170results about How to "Improve safety and reliability performance" patented technology

The invention discloses a power operation mode intelligent arrangement and risk prevention and control method under mass new energy access, and relates to the technical field of power system operation control, and the method comprises the steps: constructing a main distribution network architecture data model, carrying out the fusion processing of dynamic data of different voltage levels and professional attributes, and generating a system operation state model; based on the system operation state model, topological structure analysis is executed, and a network connection relation model is established; and calculating a new energy access optimization scheme according to the network connection relation model, and generating an operation mode arrangement result and a risk prevention and control strategy. According to the method, the problems of data islands and inaccurate topology identification in the prior art are effectively solved. By constructing the multi-objective optimization model, the new energy access capacity can be scientifically evaluated, the optimal operation scheme can be generated, and the operation efficiency, safety and reliability of a power system under the condition of massive new energy access are remarkably improved.

The invention provides a silver paste composition and a preparation method and application thereof. The silver paste composition comprises the following components in parts by weight: 80-120 parts of silver-containing filler, 20-40 parts of an organic solvent, 5-15 parts of a non-noble metal auxiliary agent with an atomic number of 24-30, 8-10 parts of a peroxide organic auxiliary agent and 1-5 parts of a rheological agent, the silver-containing filler comprises elemental silver powder and a silver-containing compound, and the weight ratio of the elemental silver powder to the silver-containing compound is (18-20): 1; the elemental silver powder comprises micron-scale silver powder and nano-scale silver powder; the silver-containing compound is selected from one or more of silver carbonate, silver lactate, silver formate, silver citrate and silver oxide. According to the low-temperature pressure sintered silver paste composition, low-temperature and low-pressure sintering of the silver paste composition is achieved by adding nano-scale and micron-scale silver powder, a metal precursor, a non-noble metal auxiliary agent and the like.

The invention relates to a ship main engine oil consumption modeling method and system based on noon report data, and the modeling method comprises a noon report data collection and screening step, a noon report data classification step, a ship type classification step, a partial load condition fitting modeling step and a unified fitting and draught correction modeling step. Modeling operand and modeling complexity are greatly reduced, meanwhile, multi-level classification of weather (wind level and wave level) and ship types under different dimensions is carried out, a plurality of ship main engine oil models are constructed by adopting a partial load condition fitting method, a unified fitting method and a draught correction method respectively, ship slip rate is adopted as an intermediate variable, and a ship main engine oil model is constructed. According to the method, the relation between the navigational speed and the ship slip rate and the relation between the oil consumption and the ship slip rate are fitted respectively, the fitting flexibility and the formula complexity are improved, the fitting effect is better, the multiple built ship main engine oil models are accurate and efficient, cost reduction, efficiency improvement and safe and reliable performance improvement of enterprises are facilitated, and environmental protection and compliance management can be promoted.

The invention belongs to the technical field of power control, and discloses a connection power supply anti-reverse-current intelligent control system. Comprising a data acquisition module used for acquiring historical power data; the data prediction module is used for analyzing the historical power data and predicting future power data; the reverse electricity detection module is used for analyzing future power data and judging whether a reverse electricity instruction is generated or not; the reverse electricity analysis module is used for analyzing a reverse electricity type based on future power data if the reverse electricity instruction is generated; the dynamic adjustment module is used for fusing the reverse electricity type and future power data and formulating a dynamic adjustment strategy; the reverse electricity early warning module is used for executing the dynamic adjustment strategy and judging whether an early warning instruction is generated or not; according to the invention, a reverse power phenomenon can be effectively monitored and prevented, and the safety and stability of a shore power system are improved; the power supply management is optimized, the equipment damage risk is reduced, and the overall operation efficiency, safety and reliability of the power system are improved.

The invention provides a preparation method of a multilayer reinforced alkaline water composite diaphragm. The preparation method comprises the following steps: S1, preparing raw materials; the raw materials comprise polysulfone, zirconium dioxide, polyethylene glycol, polyvinylpyrrolidone, potassium chloride, methyl pyrrolidone and a PEEK woven net; s2, preparing slurry; s3, preparing a film; the high-temperature alkaline electrolytic cell diaphragm has the beneficial effects that the PEEK woven mesh is adopted as the reinforced framework layer, the melting point of a PEEK material is 340 DEG C, the melting point of pps is about 280 DEG C, the heat resistance of the PEEK material is obviously higher than that of pps mesh cloth, and the heat resistance and safety of the diaphragm are greatly improved when the diaphragm is applied to a high-temperature alkaline electrolytic cell (greater than 100 DEG C) in the future.

The invention relates to the technical field of electric power measurement, and discloses a data interaction system based on a special transformer terminal interface short-circuit protection test. Comprising the steps of constructing a basic scene, dividing an interface into a target interface and a test interface, converting the interface into a simulation test scene, obtaining comprehensive test data, calculating an interface short-circuit coefficient, constructing an interaction channel with a sub-channel, importing a test data packet into the sub-channel, and controlling ordered interaction of the test data. Compared with the prior art, related test parameters and variables can be conveniently and quickly changed in a simulation test environment, and meanwhile, based on an interaction channel, related test data in an interface short-circuit protection test can be controlled to realize efficient and smooth bidirectional interaction between the test tool and the special transformer terminal; the terminal participating in the interface short-circuit protection test can timely and comprehensively understand the test result, and accurate data support is provided for subsequent evaluation of the safety and reliability of the special transformer terminal.

The invention relates to a deep-sea mining flexible mixed transportation pipe pneumatic lifting experiment system and method, the system comprises an air compressor, a pneumatic pump, a transparent experiment pipeline, a camera, a mixing chamber, a three-phase separator, a premixing distributor and a water tank, and a flowmeter is connected between the pneumatic pump and the air compressor; the top and bottom ends of the transparent experimental pipeline are respectively connected with a three-phase separator and a pneumatic pump, a pressure sensor and a particle concentration detector are arranged in the transparent experimental pipeline, and a camera is arranged outside the transparent experimental pipeline; the mixing chamber is connected with a pneumatic pump and is provided with a liquid level meter and a particle concentration detector; the solid collecting box and the liquid collecting box are respectively connected with the three-phase separator and are respectively provided with a liquid level sensor and a weighing sensor; the premixing distributor and the water tank are respectively connected with the three-phase separator and the mixing chamber; the particle concentration detector, the weighing sensor, the camera, the pressure sensor, the liquid level meter, the flow meter, the liquid level sensor and the premixing distributor are respectively connected with a computer; feeding concentration and bubble characteristics can be controlled, and the pneumatic lifting efficiency of the deep-sea mining pipeline can be improved through cyclic lifting experiments and research.

The invention provides a modularized multi-level direct-current transformer topology suitable for a multi-voltage-level direct-current power grid and a control method. The topology comprises a bridge arm inductor, an upper bridge arm, a lower bridge arm and a filter inductor. One end of the bridge arm inductor is connected with the high-voltage side anode, and the other end is connected with one end of the upper bridge arm; the other end of the upper bridge arm is connected with one end of the lower bridge arm and one end of the filter inductor; the other end of the lower bridge arm is respectively connected with the high-voltage side cathode and the low-voltage side cathode; the other end of the filter inductor is connected with the low-voltage side anode; each of the upper bridge arm and the lower bridge arm comprises a sub-module string, each sub-module string comprises a plurality of sub-modules which are sequentially connected in series, and the voltage of each of the upper bridge arm and the lower bridge arm is adjusted by controlling the input number of the sub-modules, so that direct-current voltage conversion among different voltage levels is realized. Through the application of the upper and lower chain type sub-modules, the use of complex components is reduced, the cost and the control difficulty are reduced, and meanwhile, the safety, reliability and efficiency of the system are improved.

The utility model discloses a construction integrated platform system applied to a high-rise building, which belongs to the technical field of high-rise building construction and comprises a climbing frame body, at least one of a gantry steel frame column guide rail combined frame and a gantry steel frame column vertical main frame combined frame is fixedly connected with one or more building construction operation platforms; the first attachment supporting assembly and the second attachment supporting assembly are used for fixedly installing the gantry steel frame column guide rail combined frame and / or the gantry steel frame column vertical main frame combined frame on the side wall of a building; and the interactive power device comprises a first driving assembly used for vertically lifting or descending the gantry steel frame column vertical main frame combined frame, and a second driving assembly used for vertically lifting or descending the gantry steel frame column guide rail combined frame. According to the utility model, automatic vertical lifting with low cost and high reliability can be realized, and a safe and stable operation platform and protection can be provided.

The utility model discloses a miniature primer shell capable of preventing a detonator from falling off, which comprises a charging shell, a detonator insertion tube and a clamping sleeve, the charging shell and the detonator insertion tube are connected into a whole, the bottom of the detonator insertion tube is conical, and a plurality of expansion joints extending along the vertical direction are arranged at the bottom of the detonator insertion tube. A plurality of circles of grooves distributed from top to bottom are formed in the conical surface of the bottom of the detonator insertion tube; the clamping sleeve is arranged on the detonator insertion tube in a sleeving manner; two circles of convex ribs which are distributed up and down and are matched with the grooves are arranged on the inner wall of the clamping sleeve. The expansion joint is arranged at the bottom of the detonator insertion tube, namely the insertion opening can be expanded and contracted, the size range of the insertion opening is increased, the detonator insertion tube is suitable for insertion of a detonator with the diameter slightly larger than or slightly smaller than that of the insertion opening, the application range is increased, the clamping sleeve is pulled downwards, and the detonator can be clamped at the bottom of the detonator insertion tube. And the use efficiency, safety and reliability are improved.

The present invention discloses a circuit for automatically switching polarity of a single cell in a series battery pack, comprising a single cell, both ends of the single cell are electrically connected to an automatic switch switching circuit, both ends of the single cell are electrically connected to a DMOS automatic polarity switching circuit through respective automatic switch switching circuits, and the DMOS automatic polarity switching circuit is electrically connected to a supercapacitor. The present invention adds a group of automatic polarity switching circuits composed of DMOS between the supercapacitor and the node of the series battery pack, reduces the number of lines between the supercapacitor and the node of the series battery pack, and only half of the original number of lines is needed to achieve the same effect, greatly reducing the cost and the complexity of the lines, simplifying the control program logic, and improving the safety, reliability and flexibility of the balanced charging and discharging of the series battery pack.

The application provides a kind of based on double-layer optimization model electric vehicle participates in power grid frequency modulation determination method and system, it is related to smart grid and electric vehicle technical field.The method comprises: based on the historical charging cost data of electric vehicle and the historical subsidy income data of participating in power grid frequency modulation, establishes first layer optimization model, determines the comprehensive income value of to be evaluated object, based on the time-of-use electricity price introduced random noise, the charging probability of to be evaluated object in different period is calculated, further determines the frequency modulation willingness evaluation value of to be evaluated object;Power distribution network frequency fluctuation model is constructed to be used to establish second layer optimization model, to quantify the evaluation based on the total load of power grid caused by to be evaluated object power grid fluctuation amount;According to optimization strategy, first layer optimization model and second layer optimization model are double-layer iteration optimization, and the frequency modulation participation evaluation value after optimization is obtained, to determine the frequency modulation participation evaluation value of to be evaluated object.The application realizes the charging cost of user side is lower while improving the stability of power grid.

The application discloses a kind of multi-party privacy calculation method, device and system based on blockchain, and the method steps include: in task execution phase, task executor receives ciphertext proof sent by trusted third party, ciphertext proof is generated according to the data fingerprint generated by task executor and task publisher generated task ID, and chain is uploaded with task ID and ciphertext proof;In task result verification phase, task executor provides random sampling data to task publisher, to challenge randomly the data used in execution process, verify whether the execution data of task executor contains sampling data, in random challenge, the data fingerprint of the data participating in task by sampling in task publisher is sent to trusted third party with task ID, after obtaining ciphertext proof from blockchain, verify using challenge key to decrypt ciphertext proof.The application has the advantages of simple implementation method, high safety and reliability, verifiable correctness of task execution result, verifiable task work proof and the like.

The utility model provides a wind power tower drum with a reinforcing function, which comprises a tower drum body, a concrete reinforcing member and a stress framework, the stress framework comprises a plurality of fastening hoops which are tightly held outside the tower drum body, a plurality of vertical connecting rods which are connected with the fastening hoops in a penetrating mode, a plurality of elastic adjusting rings which are tightly held outside the vertical connecting rods, and a reinforcing net which is tightly bonded with the concrete reinforcing piece. The fastening hoops and the elastic adjusting rings are alternately arranged in the axial direction of the tower drum body. The multiple vertical connecting rods are arranged in the circumferential direction of the fastening hoop. The reinforcing net is connected between the adjacent fastening hoops; the concrete reinforcing piece comprises a first-stage concrete reinforcing area, and the first-stage concrete reinforcing area is arranged between the reinforcing net and the tower drum body. The utility model has the advantages of reinforcing and supporting effect, reducing the phenomena of cracking of the outer surface of the concrete and falling of part of the concrete, and the like.

The utility model provides a battery pack and electric equipment, and the battery pack comprises a box body which is internally provided with a containing cavity; the battery pack is positioned in the accommodating cavity; the wire harness fixing assembly is located in the containing cavity, the wire harness fixing assembly and the battery pack are arranged in a spaced mode, the wire harness fixing assembly comprises a fixing body, a clamping groove is formed in the end, in the third direction, of the fixing body, and the clamping groove is used for clamping a conducting bar; the fixing piece is connected with the end, deviating from the clamping groove in the third direction, of the fixing body. And the binding belt is arranged on the fixing piece and is used for fixing the wire harness. The wire harness and the conducting bar are separately arranged through the wire harness fixing assembly, contact or friction between the wire harness and the conducting bar can be effectively avoided, and therefore the phenomenon that the wire harness is broken or locally short-circuited is avoided.

The invention discloses a power monitoring network security intelligent inspection system and method, and the system comprises a data collection unit, a data transmission verification unit, a data transmission unit, an alarm and response unit, an electrical fire monitoring unit, a power state monitoring unit, a man-machine interaction unit, and a central processing unit. Wherein the data acquisition unit is in communication connection with the central processing unit through the data transmission unit, and other units are directly in communication connection with the central processing unit. Existing equipment in an existing power monitoring network is simply transformed, the data transmission state is verified before data transmission is collected, multiple judgment is carried out on the operation state of the power equipment, and the intelligent, safe and reliable performance of power monitoring network inspection is guaranteed.

The application discloses a system control method and device based on a power system, a storage medium and a computer device, and relates to the technical field of power system control. The method comprises the following steps: obtaining target state information of the power system. The target state information is system load or system frequency. Then, the target state information is updated according to a target update model. The target update model comprises a target update strategy, and the target update strategy is used for enabling the target update model to identify and cope with multi-source disturbances, wherein the multi-source disturbances comprise at least two of engine mechanical disturbances, load disturbances and power grid power disturbances. Then, the power system is controlled to operate according to the updated target state information. The embodiment of the application improves the anti-disturbance capability of the power system, thereby guaranteeing the safe and reliable operation of the power system.

The utility model discloses a suspension arm for assembly operation of a wind generating set, which comprises a hoisting platform horizontally arranged, a suspension arm mechanism used for forming a telescopic suspension arm structure, a hoisting mechanism used for anti-drop hoisting of accessories of the generating set, and a buffer mechanism used for providing buffer support for the suspension arm, the lifting arm mechanism is arranged on one side of the upper end of the lifting platform, the lifting mechanism is assembled at one end of the lifting arm mechanism, and the buffering mechanism is arranged at the upper end of the lifting platform corresponding to the lifting arm mechanism. Components in the wind generating set are hoisted and assembled through the hoisting basket, the components can be prevented from falling off while the hoisting stability is guaranteed, the hoisting requirements of the components of different wind generating sets in different environments are met, the buffering mechanism is arranged, buffering supporting can be provided for the hoisting arm, and the hoisting efficiency is improved. And rigid collision and damage caused by large potential energy when the suspension arm falls back are avoided.

The invention is suitable for the field of structural walls, and provides a steel grid wall structure provided with an energy dissipation component, which comprises edge frame columns, edge frame beams, grid components, lug plates and low-elasticity high-damping components, the edge frame columns and the edge frame beams are connected to form a frame, the lug plates are arranged on the inner sides of the edge frame columns and the edge frame beams, and the low-elasticity high-damping components are arranged on the inner sides of the edge frame columns and the edge frame beams. And the low-elasticity high-damping component is used for connecting the grid component and is arranged on the grid component. During use, the low-elasticity high-damping component is arranged in the grid component, compared with a traditional steel grid wall structure system, the steel grid wall structure system has the advantages of being clear in damage mode, concentrated in energy consumption and efficient, and effective control over a structural plasticity development area can be achieved.

The invention belongs to the technical field of scraper conveying equipment, and particularly relates to a movable scraper conveyor which comprises a scraper chain assembly and a conveyor body, a support is fixedly connected to the bottom end of the conveyor body, universal wheels are installed at the four bottom ends of the support, and a PLC is fixedly connected to the outer wall of the support. The working stability of the movable type scraper conveyor can be effectively improved, the situation of material conveying errors is avoided, then the material conveying reliability is improved, the conveyor has the material humidity detection function, wet materials on the scraper chain assembly can be accurately recognized and cleaned, the material conveying speed is increased, and the conveying efficiency is improved. In addition, in the dry material conveying process, the conveyor further has the functions of collecting dust materials and removing static electricity, the conveying efficiency and the safety coefficient are powerfully improved, and the conveyor can convey materials more efficiently and reliably.

The application provides a new energy mine truck thrust rod fatigue life prediction method, belonging to the field of federated learning and application technology. First, a multi-mine area multi-source fatigue feature dataset is constructed. Then, a double-layer neural network structure based on Bayesian modeling is designed, including a sparse prior generation module, a thrust rod time series feature encoding module and a thrust rod residual life Bayesian prediction module, to realize model parameter sparsification, time series feature expression and uncertainty quantification. Further, a graph structure based federated training and information aggregation mechanism is adopted, combined with global aggregation and local graph modeling strategy, to realize knowledge sharing and personalized adaptation between different mine areas. Finally, an online fine-tuning mechanism based on uncertainty driving is proposed, realizing rapid adaptive optimization of the global model in the new mine area environment through Bayesian inference. The method can significantly improve the accuracy, robustness and cross-domain generalization ability of thrust rod life prediction while ensuring data privacy.

The utility model relates to a drawing type wiring low-voltage cabinet, which comprises a cabinet body divided into a drawer chamber, a secondary cable chamber, a cable incoming and outgoing line chamber and a bus chamber, the secondary cable chamber is arranged on the right side of the drawer chamber, and the cable incoming and outgoing line chamber is arranged on the rear side of the drawer chamber and the secondary cable chamber. The bus chamber is arranged on the upper sides of the drawer chamber, the secondary cable chamber and the cable inlet and outlet chamber, a terminal strip capable of sliding back and forth is installed in the secondary cable chamber through a guide rail mechanism, the guide rail mechanism comprises guide pieces fixed on the cabinet body at intervals up and down, the guide pieces are provided with sliding pieces matched with the guide pieces, and the terminal strip is fixed at the front ends of the sliding pieces. A terminal side wire harness connected with the terminal strip is correspondingly fixed on the guide piece and the sliding piece through two fixing points, the terminal side wire harness between the two fixing points forms a U shape, and the length of the terminal side wire harness between the two fixing points is greater than or equal to the maximum sliding distance of the sliding piece relative to the guide piece. The LED lamp has the advantages of simple structure, convenience in maintenance and good heat dissipation effect.

The invention belongs to the field of digital pressure sensor design, and particularly relates to a split type multi-redundancy air pressure height sensor for an ejection seat. An existing air pressure height sensor product cannot meet the use requirement of an ejection seat. The device comprises a redundancy pressure sensitive assembly and a signal conditioning module which are spatially isolated, the redundancy pressure sensitive assembly and the signal conditioning module are connected through a cable and an electric connector, the redundancy pressure sensitive assembly comprises a filler neck, a sintering base, a conversion plate and an outer sleeve which are sequentially connected and installed, and a plurality of packaged pressure sensors are arranged in the filler neck. The air pressure height measurement function in the flight process of an aircraft and after ejection of a seat can be completed, meanwhile, the requirement for quick response is met by adopting a hardware and software collaborative design mode, and the requirements for impact resistance, high temperature resistance and easy installation of the sensor are met by adopting the split design of the multi-redundancy pressure sensor and the sensor signal conditioning module.

The utility model relates to a terminal for fuse and fuse with the terminal, the fuse still includes the fuse body, the terminal includes: the terminal main part, it includes by the first conductive material integral manufacture's fuse connecting part and cable connecting part, wherein the fuse connecting part is adjacent the fuse arrangement, the cable connecting part is arranged in the side of the fuse connecting part away from the fuse and is equipped with the terminal hole for connecting with external cable, the conductive layer is made by the second conductive material of the conductivity greater than the first conductive material and is welded to the side of the fuse connecting part facing the fuse, to make the fuse can be connected to the fuse connecting part via the conductive layer, the reinforcing structure is made by the third conductive material of the hardness greater than the first conductive material and surrounds the circumferential extension of the terminal hole, to make the reinforcing structure cover the hole wall of the terminal hole.

The invention relates to the field of aviation fuel, and discloses a high-flash-point jet fuel and a production method thereof. The method comprises the following steps: mixing raw material oil with hydrogen, and feeding the mixture into a hydrofining reactor containing a hydrofining catalyst for hydrofining reaction to obtain a refined effluent; wherein the raw material oil is straight-run diesel oil, the density of the raw material oil at 20 DEG C is 820-840 kg / m < 3 >, and the sulfur content is not greater than 1.0 wt%; introducing the refined effluent into a hydrocracking reactor containing a hydrocracking catalyst, carrying out a hydrocracking reaction, and fractionating the obtained cracked effluent to obtain a naphtha fraction, a kerosene fraction, a diesel fraction I and a diesel fraction II; and carrying out gas-liquid separation on the diesel fraction I to respectively obtain a light component which can be circulated for fractionation and a heavy component which is taken as a high-flash-point jet fuel product and is discharged from the device. According to the method, the high-flash-point jet fuel can be stably produced at low cost, the flash point of the high-flash-point jet fuel is higher than 60 DEG C, and the quality of the high-flash-point jet fuel product is improved.

The invention discloses a connection structure of aluminum alloy and decorative strips of a soundproof glass curtain wall, which relates to the technical field of building decoration. The invention comprises an aluminum alloy column, and aluminum alloy cross beams are respectively connected to both sides of the aluminum alloy column. An inner layer of curtain wall glass, a sound insulation board, and an outer layer of curtain wall glass are sequentially stacked on the outer surface of the aluminum alloy cross beam. The inner layer of curtain wall glass, the sound insulation board, and the outer layer of curtain wall glass are bonded to each other by a composite adhesive. The aluminum alloy column is connected to the aluminum alloy decorative strip through an adapter. The adapter and the aluminum alloy column are connected by a first bolt. At least one bolt slot is provided on the aluminum alloy column. The head of the first bolt is clamped in the bolt slot. The screw portion of the first bolt passes through the adapter and is threadedly connected to the adapter through a nut, so that the first bolt is easy to tighten, which not only reduces the phenomenon of cold bridges, but also has a reasonable structure, simple and quick installation, and good sound insulation effect.

The invention relates to an automatic air supply system for a hot isostatic pressing air source. A one-key starting instruction module, a liquid argon leading-out control module, a low-temperature liquid pump starting module, a vaporizer vaporization control module, a pressure monitoring and valve group switching module, a pressurization mode adaptation module, a continuous gas production guarantee module, a storage tank group management module, a hot isostatic pressing machine PLC control module and a safety protection module are arranged in the gas source PLC control cabinet; through cooperative work of all the modules, full-process automatic control of liquid argon exporting, pre-cooling, vaporization, storage in the storage tank, equipment gas supply and mode switching is achieved, manual intervention is not needed, the technical defects of an existing gas supply mode are effectively overcome, and the gas supply efficiency, stability, safety and reliability of the hot isostatic pressure gas source are improved.

This invention discloses an intelligent optimization method and system for the cold-end system of a coal-fired power unit considering electricity prices, relating to the field of thermal power generation technology. The method includes the following steps: acquiring real-time node electricity prices, predicted electricity price sequences, and operating parameters of the coal-fired power unit, including generator output power, real-time back pressure, circulating water temperature, circulating water pump operating frequency, and cooling fan speed. This invention constructs a dynamic safe operating range through a turbine back pressure safety sub-model, a circulating water pump safety sub-model, and a cold-end thermal stress safety sub-model, improving the operational safety and adaptability of the cold-end system. Through dual-objective Pareto optimization of economics and energy consumption, and adaptive screening of the coal-to-electricity value ratio, it achieves optimal operating decisions under different electricity price environments. Simultaneously, it incorporates equipment lifespan loss costs into the optimization process and, in conjunction with safety constraints limiting frequent adjustments, effectively reduces equipment wear and improves the overall economic efficiency, energy saving, and operational stability of the coal-fired power unit throughout its lifecycle.

The utility model provides a compacted strand process steel wire rope, which is characterized in that the periphery of the outer-layer steel wire of the central strand is provided with a concave steel wire cambered surface, and the inner-layer strand is tightly twisted on the steel wire cambered surface, so that the steel wire rope can be more tightly twisted, the torsion resistance of the steel wire rope is improved, the steel wire rope can be kept stable under a high-load condition, and the service life of the steel wire rope is prolonged. The risks of loosening and deformation of the steel wire rope are reduced; gaps between the inner-layer strands and the polyamide resin layer are filled with the triangular strands, so that combination in the steel wire rope strands is tighter, the strength of the steel wire rope is guaranteed, the oil storage strands are arranged, grease can infiltrate among the strands of the steel wire rope in the using process, abrasion and corrosion of the steel wire rope can be effectively reduced, and therefore the service life of the steel wire rope is prolonged. Meanwhile, the arrangement of the polyamide resin layer, the protective net layer and the wear-resistant layer also ensures the flame retardance, corrosion resistance and wear resistance of the steel wire rope. Therefore, the design structure is compact, the torsion resistance is excellent, the service life is prolonged, and the structural stability, safety and reliability are achieved.

This utility model relates to the field of bellows control valve technology, and in particular to an integrated welded bellows control valve, comprising a valve body with a flow channel, a matching valve seat and valve core on the flow channel, a valve stem on the valve core, a bellows, an upper valve cover support ring, and a connecting pipe. One end of the connecting pipe is welded to the valve body, and the other end of the connecting pipe is fixedly connected to the upper valve cover. The support ring is sealed between the other end of the connecting pipe and the upper valve cover. In use, this integrated welded bellows control valve replaces the original separate bellows seal with a seal between the integrated welded bellows connecting pipe and the upper valve cover, a seal between the upper valve cover and the valve stem, and a welded seal between the connecting pipe and the valve body. This multi-seal structure greatly reduces the possibility of media leakage. Simultaneously, the anti-rotation mechanism between the valve core and the valve body further stabilizes the valve structure, thereby improving the valve's sealing performance and safety reliability.