraulic vibration-stopping devices are set one by one with multiple pin shafts, one end of hydraulic vibration-stopping device is connected with connecting plate, the other end of hydraulic vibration-stopping device is sleeved on pin shaft through shaft sleeve, wear-resistant nylon sleeve is arranged between shaft sleeve and pin shaft.This application significantly reduces harmful vibration, greatly improves the precision of spray anchor concrete.

This application relates to a joint estimation method for wireless communication delay and frequency offset based on hill-climbing fine search. The method includes: setting a time offset search range, a frequency offset search range, a coarse search step size, and a fine search step size based on prior information; generating a two-dimensional grid point set within the search range according to the coarse search step size; calculating the cost value of each grid point based on a cost function; taking the time offset and frequency offset corresponding to the maximum value as the coarse estimate; using the coarse estimate as the initial point, performing fine search iterations using hill-climbing; calculating the cost value of multiple candidate points in the neighborhood in each iteration, comparing and determining the update direction, and updating the current time offset and / or frequency offset; repeating the iteration until a preset exit condition is met, and outputting the final estimate. This application effectively solves the parameter coupling problem of traditional step-by-step estimation in NTN scenarios, while balancing search range and computational complexity, facilitating engineering implementation, and being applicable to various NTN systems and terminal forms.

This utility model discloses a busbar trunking cutting and shearing device, applied in the field of power distribution equipment processing technology. It includes a trunking plate B, with side plates B slidably connected to both sides of the inner wall of the trunking plate B. A connecting rod B is bolted to opposite sides of the two side plates B. Sliding sleeves are bolted to the top and bottom of the connecting rod B. This utility model uses concentric clamping to evenly distribute cutting stress, avoiding twisting or local deformation of the busbar trunking due to unilateral force, maintaining the geometric accuracy of the conductor arrangement, effectively offsetting vibrations generated by the contact between the tool and the material during cutting, reducing the risk of chipped edges, and avoiding tilted or stepped cross-sections caused by workpiece offset. Timely separation avoids slippage or tipping of the cut piece due to gravity and mechanical stress, reducing secondary injuries such as pinching and collisions. The separation action reduces continuous friction between the cutting surface and the tool, preventing the expansion of burrs and extending the tool's service life.

The utility model relates to the technical field of Internet of Things, and discloses a building management and control system and an intelligent building, and the system comprises a control module, a plurality of control terminals, a sensor module, and a building management subsystem. The sensor module is used for gathering sensor data of the building management subsystem and transmitting the sensor data to the control module; the control terminal is used for monitoring the operation state of the building management subsystem and sending an equipment control instruction for controlling the building management subsystem to the control module; and the control module is used for receiving the sensor data of the building management subsystem acquired by the sensor module, and controlling the operation state of the building management subsystem based on the sensor data and the equipment control command sent by the control terminal. According to the utility model, the on-site or mobile terminal remote regulation and management function of the equipment in the building on the mobile terminal is realized, and the problem that the on-site or mobile terminal remote regulation and management function on the mobile terminal does not exist in the prior art is solved.

The utility model discloses an RTO incinerator system which relates to the technical field of waste gas treatment and comprises an incinerator assembly and first protection assemblies, the first protection assemblies are arranged on the side edge of the upper end of the incinerator assembly in an annular array mode, and second protection assemblies are arranged on the side edge of the lower end of the incinerator assembly in an annular array mode. And fire-fighting assemblies are mounted on the sides, away from the incinerator assembly, of the second protection assembly and the first protection assembly. According to the RTO incinerator system, the first protection assembly and the second protection assembly are annularly arrayed at the upper end and the lower end of the outer side of the incinerator assembly, effective structural buffering protection can be effectively provided for the whole incinerator assembly, and structural damage caused by external acting force to the whole incinerator assembly is relieved to the maximum extent; in the operation process of the incinerator assembly, if a disaster occurs, fire protection can be carried out on the incinerator assembly in the first time, the disaster is prevented from expanding, and external workers can take fire protection measures conveniently.

This invention discloses a culture medium for the biosynthesis of indigoidine and its application, belonging to the field of microbial fermentation and synthetic biology technology. Addressing the problems of low yield, insufficient precursor supply, byproduct accumulation, and poor scale-up stability in existing culture media for indigoidine fermentation, this invention provides a core culture medium system. This medium, per 1L, includes: 10-50g carbon source, 5-20g nitrogen source, 10-30g L-glutamine, and 0.1-20g inorganic salts, with optional addition of 0.1-20mL trace element salt solution and / or vitamin components. The pH is 6.0-7.5. The carbon source is selected from glucose, glycerol, sucrose, dextrin, or combinations thereof; the nitrogen source is selected from ammonium sulfate, yeast extract, peptone, or combinations thereof. This culture medium can significantly increase the yield of indigoidine synthesized by recombinant *E. coli* and effectively inhibit acetic acid accumulation. In a 5L fermenter, compared with LB medium, this medium can increase the indigoidine yield by at least 80% while reducing the acetic acid concentration in the fermentation broth by more than 60%, showing good prospects for industrial application.

The utility model discloses a GIS partial discharge detection device based on a coupling capacitance method. The GIS partial discharge detection device comprises a solar blind photoelectric detector, a single electron detector, a photomultiplier sensor, a signal conversion module, a capacitive sensor, a data acquisition module, a database and a single-chip microcomputer module. The solar blind photoelectric detector, the single electron detector and the photomultiplier sensor are mounted on the inner wall of the GIS; the signal conversion module, the capacitive sensor and the data acquisition module are mounted on the outer wall of the GIS; the signal conversion module is electrically connected with the solar blind photoelectric detector and the photomultiplier sensor respectively; the data acquisition module is electrically connected with the signal conversion module and the capacitive sensor respectively; the single-chip microcomputer module and the database are electrically connected with the data acquisition module in sequence. According to the utility model, data can be collected, sensitivity can be improved, interference resistance can be realized, and problems of poor anti-interference capability and easy electromagnetic wave interference existing in a coupling capacitance method can be solved.

The invention discloses a double-stage document image general restoration method and system for a large model, and the method employs a double-stage restoration model for image restoration, and comprises a space correction stage and a pixel correction stage. In the spatial correction stage, the degraded image is processed through a double-branch structure of a layout branch and a text line branch; wherein the layout branch predicts a sparse two-dimensional mapping field and a three-dimensional coordinate grid to recover a global geometric structure, and the text line branch generates a local modulation signal based on text region features extracted by a pre-training text segmentation model; fusing global and local information, generating a dense two-dimensional mapping field, and outputting a space correction image by using reverse sampling operation; in a pixel correction stage, a spatial correction image and a gradient map thereof are used as conditions to be input into a denoising diffusion implicit model architecture to gradually recover pixel values. According to the method, general repair of various degradation problems is completed through double-stage repair, so that the content reading capability of various large models on document images is improved.

The draught fan damping device comprises a damping unit, a first machine foot plate and a second machine foot plate, wherein the first machine foot plate and the second machine foot plate are parallel to each other. Each vibration reduction unit comprises at least three layers of coaxial vibration reduction cylinders and a plurality of connecting rings, the end faces of every two adjacent layers of vibration reduction cylinders are connected through one connecting ring, and every two adjacent connecting rings are connected with the two end faces of the same vibration reduction cylinder correspondingly. The first machine foot plate is connected with the vibration reduction cylinder on the innermost layer, is positioned outside the vibration reduction cylinder on the innermost layer and is used for mounting a fan; the second machine foot plate is connected with the vibration reduction cylinder on the outermost layer, located outside the vibration reduction cylinder on the outermost layer and used for being connected with the installation platform. The vibration of the fan is transmitted to the vibration reduction cylinder on the innermost layer from the first machine foot plate, sequentially transmitted to the vibration reduction cylinder on the outermost layer from inside to outside and then transmitted to the second machine foot plate, under the vibration reduction device with the same height, the transmission path of the vibration can be enlarged by more than three times, the good effect on energy consumption and attenuation of low-frequency vibration is achieved, and the service life of the fan is prolonged. The longitudinal space can be fully utilized, and the applicability of the device is improved.

The invention relates to the technical field of artificial intelligence and deep learning, and discloses a biological heterogeneous data safety monitoring method and system based on deep learning, and the method comprises the steps: obtaining three types of heterogeneous data: genome, electronic health record and medical image; respectively preprocessing to generate standardized features; the multi-modal alignment encoder is fused into a unified embedded representation; calculating a disturbance sensitivity score by synchronously utilizing a disturbance-resisting sensing unit; triggering a dynamic credibility verification module based on the score, and executing gradient consistency check and feature reconstruction residual analysis; and if detection is abnormal, inference is terminated and an alarm is given, otherwise, a disease prediction backbone network output result is input. The system comprises corresponding functional units, is integrated on a private cloud platform, and supports encrypted transmission and trusted execution environments. According to the invention, cross-modal adversarial attacks can be identified, and safe and reliable operation of medical AI is guaranteed.

The invention relates to a centralized management and control system for multiple machine tools. The centralized management and control system comprises a plurality of control parts and a plurality of monitoring parts which are in one-to-one correspondence with a plurality of machine tools; the control part comprises a first control unit and a second control unit, and the first control unit is connected into a control system of the machine tool and used for controlling the machine tool on site; the second control unit is arranged in a control room, is in butt joint with the first control unit through a workshop equipment network and is used for remotely controlling a machine tool; the monitoring part comprises a measuring unit and a monitoring unit, the measuring unit is integrated on the machine tool, and the monitoring unit is arranged in the control chamber and is in butt joint with the measuring unit. According to the multi-machine-tool centralized management and control system, original programs of the machine tools do not need to be changed, centralized remote monitoring and control over the multiple machine tools can be achieved in a simple access mode, the problem expansion caused by unexpected field care is avoided, one person controls indoor guarding, the overall number of people is reduced, and the comprehensive efficiency of the personnel is improved.

The invention relates to the technical field of diode packaging, in particular to a wafer level packaging-based diode preparation process, which comprises the following steps of: performing primary formation quality detection on the basis of forming initial salient points on a target wafer, determining whether a reflow soldering mode is started or not according to a primary deposition detection result, and performing secondary formation quality detection on the target wafer on the basis of starting the reflow soldering mode. Determining actual reflux parameters according to a primary deposition detection result; heating the target wafer according to the actual reflow parameter to form a target bump; in the backflow heating process, monitoring the target wafer in real time, and determining time nodes of all stages of the backflow heating process according to the backflow monitoring parameter set; and packaging and cutting the target wafer on the basis of the completion of the reflux heating process, performing an electrical test on each obtained diode wafer particle in the cutting process, marking the diode wafer particles which are unqualified in the electrical test to obtain an electrical marking result, and determining an actual abnormal reason according to the electrical marking result.

The utility model provides a box-type fixed metal closed switch cabinet, which belongs to the technical field of switch cabinets and comprises a box body and a box door rotatably connected to one side of the box body. The fireproof structure comprises a top replacement assembly fixed in the box body, an aerosol fire extinguisher installed at the bottom end of the replacement assembly and an infrared sensor installed in the box body. According to the flame-retardant and fire-extinguishing device, flame is monitored through the infrared sensor, data are fed back to the aerosol fire extinguisher, aerosol in the aerosol fire extinguisher is discharged, flame-retardant and fire-extinguishing are conducted on the flame in the box body, loss is reduced, the aerosol fire extinguisher can be replaced and overhauled by disassembling the cover plate, and therefore the flame-retardant and fire-extinguishing functions of the flame-retardant and fire-extinguishing device are achieved. When a fire disaster occurs, the device can quickly control the spreading of the fire behavior and prevent the fire disaster from being expanded, thereby guaranteeing the safety of personnel and equipment, and simultaneously reducing the damage of the fire disaster to electrical elements and cables in the switch cabinet to the greatest extent.

The utility model relates to the technical field of chemical engineering, in particular to a fixed bed liquid phase hydrogenation device which comprises a workbench, the upper end of the workbench is fixedly connected with a reaction device, a hydrogenation assembly is arranged in the reaction device, and the hydrogenation assembly penetrates out of the right side wall surface of the reaction device. When the reactor is used, hydrogen introduced into the gas inlet pipeline is fully homogenized into the reaction inner cavity through the gas holes, so that under the condition that the activity of a catalyst is ensured, the catalyst is fully reacted with a reaction solvent, the mass transfer effect is improved, the amplification effect in the production process is avoided, and the reaction efficiency is ensured.