1067 results about "Cold area" patented technology

The invention discloses a hydrogen fuel cell vehicle ultralow temperature cold start thermal management system, and relates to the technical field of hydrogen fuel cell vehicle thermal management, the hydrogen fuel cell vehicle ultralow temperature cold start thermal management system comprises a thermal management platform, the thermal management platform is in communication connection with the following modules: a temperature monitoring and predicting module, and the temperature prediction module is used for monitoring the temperature of key parts in the hydrogen fuel cell by using the temperature sensor and predicting the change trend of the temperature in the fuel cell in combination with the temperature prediction model. By utilizing the high-precision temperature sensor and the long-short-term memory network model, the internal temperature change trend of the fuel cell is pre-judged in advance, the heating power is dynamically adjusted, it is ensured that the temperature of the cell is rapidly increased to the proper working temperature in the ultralow-temperature environment, starting difficulty caused by local supercooling is avoided, the low-temperature starting time is remarkably shortened, and the starting efficiency is improved. The reliability and the stability of the system in an extreme environment are improved, and the normal operation of the hydrogen fuel cell vehicle in a cold region is guaranteed.

The invention discloses a fan blade icing monitoring system and method, and relates to the technical field of wind power generation, and the system collects temperature, humidity and vibration signals in real time through a multi-sensor module installed on a fan blade, fuses multi-parameter data through an edge calculation unit, and calculates a blade icing risk factor # imgabs0 #. The risk factors are calculated by adopting a dynamic weighting model, and the icing state of the blade is accurately evaluated in combination with normalized characteristic values # imgabs1 #, # imgabs2 # and # imgabs3 #. And when the risk factor exceeds a set threshold value, the system triggers an alarm and transmits data to the cloud through the wireless communication module. The cloud platform predicts the future icing risk based on a long-short term memory (LSTM) neural network model in combination with historical data and real-time monitoring data, the accuracy and real-time performance of icing monitoring are improved, the method is suitable for operation in cold regions and high-altitude wind fields, and reliable guarantee is provided for safe and efficient operation of fans.

The invention relates to the related technical field of fabricated building outer walls, and discloses a severe cold area fabricated building outer wall based on a thermoelectric power generation technology, which comprises a fabricated wall body module, a thermoelectric power generation module, a heat collection structure module, a circuit connection module, an energy management module and a data monitoring module, the fabricated wall body module is a solid prefabricated concrete shear wall composed of an inner leaf wall plate, a heat preservation layer and an outer leaf wall plate, the heat collection structure module is fixedly installed on the outer wall of the fabricated wall body module, and the heat collection structure module comprises a heat absorption plate, a glass cover plate and a shell; according to the core component, the nickel-chromium alloy and the constantan alloy which are high in stability are directly welded for power generation, other technologies do not need to be combined, the core component can be directly applied to the building field, and under the condition that the power generation efficiency is guaranteed, the construction requirement of the building field is met as much as possible; and a brand new thought is developed for the energy-saving design of the fabricated building wall.

The invention discloses a combined test method and device for a temperature field and a stress field of a tunnel in a severe cold region, and belongs to the field of tunnel engineering. The tunnel comprises a primary support and a secondary lining, the system comprises a data acquisition instrument, and a surface strain gauge, a thermometer, a temperature measurement beam, a heat conductivity probe, a wind speed sensor and a meteorological sensor which are respectively in communication connection with the data acquisition instrument, and the data acquisition instrument is arranged at the haunch of the tunnel; the surface strain gauge is arranged on the lining surface of the second lining; the thermometer is arranged on the inner side surface of the second lining; the temperature measuring beam is arranged in the primary support and the surrounding rock; the thermal conductivity probe is inserted into surrounding rock; the wind speed sensors and the meteorological sensors are arranged on second linings on the left side and the right side in the tunnel. According to the invention, the temperature field and the stress field of the surrounding rock lining can be monitored, the temperature measuring beam and the surface strain gauge are adopted to monitor the range of the freeze-thaw ring and the change of the frost heaving force, and data support is provided for researching the influence of the thermal-mechanical coupling effect on the cold region tunnel and the dynamic evolution of the tunnel engineering vulnerability.

The invention discloses a drainage plate for an unsaturated soil roadbed in a cold region. The drainage plate comprises a hydrophobic layer, a drainage layer and an anti-freezing layer which are sequentially arranged in parallel, the hydrophobic layer is made of a hydrophobic material; the drainage layer comprises at least two layers of capillary structures and water-absorbing fibers filled between the capillary structures, the outer layer is a vertical honeycomb tube, the inner layer is a horizontal honeycomb tube, and the radius is gradually reduced from outside to inside; the capillary tube structure adsorbs pore water in unsaturated soil through capillary action, and the water-absorbing fibers drive water to be discharged out of the roadbed through water content difference; and the anti-freezing layer is made of a low-temperature-resistant polymeric material. According to the drainage plate, through the capillary action of the middle three-dimensional drainage layer, pore water dispersed in unsaturated soil is actively adsorbed, water is directionally discharged in combination with gravity, and the problem that a traditional drainage pipe is low in efficiency in the unsaturated soil is solved; meanwhile, through double-layer protection of the hydrophobic layer and the anti-freezing layer, a moisture seepage path is blocked, soil particles are prevented from invading, and a drainage channel is prevented from being blocked.

The invention discloses an analogue simulation system for operation of a ground source heat pump and a gas boiler in a severe cold area. The analogue simulation system comprises a heat supply correction model building module, a ground source / gas heat supply estimation module, a heat supply dispatching distribution module and a correction model optimization module. According to historical operation data of a ground source heat pump subsystem, heat supply correction models associated with soil geology and environmental climate are constructed based on a single variable principle, a heat supply amount estimated value of the ground source heat pump subsystem is dynamically corrected, heat supply amount of a gas boiler subsystem and heat load required by a building group are estimated, heat supply output of the two subsystems is intelligently distributed, and heat supply efficiency is improved. And the heat supply amount correction model is optimized through the actual heat supply amount deviation. The method can effectively overcome the problem of ground source heat pump heat supply amount deviation caused by soil heat unbalance and climate fluctuation in a severe cold area, further improves the energy efficiency estimation precision of a heat supply system, facilitates optimization of a scheduling strategy, has dynamic compensation and model self-evolution capabilities, and can adapt to complex environmental changes.

The invention relates to the technical field of snow melting disaster early warning, in particular to a snow surface rain disaster identification method based on a high and cold mountainous area and a related product, and the method comprises the steps: constructing a snow surface rain disaster single-point identification rule capable of being physically explained by using meteorological observation data and remote sensing inversion data of a small amount of weather stations in the high and cold mountainous area; the method is advantaged in that classification is carried out without depending on a black box model, precision and interpretability of single-point snow surface rain event discrimination are improved, regional popularization is carried out through dynamic downscaling simulation of a regional climate mode WRF coupling land surface process model Noah-MP, a point-surface fusion snow surface rain disaster discrimination and identification system is constructed, and the method is advantaged in that the method is simple and convenient to operate. The method is suitable for identifying snow rain disasters in complex terrain areas with high and cold areas, high altitude, large gradient, lack of data, even no data and the like, and solves the technical problems of insufficient snow rain disaster space identification capability and low precision caused by sparse observation data in the high and cold mountainous areas in the prior art.

The invention relates to the field of data storage, in particular to a storage and calculation separation multi-dimensional data block indexing method based on adaptive learning. Comprising the steps of receiving original multi-dimensional data and a query load, and outputting a low-dimensional key set through a first model; the low-dimensional key set and the historical query load generate a partitioning scheme through a second model, and the partitioning scheme performs physical recombination on the original multi-dimensional data to output a plurality of physical data blocks; constructing a learning type index through the physical data blocks and the corresponding partitioning schemes; identifying hot spot and cold spot areas through the query frequency of each node of the learning type index and the real-time query load continuous monitoring index; when the access mode changes, adjusting the index structure, and outputting a self-adaptive index; and quickly positioning and reading the target data block through the self-adaptive index to complete access. According to the method, the index of adaptive learning is provided, and the index structure and the physical data layout are adjusted, so that the query accuracy and efficiency in a complex scene are improved, and the data storage overhead is reduced.

The invention provides a temperature control type anti-frost-heaving retaining wall structure and a design method thereof, and belongs to the technical field of infrastructure retaining engineering in cold regions, the temperature control type anti-frost-heaving retaining wall structure comprises a retaining wall body, a ground temperature energy conversion system and an intelligent control system, and the ground temperature energy conversion system is connected with the retaining wall body; the ground temperature energy conversion system is used for absorbing ground temperature energy, converting a gas-state heating medium from a low-pressure state into a high-pressure state, adjusting the flow of a liquid-state heating medium, reducing the pressure of the heating medium and dissipating the ground temperature energy into the retaining wall body, and the intelligent control system is electrically connected with the ground temperature energy conversion system; the controller is used for monitoring the temperature of filling soil on one side of the retaining wall body and controlling the ground temperature energy conversion system to operate according to the filling soil temperature so as to control the retaining wall body temperature and filling soil heat. The technical problems that the retaining wall frost heaving disease control difficulty is large, and the frost damage prevention and control effect is poor are solved, and the technical effects that the retaining wall and the filling temperature can be controlled, frost heaving disease control is easy, and the frost damage prevention and control effect is good are achieved.

The invention relates to a ventilation system for a high-voltage frequency converter room in severe cold areas and a working method of the ventilation system. The ventilation system comprises a fresh air handling unit, a fresh air pipeline, an air supply pipeline, an air inlet pipeline, an air return pipeline, an inner exhaust pipeline and an outer exhaust pipeline. The fresh air handling unit is composed of a fresh air section, a first heating section, an air return section, a second heating section, a fan section and an air supply section. A fresh air electric regulating valve is arranged on the fresh air pipeline; the first heating section and the second heating section are provided with heaters, and the fan section is provided with a fan; an air return electric regulating valve is arranged on the air return pipeline; a natural air inlet electric valve is arranged on the air inlet pipeline; an inner exhaust electric control valve is arranged on the inner exhaust pipeline; an external exhaust air electric regulating valve is arranged on the external exhaust pipeline; the ventilation system can effectively solve the problems existing in temperature control of the high-voltage frequency converter chamber in severe cold and cold areas, and is simple and compact in structure, convenient to construct and use, suitable for various working conditions and climate conditions and remarkable in energy conservation and emission reduction effect.

The invention discloses an alpine meadow aboveground biomass monitoring method based on PROSAIL-BP, and belongs to the field of ecological remote sensing information processing. In order to overcome the defect that samples in the alpine region are insufficient and have high precision and high reliability, the method comprises the steps that an alpine meadow mask, remote sensing images and field biomass data in a target region are obtained, the remote sensing images are spliced, the wave band reflectivity is normalized, and the grassland region reflectivity is reserved in combination with mask cutting; predefining a PROSAIL model matched with the region features; performing Sobol global sensitivity analysis to obtain a first-order sensitivity index and a total-order sensitivity index of the parameter; screening a key wave band and four high-sensitivity parameters; uniformly sampling to generate a parameter group, simulating a hyperspectrum through PROSAIL, extracting the reflectivity of a key wave band, and constructing a data set by multiplying a leaf area index by a dry matter content as a target variable; and training a three-layer BP neural network, and processing the reflectivity output pixel biomass of the remote sensing key wave band. The method is applied to a remote sensing information processing system and has high precision and high reliability.

The invention provides a high and cold area strip mine rock explosibility grading method, and relates to the technical field of mine rock explosibility grading. According to the method, field experiments, numerical simulation and an intelligent algorithm are combined, and the influence of climate and geological conditions of a high and cold area on rock mass explosibility is considered; the method comprises the following steps: establishing an explosibility index system comprising cold region climate and geological conditions, rock physical and mechanical properties, explosive blasting parameters and a blasting process, determining a fuzzy membership degree, a relative weight and a comprehensive weight of each evaluation index by using a fuzzy evaluation method and adopting a trapezoidal membership function, and proposing an explosibility grading method considering the cold region influence.

The invention relates to a cold-resistant medium-voltage power cable applied to the field of cables, and the cable comprises a cable body, the outer end of the cable body is slidably sleeved with a bending protection sleeve, and through the cooperation of the bending protection sleeve, a chuck, a flexible electric heating patch and a bending induction assembly, on one hand, the bending difficulty of the cable body during laying can be reduced; on one hand, damage to the cable body caused by excessive bending is avoided, the laying efficiency and safety of the cable body in a cold region are improved, on the other hand, the laying position at the bending position can be heated, the flexibility of the cable body during laying can be improved, damage to the inner wire core of the cable body is reduced, and the service life of the cable body is prolonged. In addition, heat preservation protection can be carried out on the bending laying position of the cable body in the subsequent continuous application process of the cable body, the degree of influence of low temperature on the bending position is reduced, the risk of hardening or even cracking of the bending position is reduced, the durability of the cable body after laying is improved, and the safety and stability of the cable body in the power transmission process are effectively guaranteed.

The invention discloses an alpine region charging pile micro-electric heating assembly system and a working method, and the system comprises an alpine region charging pile electrical box which is internally provided with a plurality of fixed micro-electric heating units and temperature sensors in a discrete manner. The plurality of fixed micro-electric heating units are distributed near a plurality of electrical elements needing special anti-freezing protection in an electrical box of the charging pile in the alpine region; and the risk problems of cracking of various elements of the charging pile, inflexible action part of the relay, performance reduction and the like in an extremely low temperature environment are effectively relieved.

The invention relates to concrete for a non-structural silicon-aluminum cementing material as well as a preparation method and application of the concrete. The silicon-aluminum cementing material concrete is prepared from the following components in percentage by mass: 10%-25% of a silicon-aluminum cementing material cementing component, 0.5%-1.3% of an auxiliary exciting agent, 36%-50% of coarse aggregate, 25%-40% of fine aggregate, 5.0%-12.5% of water and 0%-0.6% of calcium lignosulphonate. Compared with Portland cement concrete, the silicon-aluminum cementing material concrete provided by the invention has more excellent freeze-thaw cycle resistance, and can be suitable for preparation of concrete buildings in severe cold areas.

The invention relates to a cold region tunnel energy-saving heat-preservation anti-freezing system and a control method, the cold region tunnel energy-saving heat-preservation anti-freezing system comprises an energy storage heating module, a temperature monitoring module, an air circulation module, a drainage anti-freezing module, a lining and an off-wall heat-preservation layer, the lining and the off-wall heat-preservation layer form an air heat-preservation cavity, and the air heat-preservation cavity communicates with the energy storage heating module; the energy storage heating module is used for generating and storing heat and providing a heat source for air in the air heat preservation cavity and the air circulation module, and the temperature monitoring module is used for collecting and analyzing the temperature of air in the air heat preservation cavity and the temperature of air in the air circulation module and the inner wall of the air heat preservation cavity. According to the embodiment of the invention, a stable heat preservation and anti-freezing effect can be provided in a negative temperature environment for a long time, the operation cost is low, safety and reliability are realized, the problems of high energy consumption, potential safety hazards and the like in the prior art are solved, the applicability is wide, and the practicability is high. And the method has good practical value and economic benefit.

The invention relates to the technical field of concrete, and particularly discloses high-strength low-heat-conductivity self-compacting concrete and a preparation method thereof. The high-strength low-heat-conductivity self-compacting concrete can maintain ideal strength performance while improving the heat insulation performance, so that the high-strength low-heat-conductivity self-compacting concrete is more suitable for being applied to occasions sensitive to temperature, such as underground spaces and external walls in severe cold areas. In addition, the ceramsite provided by the invention also provides a new consumption way for the vanadium slag, and can effectively realize recycling of wastes.

The invention discloses a vapor chamber and a manufacturing method thereof. The vapor chamber comprises an upper cover, a lower cover and a metal foil, the lower cover is connected with the upper cover, a containing cavity is formed between the lower cover and the upper cover, and a cooling medium is contained in the containing cavity; the metal foil is arranged in the containing cavity, a condensation cavity is formed between the metal foil and the upper cover, an evaporation cavity is formed between the metal foil and the lower cover, and a plurality of capillary holes are distributed in the metal foil and communicated with the condensation cavity and the evaporation cavity. According to the vapor chamber, the metal foil is arranged between the upper cover and the lower cover, backflow of a liquefied cold area medium in the condensation cavity into the evaporation cavity is achieved through the capillary holes formed in the metal foil, and the overall thickness of the whole vapor chamber can be set to be smaller due to the arrangement of the metal foil.

The invention discloses a numerical analysis method for low-energy-consumption transformation of existing buildings in cold regions, and belongs to the technical field of low-energy-consumption transformation of buildings. The method solves the problem that the prior art lacks a unified technical standard and evaluation method, collects basic information and energy consumption data of an existing building in a cold region, establishes a building model by adopting Design Builder simulation software, simulates energy consumption of a heating and lighting system to which the model belongs, compares a simulation result with actual energy consumption data, and determines the energy consumption of the existing building in the cold region. The accuracy of a simulation result is analyzed; the energy consumption performance of the existing building is evaluated by comparing an actually measured energy consumption index with a simulation result, and a targeted optimization strategy is constructed according to the simulation result and comparative analysis; through the steps, numerical analysis is realized, and specific and quantifiable low-energy-consumption reconstruction suggestions can be provided for the existing buildings in the cold region, so that the energy efficiency of the buildings is improved, the energy consumption is reduced, and meanwhile, the comfort of the indoor environment is kept.

The invention relates to the technical field of stamping dies, in particular to a cooling system of a stamping die and the stamping die, the cooling system comprises a cooling liquid tank, and further comprises a water pump mounted in the cooling liquid tank; the fixed pipe is fixedly communicated with the side wall of the cooling liquid tank; the first connecting pipe is fixedly communicated between the water pump and the fixed pipe; the telescopic spraying assembly is installed in the fixing pipe and used for spraying cooling liquid on the surfaces of a lower die and an upper die of the stamping die body when the stamping die body conducts stamping part transposition; the telescopic spraying assembly further comprises an airflow driving assembly, and when the telescopic spraying assembly is started, the airflow driving assembly is started synchronously. According to the device, through the arrangement of the telescopic spraying assembly, an atomized cold area is driven to diffuse to the periphery, the flowing and evaporation effect of atomized cooling liquid can be accelerated, the cooling effect of the cooling liquid on a mold is improved, and the cooling efficiency is improved.

The invention relates to the technical field of alpine region radar temperature control, in particular to an alpine region trailer radar constant temperature method and system based on multi-module unified temperature control, and the method comprises the following steps: constructing a multi-module constant temperature independent scheduling model through a classifier; analyzing temperature dynamic laws of the radar host, the control cabinet and the protective square cabin; according to the temperature dynamic rule, predicting the duration when the temperatures of the radar host, the control cabinet and the protective square cabin exceed a working condition temperature threshold; and endowing the constant-temperature independent scheduling model with the duration when the temperatures of the radar host, the control cabinet and the protective square cabin exceed the working condition temperature threshold value as an output weight to obtain a multi-module constant-temperature unified scheduling model. According to the invention, a multi-module constant-temperature unified scheduling model is constructed, unified constant-temperature control of the radar host, the control cabinet and the protective square cabin in the slope radar system is realized, the limitation of non-unified requirements of multiple modules of the slope radar can be broken through in a temperature control priority adaptive mode, and waste of heat resources can be avoided.

The invention belongs to the technical field of corrugated pipes, and discloses a low-temperature-resistant PVC corrugated pipe and a preparation method and application thereof.The low-temperature-resistant PVC corrugated pipe is prepared from, by weight, 90-100 parts of PVC, 20-30 parts of HPVC, 15-25 parts of HNBR, 10-15 parts of functional additive, 8-12 parts of cold-resistant agent, 2-3 parts of antioxidant, 2-4 parts of stabilizer and 1-2 parts of lubricant; wherein the functional additive is obtained by grafting diethyl allyl phosphate and glycidyl methacrylate on an ethylene-vinyl acetate copolymer. In a specific PVC / HPVC / HNBR / functional additive system, through the synergistic effect of interface compatibility optimization, low-temperature resistance complementation and mechanical property balance, the PVC corrugated pipe still has excellent performance in a low-temperature environment, and application and popularization in cold regions or seasonal low-temperature time regions are facilitated.

The invention provides a cold region high dam reservoir discharged water temperature variation degree research method based on a factor analysis method. The method comprises the steps that a water temperature index system is constructed; selecting a research area, obtaining original data, and preprocessing the original data; performing zero-mean standardization on the original data to obtain effective data; and evaluating the variation degree of the discharged water temperature of the reservoir by using a factor analysis method. According to the method, the variation degree of the discharged water temperature of the high dam reservoir in the cold region is evaluated through a factor analysis method, related variables are summarized into several independent common factors, each variable is loaded on one factor as much as possible, the obtained common factors reflect information of original variables more accurately compared with principal components, the data analysis efficiency is improved, and the accuracy of data analysis is improved. And each index weight represents the comprehensive contribution proportion of the factor analysis evaluation score.

The invention provides a phase change-moisture absorption and drainage composite roadbed structure in a seasonal frozen region and an intelligent regulation and control method, and relates to the technical field of roadbed design and renovation. The roadbed structure is characterized in that a plurality of gradient phase change material layers are arranged on the top surface of a roadbed surface layer; the multi-layer gradient phase change material layer, the high moisture absorption and drainage geotextile layer and the drainage pipe system are arranged from top to bottom; the phase change temperature intervals and the phase change latent heat of the phase change layers in the multiple gradient phase change material layers are different; the high moisture absorption and drainage geotextile layer is used for guiding water in the soil body into the drainage pipe system; the drainage pipe system is of a porous structure with the inclination angle within the set angle range and is used for guiding water in the soil into the drainage ditch. And the intelligent regulation and control system is used for dynamically regulating the thermal resistance of each phase change layer and the opening degree of the drainage pipe. According to the invention, the time of the roadbed in a relatively stable physical state can be prolonged, so that the purpose of preventing and treating winter frost heaving, frost boiling and mud rising in a spring melting period and other diseases caused by temperature change of the roadbed in severe cold areas is achieved.

The invention relates to a method for regulating and controlling atomic scale silicon-silicon and aluminum-aluminum interface thermal conductance. The method comprises the following steps: (1) establishing a silicon-silicon and aluminum-aluminum molecular dynamics thermal transport model consisting of a hot area and a cold area; (2) executing molecular dynamics simulation and data processing: (1) determining a dependency relationship of interface thermal conductivity on a torsion angle; (2) determining the influence of the overlapping area of the phonon state density on heat transport in different interface contact states; (3) revealing the internal reason of the interface contact state influencing the interface thermal conductivity; (4) determining the dependency relationship of the system temperature on the interface thermal conductance; and (5) calculating the overlapping area of the phonon state density, the phonon number and the phonon participation rate at different temperatures to reveal the internal mechanism that the system temperature affects the interface thermal conductivity. According to the invention, research on silicon-silicon and aluminum-aluminum interface heat transport is carried out based on the torsion angle and temperature, and an important basis is provided for understanding an internal mechanism of heat transfer of solid materials with different contact interfaces and searching an effective method for controlling interface heat conduction.

The invention relates to the technical field of building materials, in particular to a light anti-corrosion cement-based prefabricated part as well as a preparation method and application thereof. The cement-based prefabricated part is prefabricated and formed by bonding a base body located on the inner layer of the cement-based prefabricated part and a surface material located on the peripheral layer of the cement-based prefabricated part through an adhesive and performing microwave heating. Wherein the surface material is prepared from filler, modified stone powder, cement and the like through colloid mill shearing treatment and filter pressing treatment; the matrix is prepared by mixing a foaming agent, mineral powder, sodium hydroxide, metakaolin, aggregate, polypropylene fiber, calcium lignosulphonate and the like, putting into a mold, performing steam curing and demolding. The outer surface of the base body is coated with an adhesive, and the surface material and the base body are combined in a vibration extrusion forming mode and then subjected to microwave heating treatment to be manufactured into the cement-based prefabricated part. The cement-based prefabricated part is high in salt resistance, freezing resistance and acid resistance, light in weight and suitable for being used as a building material in a cold region, including curbs.

A system and method for controlling motorized vents of an HVAC system of a vehicle including at least one motor to move air louvers of an HVAC vent of the HVAC system, at least one thermal sensor to sense hot / cold areas inside the vehicle, and a position and motion control to control movement of the at least one motor, wherein position and motion control determines a targeted positioning of airflow based on hot / cold areas sensed by the thermal sensor.

The utility model belongs to the technical field of medical equipment for field operations, particularly relates to a comprehensive guarantee trailer of a field operation vehicle, and aims to solve the problems that an existing medical vehicle is time-consuming and labor-consuming to unfold and carried matched medicines are easy to freeze, and adopts the following scheme that the comprehensive guarantee trailer comprises a trailer assembly and a corridor assembly, and is provided with the trailer assembly and the corridor assembly, when the corridor assembly is in the unfolded state, the front end of the corridor assembly can extend and be tightly attached to the position of a rear channel of a compartment body after the field operation vehicle is unfolded, inconvenience caused by repeated material loading and unloading is avoided in the unfolding and folding process, the unfolding and folding time of a field medical team is greatly shortened, and rapid unfolding and folding of the whole operation process are achieved; the problem that related medicines in the operation in the cold region are easy to freeze is fundamentally solved; the driving assembly has a manual driving mode or an electric driving mode, manual driving or electric driving unfolding or folding of the shear fork type telescopic corridor frame can be selected in a targeted mode according to specific use conditions, and the requirement for use in different field operation environments is met.

The invention provides an inorganic fiber spraying device for a plateau severe cold area, and belongs to the technical field of inorganic fiber spraying. The inorganic fiber spraying device in the plateau severe cold area comprises a material pipe, a support is installed at the front end of the material pipe, a conical cover is arranged at the front end of the support, a hot air cavity is formed in the conical cover, an annular opening is formed in the bottom end of the conical cover, a flow guide cover is connected to the rear end of the conical cover, a flow guide fan is arranged in the flow guide cover, and a hot air pipe is connected to the rear end of the flow guide cover. The inner wall face of the conical groove is arranged to be in a step shape in the axial direction, hot air holes are formed in the top face of the step at equal intervals in the circumferential direction, the front end of the support is sleeved with the flow guide cover and the conical cover, the front end of the support is provided with a channel opening used for inorganic fibers in the material pipe to enter the conical cover, and the inner diameter of the channel opening is larger than the outer diameter of the material pipe.

The invention discloses an ultra-low temperature toughened nylon glass fiber reinforced composite material, a preparation method and an application thereof. The composite material comprises 50-70 parts of nylon resin, 20-40 parts of glass fiber, 5-10 parts of toughening agent, 0.1-5 parts of cross-linking agent and 0.1-10 parts of other auxiliary agents by weight; the toughening agent comprises a maleic anhydride modified elastomer; the cross-linking agent comprises an amino cage silsesquioxane; the composite material has a simple supported beam notched impact strength of ≥15 kJ / m at -50 °C 2 The impact rod is tested at 50°C without breaking at least once. The ultra-low temperature toughened nylon glass fiber reinforced composite material of the present invention has both high impact strength and mechanical toughness in a wide temperature range, especially in an ultra-low temperature environment, and can meet the needs of railways, highways, electricity and other facilities in cold areas.