91results about How to "Guaranteed thermal stability" patented technology

The invention relates to the technical field of building construction materials, in particular to low-carbon high-performance concrete and a preparation method thereof. The low-carbon high-performance concrete is prepared from the following preparation raw materials in parts by mass: 150 to 180 parts of Portland cement, 24 to 27 parts of sulphoaluminate cement, 120 to 150 parts of activated coal gangue powder, 60 to 80 parts of fly ash, 600 to 700 parts of gravel, 60 to 65 parts of modified basalt fiber, 20 to 25 parts of limestone powder, 10 to 12 parts of light calcined magnesia, 2 to 3 parts of accelerant, 7 to 10 parts of modified polycarboxylate superplasticizer and 180 to 220 parts of water. According to the low-carbon high-performance concrete disclosed by the invention, excellent mechanical properties and durability are ensured, the environmental protection targets of low cost and low carbon emission are achieved, and a new solution is provided for sustainable development of concrete materials.

The invention relates to a modified epoxy resin adhesive and a preparation method thereof, and belongs to the technical field of high polymer materials. The modified epoxy resin adhesive comprises the following components in parts by weight: 90-120 parts of epoxy resin, 8-25 parts of a curing agent, 1-3 parts of a diluent, 0.5-5 parts of a curing accelerator, 4-18 parts of graphite, 1-4 parts of a modified flexibilizer and 10-30 parts of nano diamond / boron nitride (PDA), a polyurethane single soft and hard segment structure and a high-temperature-resistant oxazolidinone ring in the modified toughening agent cooperate with poly (p-phenylene ether sulfone) resin, so that the toughness is effectively enhanced, and crack propagation is inhibited; boron nitride is modified by nano-diamond, wear resistance is optimized, good electric insulativity and chemical corrosion resistance are given to a matrix, polydopamine can promote a compound to be evenly dispersed in the epoxy resin matrix, wear resistance and adhesive force are improved, and the prepared modified epoxy resin adhesive has good toughening and wear-resisting effects and also has the advantages of being good in toughness, good in toughness and good in wear resistance. And the cable also has excellent high temperature resistance, corrosion resistance and electric insulation effects.

The invention relates to the technical field of ceramic materials, in particular to vanadium-based zircon microwave dielectric ceramic and a preparation method thereof.The vanadium-based zircon microwave dielectric ceramic is prepared from, by weight, Bi2O3, La2O3, CeO2, Nd2O3, Sm2O3 and NH4VO3, the chemical formula of the vanadium-based zircon microwave dielectric ceramic is (Bi < 0.2 > La < 0.2 > Ce < 0.2 > Nd0. 2Sm < 0.2 >) VO4, powder of Bi2O3, La2O3, CeO2, Nd2O3, Sm2O3 and NH4VO3 is obtained based on the components of the vanadium-based zircon microwave dielectric ceramic by weight, and original powder is obtained; stirring and mixing the original powder, performing wet grinding treatment and drying treatment to obtain dried powder, and pre-sintering the dried powder in the air atmosphere to obtain pre-sintered powder; a binder is added into the pre-sintered powder for granulation, compression molding is carried out, sintering is carried out in the air atmosphere, the vanadium-based zircon microwave dielectric ceramic is obtained, the vanadium-based zircon microwave dielectric ceramic has the near-zero resonant frequency temperature coefficient, the thermal stability of a device can be guaranteed, and the service life of the device is prolonged. The method is widely used for manufacturing microwave devices such as various dielectric antenna substrates, resonators and filters.

The invention relates to the technical field of epoxy resin, in particular to an epoxy resin composition for high-strength carbon fiber winding and a preparation method thereof.The preparation method of the epoxy resin composition comprises the steps that S1, modified epoxy resin, a compatilizer, a retarder, a defoaming agent and nano filler are added into a reaction kettle and mixed and stirred, and a mixture A is obtained; s2, a composite curing agent is added into the mixture A, stirring and mixing are conducted, and the epoxy resin composition is obtained and has the advantages of being appropriate in viscosity, good in heat resistance, excellent in impact resistance, large in bending strength, small in volume shrinkage rate in the curing process, moderate in gelation time and capable of being wound with carbon fibers conveniently to prepare the composite material.

The invention provides a cooling system of a coupling type linear acceleration device, which comprises a coupling piece and two accelerators, the two accelerators are coupled and connected by the coupling piece to form the coupling type linear acceleration device, and the coupling piece and the accelerators are internally provided with cooling channels for a cooling medium to flow; the cooling channel is connected with an external cooling medium conveying device; according to the characteristics of the coupling type linear acceleration device, the coupling piece and the accelerator are independently cooled, so that the temperature rise, deformation and frequency drift of the coupling type linear acceleration device are controlled within a controllable range, and the operation stability of the coupling type linear acceleration device is guaranteed.

The invention discloses a coal-based n-alkane phase change material optimization extraction method based on a data-driven model, and relates to the technical field of data processing. The method comprises the following steps: step 1, collecting experimental data of coal-based n-alkanes; constructing a coal sample feature vector based on the experimental data; 2, constructing a dissolution selectivity prediction model based on the coal sample feature vector and a dissolution parameter matrix of the coal sample; 3, constructing a multi-field coupling transmission equation; establishing a separation efficiency prediction model and a phase change performance prediction function according to a multi-field coupling transmission equation; establishing a crystallization process control equation, and solving the crystallization process control equation to obtain the crystallinity; step 4, constructing a multi-objective optimization function; solving a multi-objective optimization function to obtain an optimal process parameter combination; according to the method, the energy consumption and the production cost are remarkably reduced while the material purity and the extraction efficiency are ensured.

The invention relates to the technical field of optical glass manufacturing, in particular to high-refractive-index glass as well as a preparation method and application thereof. The transition metal is less than 4 ppm by mass, and the transition metal comprises one or more of Fe, Cr, Ni, Cu, Mn, Co and V; the oxide is prepared from the following components in mole percent based on the oxide: 17 mol% to 49 mol% of Bi2O3, 2.7 mol% to 15.7 mol% of Nb2O5, 8.5 mol% to 39 mol% of TeO2, 2 mol% to 19.5 mol% of P2O5, 11.3 mol% to 41 mol% of B2O3, 0 mol% to 1 mol% of TiO2, 0 mol% to 1 mol% of Ta2O5, 0 mol% to 1 mol% of WO3 and 0.5 mol% to 16.5 mol% of ZnO, and Bi2O3 / (TeO2 + TiO2 + WO3 + Nb2O5 + Bi2O3) * 100 is more than or equal to 30 and less than or equal to 75. Tests show that when the thickness of the glass is 10 mm, the refractive index of the glass is 2.09-2.35, and the transmittance of the glass with the wavelength lambda 70 smaller than 450 nm is 82.4%-96.8%. The problems that in the prior art, high-refractive-index glass is low in refractive index and light transmittance and low in performance and cost ratio, and the increasingly-developed visual experience and development requirements of head-mounted displays cannot be met are solved.

The invention relates to the technical field of photoelectric devices, in particular to a perovskite thin film and a preparation method thereof, a perovskite precursor solution, a photoelectric device and an electric device. According to the perovskite thin film provided by the invention, the perovskite thin film comprises an ABX3 type perovskite material and a cross-linked polymer, and the cross-linked polymer is a polymer obtained by cross-linking an ether-containing amide monomer. The cross-linked polymer contained in the perovskite thin film provided by the invention can effectively passivate surface defects of the perovskite thin film so as to improve thermal stability and photoelectric properties of the perovskite thin film.

The invention relates to a softening-resistant low-temperature soldering tin H-grade enameled wire and a production process thereof.The enameled wire is composed of a wire and a coating, the coating comprises a bottom coating and a surface coating, and the bottom coating is obtained by coating H-grade heat-resistant polyurethane paint with the solid content of 25%-30% and the viscosity of DIN 4 # 20-30 s; the surface coating is obtained by coating self-lubricating polyurethane paint with the solid content of 23%-28% and the viscosity DIN4 # of 15-25 s. The production process comprises the steps of raw material selection, wire drawing, annealing, cooling, cleaning, painting, curing, cooling and take-up.

The invention discloses a heat dissipation module and display equipment, the heat dissipation module comprises a plurality of radiators, a plurality of heat conduction pipes, a heat dissipation main body and a first support, a first cavity is formed in the heat dissipation main body, a second cavity is formed in each heat conduction pipe, and a valve is arranged at the joint of the heat dissipation main body and each heat conduction pipe; the first cavity and the second cavity are communicated or disconnected through a valve; the first cavity is filled with cooling liquid; a controller is arranged in the heat dissipation main body, a sensor is arranged in each heat conduction pipe, the sensors are electrically connected with the controller, the controller is electrically connected with each valve, and when the sensors detect that the heat conduction pipes reach a first preset state, the controller controls the valves in the corresponding heat conduction pipes to be opened; and when the sensor detects that the heat conduction pipe reaches a second preset state, the controller controls the valve in the corresponding heat conduction pipe to be closed. In this way, targeted cooling is formed on the local high-temperature area of the heat dissipation module, so that the heat dissipation stability of the heat dissipation module is guaranteed.

The invention discloses a polyhydroxyalkanoate composition and a preparation method thereof. The polyhydroxyalkanoate composition comprises the following components in parts by mass: 100 parts of polyhydroxyalkanoate; 0.5 to 5 parts of unsaturated D-polylactic acid; 0.5 to 5 parts of poly (L-lactic acid); the preparation method comprises the following steps: S1, carrying out melt blending on the polyhydroxyalkanoate and the unsaturated D-polylactic acid, and enabling the polyhydroxyalkanoate and the unsaturated D-polylactic acid to fully react, so as to obtain an intermediate product; and S2, carrying out melt blending on the intermediate product obtained in the step S1, poly-L-lactic acid and an ester exchange inhibitor to finally obtain the polyhydroxyalkanoate composition with excellent thermal stability, high melt strength and high crystallization speed.

The invention relates to a cobalt-free ultra-high nickel positive electrode material and a preparation method and application thereof, the preparation method comprises the following steps: ball-milling and mixing a nickel source, a lithium source and a dopant to obtain powder, and drying and sintering the obtained powder to obtain the cobalt-free ultra-high nickel positive electrode material, the doping agent comprises an aluminum-containing doping agent and a manganese-containing doping agent; the nickel source, the lithium source and the doping agent are mixed according to the molar ratio of the nickel element to the lithium element to the total doping element being (0.90-0.98): (1.03-1.06): (0.02-0.10). The Al and Mn elements are uniformly doped in the positive electrode material substrate through a solid-phase reaction method, the material performance is synergistically improved by utilizing the unique action mechanism of the doped elements, the electrochemical performance is synergistically improved on the premise of not depending on the cobalt element, and high initial discharge capacity, cycling stability and rate capability are kept in a wide voltage interval; and excellent capacity retention capability is shown in a wide multiplying power range.

The utility model provides an oil-resistant high-precision embedded thermal resistor, which belongs to the technical field of embedded thermal resistors, and comprises a reference end and a measuring end, the measuring end comprises a pipe sleeve head and two resistor elements arranged in the pipe sleeve head, the upper part of the pipe sleeve head is welded with an armored lead wire through laser, and the armored lead wire is connected with the reference end and the measuring end. The armored lead is sleeved with a silica gel heat shrink tube or a polytetrafluoroethylene tube, and a shielding lead is arranged between the armored lead and the reference end. According to the embedded thermal resistor, double resistor elements are adopted, so that the redundancy of a product is increased, cross validation can be realized, the measurement error is reduced, meanwhile, the lead directly connected with the measurement end is an armored lead, and a silica gel heat shrink tube or a polytetrafluoroethylene tube is sleeved on the lead, so that the oil resistance of the embedded thermal resistor is greatly improved, and the service life of the embedded thermal resistor is prolonged. In addition, environmental interference can be inhibited, thermal stability can be maintained, the service life can be prolonged, and the effective precision under actual working conditions is remarkably improved, especially in high-electromagnetic-interference, severe-temperature-change or corrosive environments.

This invention discloses a waterproof and breathable automotive signal light assembly and its sealing process, relating to the field of automotive signal light technology. It includes: a signal light body with LED beads installed inside; a signal light cover installed on one side of the signal light body, sealed together using a sealing process; and an exhaust mechanism located on one side of the heat dissipation mechanism for balancing the internal and external air pressure of the signal light cover. This device achieves dynamic pressure balance and thermal management based on the principle of thermally induced pressure change and unidirectional fluid control: when the LED operates, causing an increase in internal temperature and pressure, the thermally expanded gas overcomes the pre-tightening force of the first elastic element, opening the exhaust one-way valve core and entering the diversion chamber through the exhaust channel. At this time, the intake one-way valve is normally closed, and the high-pressure gas is only discharged through the top connecting pipe to prevent the sealing structure from deforming under pressure; while achieving pressure balance, it prevents direct intrusion of humid air.

The preparation method comprises the following steps: placing dicarboxyl monomers in a 20-50wt% acidic solvent, keeping the temperature at 75-95 DEG C for 1-2 hours, then adding hydrazinium with the same molar weight as the dicarboxyl monomers, keeping the temperature at 75-95 DEG C for 3-4 hours, then heating to 100-120 DEG C, keeping the temperature for 1-2 hours, then heating to 140-160 DEG C, keeping the temperature for 1-2 hours to obtain slurry, and drying the slurry to obtain the self-sulfonated polyaryloxadiazole base membrane which is used for preparing the self-sulfonated polyaryloxadiazole base membrane of the self-sulfonated polyaryloxadiazole base membrane of the self-sulfonated polyaryloxadiazole base membrane of the self-sulfonated polyaryloxadiazole base membrane. And carrying out coagulating bath forming, alkali washing, water washing, drying and heat setting on the slurry to obtain the polyaryloxadiazole. Through the design, the preparation of the self-sulfonated polyaryloxadiazole with low cost is realized, the transmittance is high, and the thickness limit is small.

The thermoplastic resin composition of the present invention comprises: about 100 parts by weight of polyester resin; about 5 to 30 parts by weight of polycarbonate resin; about 50 to 150 parts by weight of flat glass fiber; about 2 to 10 parts by weight of epoxy-modified olefin copolymer; and about 2 to 10 parts by weight of maleic anhydride-modified ethylene-propylene-diene monomer terpolymer, wherein the weight ratio of the epoxy-modified olefin copolymer to the maleic anhydride-modified ethylene-propylene-diene monomer terpolymer is about 1:0.5 to 1:2. The thermoplastic resin composition exhibits excellent metal adhesion, impact resistance, rigidity, and a balance of thermal stability and physical properties.

The utility model discloses a stackable battery pack structure which comprises a plurality of single battery packs stacked up and down, each single battery pack consists of a battery pack ring frame and a liquid cooling plate mounted at the bottom of the battery pack ring frame, and a battery core group is placed in a frame cavity of the battery pack ring frame. A frame upper edge ring is arranged on the top ring edge of the outer side of the battery pack ring frame, a frame lower edge ring is arranged on the bottom ring edge of the outer side of the battery pack ring frame, every two adjacent single battery packs are fixedly installed together through the frame upper edge ring and the frame lower edge ring, a liquid cooling cavity is formed in the liquid cooling plate, and the liquid cooling cavity is communicated with the liquid cooling cavity. A liquid inlet and outlet cavity hole is formed in the cavity wall of the liquid cooling cavity, and a liquid inlet and outlet pipe is installed on the outer side of the liquid inlet and outlet cavity hole. The battery pack has the beneficial effects that the space utilization rate is high, the thermal stability is strong, the structure is simplified, the integrated design of the battery pack is facilitated, the production cost is reduced, and the safety is improved.

The invention provides a thermosetting sheath material for a nuclear power plant cable with a life span of 80 years. The thermosetting sheath material comprises the following components by weight: 100 parts of EVA; 20-30 parts of maleic anhydride grafted poly-4-methyl-1-pentene; 3-5 parts of a vulcanizing agent; 1-3 parts of a vulcanizing accelerator; 2-4 parts of an activator; 4-8 parts of a softener; 5-10 parts of an antioxidant; 2-6 parts of a reinforcing agent; 150-180 parts of an inorganic flame retardant; and 1-2 parts of a light stabilizer. The thermosetting sheath material for a nuclear power plant cable with a life span of 80 years of the invention improves the heat decomposition resistance and chemical resistance of EVA as a main material by combining EVA and maleic anhydride grafted poly-4-methyl-1-pentene, thereby improving its anti-aging ability. At the same time, the toughness inside the thermosetting sheath material can be significantly improved, thereby improving its strength in a harsh environment for a long time.

The application discloses a cyclic olefin copolymer-benzene tricyanide composite dielectric film and a preparation method thereof, and aims to solve the problems of low energy storage density and insufficient breakdown strength of pure cyclic olefin copolymer at high temperature. The composite dielectric film comprises cyclic olefin copolymer and benzene tricyanide dispersed in the cyclic olefin copolymer, the added amount of the benzene tricyanide is 0.05wt%-0.3wt%, the preparation method is that the cyclic olefin copolymer and the benzene tricyanide are stirred and dissolved in an organic solvent and then are left to stand and defoam to obtain a casting solution, and the casting solution is prepared through flow casting and vacuum drying. The strong electron-withdrawing cyano group of the benzene tricyanide molecule constructs a deep electron trap in the free volume of the cyclic olefin copolymer. At a high temperature of 150 DEG C and a high electric field, the deep trap effectively captures the excited free electrons, inhibits the long-range migration of carriers and the conduction loss, and improves the high-temperature breakdown field strength, the discharge energy density and the service reliability of the composite dielectric film.

The invention belongs to the technical field of high-temperature superconducting, and discloses a cooling pipeline system, which comprises an input unit, an internal cooling unit, a circumferential cooling unit, an end part cooling unit and an output unit, and is characterized in that the internal cooling unit comprises a plurality of coil cooling pipes which are arranged in parallel so as to realize uniform cooling of the interior of a high-temperature superconducting magnet. The circumferential cooling unit comprises a first circumferential cooling structure and a second circumferential cooling structure which are arranged in a central symmetry mode so that the high-temperature superconducting magnet can be evenly cooled in the circumferential direction of the high-temperature superconducting magnet. The end cooling unit comprises a first end cooling structure and a second end cooling structure which are arranged at the two ends of the high-temperature superconducting magnet respectively so as to cool the two ends of the high-temperature superconducting magnet. According to the cooling pipeline system, the interior of the high-temperature superconducting magnet can be uniformly cooled, the circumferential direction and the two ends of the high-temperature superconducting magnet can also be cooled, the high-temperature superconducting magnet is separated from an external temperature area, heat leakage of the magnet is effectively avoided, and a stable low-temperature environment is provided for the high-temperature superconducting magnet.

The invention discloses a heating device for a fresh air system, and relates to the technical field of fresh air, the heating device for the fresh air system comprises a fresh air fan, one side of the fresh air fan is fixedly connected with an outlet pipe, one end of the outlet pipe is fixedly connected with a connecting pipe A, and one side of the connecting pipe A is provided with a uniform heating mechanism; by arranging the uniform heating mechanism, when air passes through the multiple heating grooves in the inner wall of the heat conduction cylinder, due to the fact that the area of the inner walls of the heating grooves is large and the number of the inner walls of the heating grooves is large, the air is fully heated and then exhausted, the air heating effect is completed, and more uniform heating and air circulation of the air are completed through the heating grooves in the closed heat conduction cylinder.

The application relates to the technical field of electric wire and cable, and provides a high-wear-resistance electric wire and cable and a preparation method thereof.The high-wear-resistance electric wire and cable comprises an inner core, a stress dispersion ring, a twisted constraint layer, a heat conduction layer, a diffusion layer and a wear-resistant layer which are coaxially sleeved from inside to outside, the wear-resistant layer comprises elastic connecting belts and flexible scales, the flexible scales are cross-connected to form a grid structure through the elastic connecting belts, and the wear-resistant layer is wrapped on the outside of the diffusion layer; and the inner core comprises a conductor core, an elastic porous filling layer and anti-torsion protrusions, and the elastic porous filling layer is filled between the conductor cores and on the outside. In the application, the wedge-shaped matching of the anti-torsion protrusions of the inner core and the meshing grooves of the stress dispersion ring, the elastic energy absorption of the spiral buffer strips, the structural reinforcement of the aramid belts of the twisted constraint layer, and the grid deformation matching of the elastic connecting belts and the flexible scales of the wear-resistant layer are combined, so that the torsional stress is gradedly dissipated, the wear damage is dispersed and buffered, the torsional life of the electric cable is greatly prolonged, and the surface wear resistance of the electric cable is greatly improved.

The utility model discloses a dustproof box-type SVG device, which comprises a cabinet body, an SVG main body is fixedly arranged in the cabinet body, an inner isolation cover is fixedly arranged in the cabinet body, hollow heat-conducting plates which are arranged at equal intervals are inserted into the top of the cabinet body, the bottom ends of the hollow heat-conducting plates are inserted into the inner isolation cover, and the inner isolation cover is fixedly arranged in the cabinet body. And a first fan is mounted on the back surface of the inner isolation cover. According to the utility model, the inner isolation cover is matched with the first fan to realize air internal circulation in the space inside the cabinet body, the hollow heat-conducting plate exports heat and realizes heat dissipation in the circulation process, and under the action of the wind-direction-variable dustproof mechanism, the wind direction is variable, dust is prevented from blocking the dustproof cover, and the service life of the cabinet body is prolonged. Therefore, the device can achieve the effective isolation and dust prevention of the working space of the SVG main body, guarantees the stable heat dissipation effect of the device, and reduces the manual cleaning and maintenance cost.

This utility model relates to a descending furnace, comprising a frame, furnace body, heating components, insulation cover, rotary lifting mechanism, sealing mechanism, crucible, and laser. The furnace body includes a furnace bottom, furnace cylinder, and furnace cover. The furnace cylinder and insulation cover are made of heat-resistant transparent optical material. The sealing mechanism is installed between a through hole and a drive shaft, and includes a flexible section configured to shorten as the drive shaft rises and extend as the drive shaft descends. An evacuation port is provided on the sealing mechanism. By employing an insulation cover and furnace cylinder made of heat-resistant transparent optical material, real-time visual monitoring of the entire crystal growth process is achieved. The sealing mechanism maintains a stable vacuum environment in the heating chamber, effectively suppressing heat loss caused by thermal radiation and convection. The laser beam promotes the nucleation and directional growth of crystal materials through light-induced effects, and simultaneously enables in-situ observation and diagnosis of solid-liquid interface morphology, interface fluctuations, and internal crystal defects.

The invention discloses a large laser gyroscope, which comprises a working platform, and a radio frequency laser, a plurality of angular cavities and a plurality of light path pipes supported on the working platform, the plurality of angular cavities and the plurality of light path pipes are sequentially and alternately connected end to end to form an annular cavity, the radio frequency laser is arranged on one of the light path pipes and is used for generating laser in the annular cavity, and the light path pipes are arranged on the other of the light path pipes. A reflector is arranged on the angular cavity and is used for reflecting the laser in the annular cavity, so that the laser forms annular resonant laser; the radio frequency laser comprises a closed gain tube and an electrode assembly, the electrode assembly comprises a first electrode connected with a radio frequency power supply and a grounded second electrode, working gas is arranged in the gain tube, and the first electrode and the second electrode are both of an annular structure and wrap the gain tube. The first electrode and the second electrode of the electrode assembly are provided with a discharge gap along the axial direction of the gain tube. The method has the advantages of low cost, high precision, high thermal stability and the like.

The invention relates to an organic compound, a mixture, a composition, a light-emitting device and a display panel. The chemical structural formula of the organic compound is shown as a formula M: # imgabs0 # M. As the organic compound has good carrier transport and charge balance adjustment performance and high thermal stability, the organic compound can be applied to a light-emitting device as a light-emitting auxiliary material, and is beneficial to improving the light-emitting efficiency of the light-emitting device and prolonging the service life of the light-emitting device.

The invention provides a screw vacuum pump, and belongs to the technical field of pump bodies. The screw vacuum pump solves the problem that in an existing screw vacuum pump, the length of a screw needs to be increased in order to achieve high air exhaust efficiency. The screw vacuum pump comprises a pump body, two rotors are arranged in the pump body, and the screw vacuum pump is characterized in that each rotor is provided with K spiral turns, the total length of each rotor is L, the screw pitches of the rotors from the air inlet end to the air outlet end are P1-Pi in sequence, the two rotors are respectively a left-handed rotor and a right-handed rotor, and the two rotors are meshed with each other, wherein the rotating angle of one rotor end face molded line around the rotating center is a central angle theta, the rotor has a spiral line coordinate equation, and the peripheral surface of the rotor is formed by rotating each section of curve on the end face molded line along a spiral line. According to the screw vacuum pump, the screw pitch of the rotor is adjusted according to specific requirements, the optimal screw pitch is achieved, and therefore the length of the rotor can be reduced while high air exhaust efficiency can be guaranteed.

The present invention provides a cooling system for a coupled linear accelerator, comprising a coupling component and two accelerators, wherein the coupling component couples the two accelerators to form a coupled linear accelerator, wherein cooling channels for cooling medium to flow are arranged in the coupling component and the accelerator; the cooling channels are connected to an external cooling medium conveying device; according to the characteristics of the coupled linear accelerator, the present invention cools the coupling component and the accelerator separately, so as to control the temperature rise, deformation and frequency drift of the coupled linear accelerator within a controllable range, thereby ensuring the operation stability of the coupled linear accelerator.

The invention specifically discloses an electrolyte and a lithium ion battery. The electrolyte comprises an electrolyte for first injection and an electrolyte for second injection, the first injection electrolyte comprises a first solvent, a first additive and a first lithium salt; the first solvent comprises dimethyl carbonate, the first additive comprises vinylene carbonate and a composite additive, and the composite additive comprises at least one of fluoroethylene carbonate, ethylene sulfate and methylene methanedisulphonate; the mass ratio of the dimethyl carbonate is 45%-50%; the secondary injection electrolyte comprises a second solvent, a second additive and a second lithium salt; the second solvent comprises dimethyl carbonate, and the second additive comprises vinylene carbonate; the mass ratio of the dimethyl carbonate is 45%-50%; the mass ratio of the vinylene carbonate is 15%. The lithium battery has the advantages of high energy density and long cycle performance.

The present invention proposes a safety identification method and device based on industrial control protocols, which belong to the field of industrial control protocols. By installing a checking unit between each execution unit and a straight hole unit, the instructions issued by the main control unit can be identified to avoid the execution unit from operating incorrectly due to an erroneous instruction on the main control unit, and to avoid losses. By electrically connecting a backup control unit with the checking unit, when the checking unit identifies that the instruction of the main control unit is erroneous, the checking unit can urgently call the instructions on the backup control unit to continue to control the execution unit to avoid shutdown of the execution unit. By installing a cooling unit on a machine body and automatically adjusting according to the actual stability in the machine body, the operation efficiency of each unit in the machine body can be improved, and energy consumption can be saved to a certain extent.