153results about How to "Address risk" patented technology

The invention discloses an electrical switch cabinet detection method based on the Internet of Things, and particularly relates to the technical field of electrical switch cabinets. A sensor is installed inside or outside a switch cabinet, temperature, humidity, current, voltage and gas concentration are collected, data are transmitted to an edge computing node for preprocessing by using a wireless communication technology, the preprocessed data are uploaded to a cloud platform, storage and trend analysis are performed at a cloud end, and the data are analyzed based on big data analysis and an artificial intelligence algorithm. According to the invention, the system can predict potential faults, a user can check the operation state and the prediction result of the equipment in real time through the cloud platform, and carries out the emergency shutdown or equipment scheduling operation remotely according to the early warning information, thereby effectively solving a reliability problem caused by communication interruption or data delay in an existing Internet of Things system, and improving the safety and intelligent level of the monitoring of the switch cabinet.

The invention provides a parallel water pump intelligent algorithm optimization combination and control method, which comprises the following steps of: configuring a sensor and a calculation module on an edge node of each water pump, acquiring and preprocessing operation data of each water pump in real time, and generating a unified real-time feature vector and a time sequence feature; dynamically calculating the service life state of the water pump according to the real-time feature vector, and quantifying the residual service life; designing a dynamic start-stop scheme based on a fuzzy logic algorithm according to the service life state, and balancing load requirements and water pump service life distribution; and based on federal learning, the residual life of the water pump is optimized in a global perspective, and an operation strategy based on a start-stop scheme is dynamically optimized and adjusted. A complete solution is formed, and a brand new technical path is provided for efficient and reliable operation of the parallel water pumps.

The invention relates to the field of electric power automation, and discloses an intelligent switch cabinet control system and method, and the system comprises sensing equipment which is used for collecting the voltage, current and temperature multi-dimensional operation parameters of a power grid; the edge calculation module is in communication connection with the sensing equipment and is configured to generate a switch control strategy through dynamic modeling and an optimization algorithm based on the collected operation parameters; a control execution module which is in communication connection with the edge calculation module and is used for receiving the switch control strategy and adjusting the operation state of the switch cabinet; and the cloud platform is in communication connection with the edge computing module and is used for storing operation parameters, fault response records and an optimization control model and providing global data analysis and optimization services. By adopting the technical scheme of combining the sensing equipment and the edge calculation module, real-time acquisition and dynamic modeling of multi-dimensional parameters of the power grid are realized, and the technical effect of quickly capturing the running state change of the power grid is achieved.

The invention belongs to the technical field of electricity-coal safe transaction, and discloses an electricity-coal safe transaction method and system based on a block chain. The method comprises the following steps: carrying out key generation and identity authentication based on a trusted mechanism; uploading encrypted real-time electricity and coal supply data based on an electricity and coal supplier terminal; based on the cloud data center, obtaining decrypted real-time electricity and coal supply data; legality verification is carried out, and distributed storage is carried out; the encrypted real-time electricity and coal demand information is uploaded based on a power plant terminal; based on the cloud data center, obtaining decrypted real-time electricity and coal demand information; retrieving real-time electricity and coal supply data after target decryption; and carrying out electricity-coal safe transaction, and returning a real-time transaction success signal to the corresponding power plant terminal and the electricity-coal supplier terminal. According to the invention, the problems of insufficient security and transparency, low transaction efficiency and high data management cost in the prior art are solved.

The invention relates to the technical field of water conservancy projects, in particular to a water conservancy project digital management method based on a BIM model. The method comprises the following steps: acquiring real-time monitoring data; carrying out high-precision topographic data acquisition on a water conservancy project area, and carrying out data preprocessing to obtain preprocessed data; according to the preprocessed data, hydrological information integration modeling is carried out by utilizing a BIM platform, and a hydrological information integration model is obtained; performing multi-dimensional terrain dynamic updating on the hydrological information integration model by using the real-time monitoring data to obtain digital terrain data; performing flood simulation calculation based on the digital topographic data to obtain a flood simulation calculation result; and performing flood scene simulation according to the flood simulation calculation result to obtain flood simulation data. Through real-time monitoring, accurate prediction and timely early warning of the risk of the water conservancy project, a more effective technical means is provided for flood control and disaster reduction and safety management of the water conservancy project.

The invention relates to the technical field of fire fighting management, and relates to a fire fighting access occupancy event detection and acousto-optic warning processing device and system. Technical problems are as follows: at present, professional and effective identification means for fire fighting access occupancy events are lacked, intelligent automatic detection modes for occupancy objects and vehicles on fire fighting accesses are lacked, and hierarchical linkage with a plurality of responsibility subjects and emergency response integration are not tight enough; according to the technical scheme, the fire fighting access occupancy event detection and acousto-optic warning processing device and system comprise a video access acquisition module, an event detection module and an intelligent linkage processing module; the fire fighting access occupancy event is intelligently identified by adopting an intelligent visual method, and the event is handled through a grading and classifying strategy in combination with the responsibility of a multi-responsibility subject and a rapid handling mechanism. The problems that fire fighting access occupancy events are passively responded and hidden danger risks are not found in advance are solved, potential hidden danger risks are pre-warned through intelligent recognition, a risk prevention system is perfected, and the prevention capacity is improved.

The invention belongs to the technical field of scramjet engine control, and particularly relates to a semi-physical simulation test platform of a scramjet engine control system, which comprises a fuel supply and control system, an engine simulator system, a flight control simulation system, a sensor simulation system, an upper computer management system and the like. The test platform can provide test equipment support for development (including control law research, control parameter optimization, performance prediction, fault diagnosis and the like) of a scramjet engine control system, and comprehensively examine system matching performance and control performance of key components such as a controller, a fuel pump, a fuel valve and the like. And stable and reliable operation of the scramjet engine control system is guaranteed.

The invention discloses a cage cable-based FAST cable-driven pulley high-altitude inspection and maintenance device, and the device is characterized in that a FAST telescope comprises a plurality of process systems, such as an active reflection surface system and a feed source supporting system; in the feed source supporting system, six steel cables are led out from six supporting towers to pull and control a feed source cabin to move on a focal plane, a plurality of pulleys used for hanging cables and optical cables are arranged on each steel cable in cooperation with astronomical observation, and the inspection and maintenance device comprises a cableway, a cable crane, a cableway hanging basket and a lifting pulley platform. The cableway is erected between the cable crane and the lifting pulley platform, and transverse movement of the cableway is achieved through walking of the cable crane. The cableway hanging basket is used for moving between the upper anchoring end and the lower anchoring end along the cableway to be close to the position of the cable driving tackle needing to be inspected and maintained, and then the cableway hanging basket is controlled by carrying maintenance personnel to vertically ascend and descend or arrives at the position of the tackle needing to be inspected and maintained along the cableway ascending / descending mechanism for inspection and maintenance.

The invention provides a network packet processing method and device, electronic equipment and a storage medium, and the method comprises the steps: receiving packet network packets of different QoS (Quality of Service) levels, and sending the packet network packets of a real-time service to a corresponding target network card queue; on the basis of a pre-established linear mapping relationship, locking a universal processor CPU core corresponding to the target network card queue and resources of an operating system thread to process the packet network packet of the real-time service; wherein the linear mapping relationship is a linear mapping relationship among a universal CPU core, an operating system thread and a network card multi-queue, so that the Qos resource conflict problem of real-time services and non-real-time services is solved from the bottommost layer of hardware resources such as a network card and a CPU, and the resource entanglement and resource competition risk of the real-time services and the non-real-time services is solved from the framework level; and in combination with software and hardware, high throughput, low time delay and low jitter of real-time services are better supported.

The present invention relates to a key storage method that is resistant to loss and can be intervened by the cloud, which is characterized by comprising the following steps: Step 1: The master client generates its own public and private key pair.<publickey,privatekey> ; Step 2, the main client splits the private key privatekey into two parts, Head and Body, and uploads the Head part to the cloud for storage; the cloud then establishes a database of the matching relationship between the main client's public key and the Head part of the private key; Step 3, the main client splits the body part of the private key into N parts, and then distributes the N shadows to the N auxiliary clients, and stipulates that the Body can only be restored if t auxiliary clients contribute their own saved shadows. The present invention solves the problem of cloud storage keys, excessive cloud responsibilities and risks, and also solves the problem of easy loss of client storage keys.

The invention provides a liquid ammonia injection system and a diesel engine post-treatment system. The liquid ammonia injection system comprises a liquid ammonia tank for storing liquid ammonia, an ammonia gas nozzle and an ammonia gas injection pipe for connecting the liquid ammonia tank and the ammonia gas nozzle, the liquid ammonia tank comprises a tank body, a pressure reducing and stabilizing device and an electronic control unit, the tank body and the pressure reducing and stabilizing device are both electrically connected with the electronic control unit, the tank body is connected with the pressure reducing and stabilizing device through a pipeline, the ammonia gas nozzle is connected with the pressure reducing and stabilizing device through a pipeline, and the electronic control unit is electrically connected with an engine controller; the tank body is provided with a first liquid cooling pipeline which is used for increasing the temperature of liquid ammonia and is communicated with an engine cooling system. The SCR system nitrogen oxide reduction technology has the low-temperature-section tail gas treatment capacity, the NOx conversion efficiency of the SCR system can be effectively improved, the risk that urea crystals are blocked and PM exceeds the standard is solved, a post-treatment mixer is simplified, the exhaust back pressure is reduced, and oil consumption of the whole vehicle is reduced.

The utility model discloses equipment for automatically embedding contact pins, and belongs to the field of automation equipment. The automatic inserting pin embedding equipment comprises a platform rack, a discharging module, a first mechanical arm, a material taking module, a positioning module, a second mechanical arm and an injection molding machine, the discharging module and the first mechanical arm are installed on the platform rack, the injection molding machine is arranged on one side of the platform rack, the second mechanical arm is installed on the injection molding machine, and the material taking module is detachably connected with the first mechanical arm. And the positioning module is detachably connected with the second manipulator. According to the utility model, the corresponding material taking module and the positioning module can be replaced when product parameters change, so that one device can correspond to multiple types of products, the production cost and the working risk are greatly reduced, and the problems that the cost is high and the working efficiency is high when the whole device is replaced when the product parameters change in the prior art are solved. And the manual pin insertion cost and risk are high.

The utility model relates to the technical field of support structures, and provides a double-row support pile foundation pit support for collapsible geology, which comprises a drain pipe and a flushing mechanism, a T-shaped chute is arranged on one side of a support plate, the drain pipe is arranged in the support plate, and one side of the drain pipe is connected with a water pump. Water collection can be achieved through the hollow structures of the drainage pipes, water is allowed to flow between a soil body and the supporting plate through the multiple drainage pipes, accumulation of pore water pressure is reduced, the water gathered in the drainage pipes is discharged through the water pump, the pore water pressure is effectively reduced, and the problem that collapsible geology is high in pore water pressure and prone to water leakage is solved. The problems that the foundation pit collapses and slides due to seepage and deformation of soil around a supporting plate caused by the fact that the foundation pit collapses and slides are solved, a telescopic rod is moved, a water spraying opening is located above a T-shaped sliding groove, a lifting rod is moved up and down, the T-shaped sliding groove is flushed, and the problem that an adjusting mechanism cannot be installed due to the fact that soil is likely to accumulate in the T-shaped groove is solved.

The invention relates to the technical field of pet medical information, and discloses a pet cloud medical record management method and system, and the method comprises the steps: collecting pet health data through a user terminal, and the pet health data comprises video and text description; uploading the video to a video processing module, automatically editing the video through the video processing module, and extracting key segments; the text description and the key segments are integrated, and a structured pet electronic medical record is generated through a medical record generation module; storing the pet electronic medical record to a cloud storage server, and storing the hash value of the pet electronic medical record to a block chain network; and according to a user instruction, safe sharing and multi-terminal synchronization of the pet electronic medical record are realized through the safety control module. According to the method, the problem that the pet cannot know the pain point of the illness state by himself / herself is solved, the behavior performance of the pet can be effectively recorded and traced, the burden of a pet owner for sorting data is relieved, and meanwhile, a more intuitive and complete diagnosis and treatment basis is provided for veterinarians.

The utility model discloses an energy storage system which comprises a box body, and a battery cluster, an energy storage high-voltage control box, a DC / DC device and an inversion device are arranged in the box body. The number of the battery clusters is multiple, the number of the energy storage high-voltage control boxes is the same as that of the battery clusters, and the input ends of the energy storage high-voltage control boxes are connected with the battery clusters in a one-to-one correspondence mode. The number of the DC / DC devices is multiple, each DC / DC device comprises a DC voltage stabilization channel, the DC voltage stabilization channels included in the multiple DC / DC devices are mutually independent, the number of the DC voltage stabilization channels is the same as that of the energy storage high-voltage control boxes, and the input ends of the DC voltage stabilization channels are connected with the output ends of the energy storage high-voltage control boxes in a one-to-one correspondence mode. The output end of the direct current voltage stabilization channel is electrically connected with the input end of the inversion device. By the adoption of the scheme, the problem of how to reduce circulating current and risks caused by direct-current confluence type design is solved.

The present invention discloses a coal gangue thermal activation calcination process based on a cement burning system, specifically, the coal gangue is first pretreated, then calcined and cooled, and then ultra-finely ground to obtain a high-activity calcined coal gangue mixed material; wherein, the low calorific value coal gangue is first sent to an indirect pre-burning device for rotary pre-burning, then sent to a rotary kiln for thermal activation calcination, and then sent to a grate cooler for cooling; the drying heat source of the indirect pre-burning device is the hot flue gas at the tail of the rotary kiln; the high calorific value coal gangue is directly sent to an indirect thermal activation device for thermal activation and rotary calcination, and then enters a single-drum cooler for cooling; the drying heat source of the indirect thermal activation device is the hot flue gas from the grate cooler of a normal cement clinker cement burning system; the volatile organic waste gas generated in the indirect pre-burning device and the indirect thermal activation device is sent to the kiln head for combustion. The present invention solves the environmental emission problem of volatile organic matter and the risk problem of suspended calcination of coal gangue in a preheater.

The invention discloses a power transmission line bird-related risk monitoring method, system and device based on multi-behavior recognition, and relates to the technical field of power transmission line protection monitoring, and the method comprises the following steps: obtaining a multi-modal monitoring data flow of bird activities in a target area; identifying a bird basic behavior event related to the power transmission line risk from the multi-modal monitoring data stream; based on the basic behavior event, generating a bird-related risk quantitative index curve with continuous time in real time; performing time sequence analysis on the bird-related risk quantitative index curve, and dynamically delimiting a risk time period matched with a bird activity rhythm by detecting a waveform interval conforming to a preset risk mode characteristic in the curve; and adjusting a protection strategy of the power transmission line based on the dynamically delimited risk time period. According to the invention, continuous quantitative characterization of the bird line-related risk and dynamic delimitation of the risk time period are realized, the timeliness and pertinence of bird-related risk monitoring are improved, and active protection and safe operation of a power transmission line are facilitated.

This invention provides a method for identifying the authenticity of wheat flour based on the fusion of Raman and near-infrared spectroscopy, belonging to the field of wheat flour authenticity identification technology. The method includes: acquiring Raman and near-infrared spectral data of the wheat flour sample to be tested, and preprocessing them separately; constructing and training a fusion detection model, which includes a data-level fusion module, a feature-level fusion module, and a decision-level fusion module; the data-level fusion module generates full-spectrum fusion data; the feature-level fusion module concatenates core features into a comprehensive feature set; the decision-level fusion module inputs the comprehensive feature set into a hybrid model; and the trained fusion detection model processes the comprehensive feature set to output the authenticity identification result of the wheat flour sample to be tested. This invention, through a three-level spectral fusion architecture and a dynamic adaptive adversarial mechanism, can effectively achieve high-precision and high-robust identification of wheat flour authenticity.

The production equipment comprises a tank body, a second motor is fixedly connected to the middle side of the upper portion of the tank body, the output end of the second motor is fixedly connected with a rotating shaft and penetrates through the tank body and an inner tank, and a plurality of stirring blades are fixedly connected to the outer side of the rotating shaft at equal intervals. And feeding valve mechanisms are arranged on the left side of the upper portion of the tank body and the middle side of the lower portion of the tank body, a second water inlet pipe is fixedly connected to the rear side of the upper portion of the tank body, and a first water inlet is fixedly connected to the upper side of the left portion of the tank body. According to the utility model, the fan-shaped stirring blades are driven by the motor to uniformly stir a microbial agent, so that the shearing force is reduced, oxygen is conveyed into the inner tank, and the growth and metabolism of aerobic microorganisms are promoted; the tank body is heated and insulated by the heating pipe and the insulating layer, and fungi are observed through the test tube and adjusted at any time, so that the yield and quality of the fungicide are improved.

The invention discloses a power grid technical improvement and overhaul project risk monitoring method, system and device and a medium, mainly relates to the technical field of project risk monitoring, and is used for solving the problems that information islands exist in a communication mechanism, potential illegal behaviors and risks are difficult to find and correct in time, technical improvement and overhaul projects adopt a unified processing mode, and the risk monitoring efficiency is high. And the problem of poor pertinence easily occurs. Comprising the steps of obtaining all technical renovation and overhaul projects, and determining key technical renovation and overhaul projects from all the technical renovation and overhaul projects; acquiring a risk monitoring program corresponding to each key technical improvement and overhaul project and a data acquisition system corresponding to each key technical improvement and overhaul project; establishing a connection relationship with a data acquisition system corresponding to each key technical improvement and overhaul project, and further obtaining acquisition data uploaded by the data acquisition system; and inputting the acquired data into a corresponding risk monitoring program to obtain a risk monitoring result.

The invention relates to the technical field of overhead conductor grounding, and discloses an overhead conductor grounding device and an overhead conductor grounding method. The overhead conductor grounding device comprises a stay wire clamp mechanism which can clamp an overhead conductor by means of an unmanned aerial vehicle; the pulley is fixed on one side of the staying wire clamp mechanism; the ground wire connecting piece female sleeve is fixed on one side of the standing wire clamp mechanism; the ground wire connecting piece male head can be clamped and matched with the ground wire connecting piece female sleeve, and the ground wire connecting piece male head is used for connecting a pull rope and a ground wire; the take-up and pay-off mechanism is used for taking up and paying off a pull rope and a ground wire, the end, away from the pull rope, of the ground wire is grounded, the end, away from the ground wire connecting piece male head, of the pull rope penetrates through the ground wire connecting piece female sleeve and bypasses the pulley to be connected with the balance weight, and the pull rope is used for pulling the ground wire connecting piece male head upwards to be clamped with the ground wire connecting piece female sleeve so as to achieve grounding of the overhead conductor. Manual tower climbing can be replaced for conducting wire grounding operation, and the problems of high risk and low efficiency of manual tower climbing operation are solved.

The invention belongs to the technical field of computer information security, and particularly relates to a human body posture data access system and method based on hierarchical encryption and dynamic access control. The method is executed by a data management platform server, and specifically comprises the following steps: receiving original human body posture data, and dynamically dividing the original human body posture data into a plurality of data layers with different sensitivity levels based on a multi-dimensional privacy sensitivity quantification result of the data; formulating different access control strategies for each data layer, and executing corresponding encryption operation on each layer of data; and executing identity verification and authorization operation based on the access request. The invention provides a human body posture data privacy protection management scheme which is balanced in control granularity and data utility, balanced in authority management and security demand and compliant in law.

The invention provides computer equipment for executing an inferior vena cava ultrasonic image real-time analysis and evaluation method in hemodialysis, the computer equipment comprises a memory, a processor and a computer program, when the processor executes the program, inferior vena cava ultrasonic image data in the hemodialysis process is obtained, the delay duration of inner diameter contraction response is recognized, and the delay duration is calculated; determining a latency plateau period duration based on a time period in which the inner diameter of the blood vessel is maintained relatively stable after the liquid removal speed is changed; according to the latency plateau period duration, when the blood vessel wall rebound speed is higher than the inner diameter contraction speed, high-elasticity reserve is recognized, and according to the inner diameter fluctuation range corresponding to the high-elasticity reserve, the blood volume safety range and the contraction speed threshold value are obtained; acquiring a blood volume measurement value at an ultrafiltration rate intervention time point, triggering reverse adjustment when the blood volume measurement value exceeds a blood volume safety range, and extracting a stable inner diameter contraction speed after the blood volume is stable.

The invention relates to a heterogeneous system organization user data synchronization method, system and device and a medium. The method comprises the following steps: acquiring user identity authentication information and organization protocol information corresponding to different application systems through a unified identity authentication module, and performing key application information configuration on each application system by an application configuration module according to the organization protocol information, and the data real-time acquisition module monitors and acquires the configured key application information and the to-be-synchronized user identity authentication information corresponding to the key application information, and outputs the configured key application information and the to-be-synchronized user identity authentication information to the data processing module. The updating information of the target data is calculated through the data processing module according to the to-be-synchronized user identity authentication information, and the updating information corresponding to the application system is synchronized through the synchronization module according to the attribute of the updating information. By adopting the method, synchronization of multi-strategy users and organization data can be realized, and the cost of integrated projects is effectively reduced.

The utility model relates to the technical field of water supply, in particular to a special pressurization water hammer resistant pipeline arrangement system based on the Tesla valve principle, which comprises a main pipeline and a branch pipeline connected with the main pipeline, and a booster pump, a stop valve, a safety valve and a pressure release valve are sequentially arranged on the main pipeline from front to back. The branch pipeline comprises a branch main pipe and a Tesla pipeline structure installed and connected to the branch main pipe, the Tesla pipeline structure comprises a water return ring, a water hammer absorber, a short-distance bent pipe and two inclined three-way assemblies, and the upper ends of main straight pipes of the two inclined three-way assemblies are connected to the two ends of the water return ring respectively; the lower end of the main straight pipe is connected to the branch main pipe, the two ends of the short-distance bent pipe are connected with the inclined branch pipes of the two inclined three-way assemblies respectively, and the water hammer absorber is installed and connected to the short-distance bent pipe. According to the system, the water hammer resistance, the pressure supply capacity, the safety, the large flow and the water use experience feeling are guaranteed.

The application discloses a kind of secondary frequency control method, device and storage medium based on neural network, belong to microgrid control technical field, method includes: obtaining the rated angular frequency of distributed microgrid preset, and the active power of each distributed power generation unit;Active power is respectively input into the corresponding pre-trained neural network, and the frequency compensation of each distributed power generation unit is output, the frequency deviation caused by droop control is compensated, so that the angular frequency of distributed microgrid output recovers to the rated angular frequency preset;Corresponding pre-trained neural network refers to the neural network that each distributed power generation unit corresponds one training process and is added privacy protection processing, so that attacker cannot infer whether single sample is used for the training of neural network according to neural network output result.The application can improve the security and stability of microgrid, solve the problem that traditional secondary frequency control method exists privacy leakage risk and security risk.

The application provides a cofferdam type construction structure of a conical prefabricated caisson foundation and a construction method thereof. The conical prefabricated caisson foundation comprises a conical bottom caisson constructed in a dry dock, and a conical side wall coaxially arranged in a central region and constructed in a wet dock. A water stop connecting member is arranged on the top of the conical bottom caisson and surrounds the periphery of the conical side wall. A cofferdam main body is arranged on the top of the water stop connecting member, and the cofferdam main body comprises a bottom initial section which is installed in the dry dock. By using the construction scheme of sitting on the bottom and increasing the height in the wet dock, the safety risks of overturning, failure of mooring system and damage of facilities during the construction of the traditional floating pouring method in the typhoon period are fundamentally solved, and the stability and safety of the caisson height increasing process are significantly improved. By arranging the cofferdam main body which is installed in stages, the stability of the caisson during the two floating processes of floating to the wet dock and floating to the pier position is ensured, and a whole-process dry operation environment is provided for the caisson sitting on the bottom and increasing the height in the wet dock.

The invention discloses a project progress prediction method and system based on machine learning, and the method comprises the steps: collecting and integrating project data, and carrying out the preprocessing and feature engineering of the project data; determining a project life cycle, and performing project risk prediction on the project; and performing project progress prediction on the project based on the feature engineering and the project risk prediction result. According to the method, the progress prediction accuracy is improved, dynamic risk assessment and model adaptation are realized, and the project management effect is enhanced.

The utility model relates to the technical field of three-north antenna equipment, and discloses an active wired antenna device with a three-north short message function, which comprises a three-north host and an antenna device, the antenna device comprises a power supply module, a data conversion module, a three-north module and a three-north antenna, the power supply module is electrically connected with the third north host, the data conversion module and the third north module, the data conversion module is in signal connection with the power supply module and the third north module, the third north module is in signal connection with the third north antenna, and the third north module is also in signal connection with a Beidou card. The antenna has the advantages of effectively solving the problem of antenna gain loss, and being low in cost and convenient to install.

The utility model provides cold header die automatic replacement mechanism relates to cold header die replacement technical field, the utility model discloses fixed installation nitrile rubber sucking disc on the bottom surface of negative pressure cylinder, the inside sliding joint of negative pressure cylinder has piston board, the surface fixed mounting of piston board has push away link, the one end fixed mounting of push away link away from piston board has the lifting plate, the both sides surface of negative pressure cylinder all fixed mounting has first fixed plate and second fixed plate first fixed plate's surface fixed mounting has first electric telescopic handle, second fixed plate's surface fixed mounting has second electric telescopic handle, the utility model discloses through adsorption clamping double fixed device, makes and utilizes the automatic collaborative action of negative pressure adsorption and mechanical clamping, need not manual intervention to change the mould link, solves the problem that traditional manual change mould leads to long equipment downtime and high security risk, guarantees the continuous operation of cold header automatic production line, improves equipment comprehensive utilization rate.