176 results about "Natural ventilation" patented technology

The present invention relates to the technical field of natural ventilation in buildings, and in particular to a computationally assisted decision-making method and system for climate-adaptive building cavity design. The method comprises: using a Delaunay triangulation method to generate an initial mesh, using a Laplace operator-based mesh refinement method to adaptively refine the initial mesh, so as to obtain an adaptive mesh system, wherein the adaptive mesh system is used for dynamically adjusting the mesh density of conditional PINNs; constructing a multi-task learning framework within the conditional PINNs, wherein the multi-task learning framework is used for jointly predicting a plurality of physical field variables within the conditional PINNs; and iteratively training the conditional PINNs, and using a gradient descent algorithm to minimize a loss function until a predetermined number of training iterations or loss convergence is reached, thereby generating a key physical field variable prediction model in building cavity design. The present invention can implement efficient and accurate prediction of key physical quantities in building cavity design, and can be adapted to different building layouts and functional space characteristics.

The utility model belongs to the field of building photovoltaic technology, and relates to a photovoltaic ventilation enclosure structure system based on evaporative cooling, which comprises a building outer enclosure structure surface, a photovoltaic panel and a ventilation cavity, the ventilation cavity is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively provided with shutters capable of being controlled to be opened and closed; a heat conduction or heat exchange device is arranged between the shady face of the photovoltaic panel and the outer wall of the ventilation cavity, and the surface of the building outer envelope structure and the photovoltaic panel are located on the two opposite sides of the ventilation cavity respectively. The passive evaporative cooling mode is clean, pollution-free, energy-saving, carbon-reducing, remarkable in cooling effect and economical; the mode of combining natural ventilation with evaporative cooling is adopted, the cooling effect is more obvious, meanwhile, the hot and humid environment of a building envelope structure can be regulated and controlled, and cold and hot load energy of a building is reduced.

The energy-saving curtain wall structure with the ventilation function comprises a curtain wall body, the inner side of the middle of the curtain wall body is hollow and sealed, ventilation grooves are formed in the upper side and the lower side of the curtain wall body, and shutters are arranged in the ventilation grooves; the louver comprises a plurality of rotating shafts rotationally arranged on the inner sides of the ventilation grooves and louver blades arranged on the outer sides of the rotating shafts; grooves are formed in the side edges of the upper side and the lower side of the curtain wall body correspondingly, the ends of the rotating shafts in the corresponding ventilation grooves penetrate into the grooves, and gears are fixedly arranged at the ends of the rotating shafts. According to the curtain wall, through pure mechanical linkage of the memory alloy spring, the rack, the gear and the rotating shaft, the blind window can be automatically opened and closed along with the room temperature, a motor, a sensor or manual intervention is not needed, manual operation is thoroughly eliminated, the response speed only depends on physical phase change of the memory alloy, and the automation level is remarkably improved. The hollow sealed curtain wall main body and the upper and lower ventilation slots form a chimney effect channel which is linked with the shutters to amplify the natural ventilation efficiency.

The invention discloses a natural ventilation cooling tower and a dumbbell-shaped concrete filled steel tube cross strut thereof, the dumbbell-shaped concrete filled steel tube cross strut comprises four dumbbell-shaped steel tube limb columns and cross nodes, and the end parts of the dumbbell-shaped steel tube limb columns are connected with the cross nodes to form a cross structure; the cross joint comprises a vertical stiffening plate, an upper reinforcing ring, a lower reinforcing ring, a plurality of joint sleeves and a plurality of joint webs, the upper reinforcing ring and the lower reinforcing ring are perpendicularly crossed with the vertical stiffening plate, the joint webs are connected with the joint sleeves, and the joint sleeves, the joint webs, the upper reinforcing ring and the lower reinforcing ring form a dumbbell-shaped structure with the vertical stiffening plate as the central axis. Open holes are formed in the reinforcing rings and used for pouring and circulation of concrete, the four dumbbell-shaped steel pipe limb columns are arranged at the open holes of the upper reinforcing ring and the lower reinforcing ring, and a closed space is formed by the joint sleeve, the joint web, the upper reinforcing ring, the lower reinforcing ring and the four dumbbell-shaped steel pipe limb columns. The problem of material waste caused by rich in-plane directional bearing capacity of a circular section can be solved.

The invention discloses a natural draft cooling tower and a lattice type concrete filled steel tube cross strut thereof, the lattice type concrete filled steel tube cross strut comprises four lattice columns and cross nodes, the end parts of the lattice columns are on the same plane and are connected with the cross nodes to form an X-shaped structure, and each lattice column comprises a concrete filled steel tube column limb and a web member for connecting the adjacent concrete filled steel tube column limbs; the cross joint comprises two joint branch assemblies and a joint belly assembly connected with the two joint branch assemblies, and each joint branch assembly comprises a joint panel, a first covering panel and a second covering panel, wherein the first covering panel and the second covering panel cover the joint panel. The joint face plate comprises a joint top plate, a joint bottom plate, a joint stiffening plate and a reinforcing ring plate, the joint stiffening plate and the reinforcing ring plate are arranged between the joint top plate and the joint bottom plate, and open holes are formed in the joint top plate, the joint bottom plate and the reinforcing ring plate and used for concrete pouring and circulation. And the four latticed columns are arranged at the holes of the node top plates and the node bottom plates of the two node branch assemblies. The use amount of strut steel and concrete is reduced, and the construction speed and the construction quality are improved.

The invention discloses a multi-shaft ultra-long high-ground-temperature railway tunnel fan optimization configuration method which comprises the following steps: acquiring basic calculation parameters of a multi-shaft ultra-long railway tunnel, and further establishing a physical model; based on the physical model, establishing a multi-shaft super-long railway tunnel surrounding rock-lining-airflow-ventilation network heat, humidity and flow coupling mathematical model, and performing rapid solving; on the basis of a mathematical equation solving result of the mathematical model, the feasibility of temperature control and humidity control under the working condition of only natural ventilation is judged, for the working condition that only natural ventilation is not feasible, a ventilation fan decision-making variable is selected, and optimization design is conducted on fan configuration with ventilation energy consumption as the target and the maximum temperature and humidity along the way as the constraint; according to the method, optimization of the fan configuration scheme under the multi-factor working condition is achieved.

The invention relates to the technical field of air purification equipment, in particular to an unpowered public place air directional flow purification structure. The problems that in the prior art, the natural ventilation principle and the multi-stage purification function cannot be fused on the structural design level, and consequently inherent defects exist in the aspects of energy consumption, noise, maintenance cost, airflow organization stability and the like are solved. The unpowered public place air directional flow purification structure is arranged on a wall unit and comprises a micropore physical pre-filtering structure, a multi-layer labyrinth type physical filtering structure and an adsorption / deposition structure which are integrally arranged in a closed mounting cavity in the wall unit. In the operation process of the structure, no fan or motor or external power supply is needed in the whole process, air circulation is driven by completely depending on the thermal characteristics of the wall and weak thermal buoyancy formed by an indoor environment heat source, no mechanical moving part exists in the operation process, the noise level is low, and the noiseless requirement of a hospital ward area at night is met.

A windproof system for a natural draft vehicle-mounted water heater includes components such as a panel, base frame, hot water tank, fume hood assembly, isolation baffle, gas ejector assembly pipe, pressure regulating valve assembly, and sealing strips. When the vehicle is in motion or in windy conditions, the system directs airflow through the sealed assembly of the panel and base frame. Simultaneously, the fume hood assembly diverts and regulates the airflow, and the isolation baffle acts as a flow barrier, ultimately achieving pressure balance between the U-shaped air inlet and outlet of the hot water tank, ensuring the water heater remains in normal combustion mode. This design offers advantages such as good windproof performance, relatively independent air intake and exhaust, and minimal impact of the combustion process on electrical components and non-high-temperature resistant parts.

The utility model relates to the technical field of poultry house double-layer protective ceilings, and discloses a naturally ventilated Taihe black-bone chicken stocking poultry house double-layer protective ceiling structure which comprises a frame and a top-layer ceiling, a linkage adjusting mechanism is arranged on the left side of the top-layer ceiling, and the linkage adjusting mechanism comprises a rotating shaft, a gear, a connecting sliding block, a rack and a limiting rod. And the outer surface of the rotating shaft is rotationally connected with the inner wall of the top-layer shed roof. According to the naturally-ventilated double-layer protective ceiling structure of the Taihe black-bone chicken stocking poultry house, through the use of the rotating shafts, the bearing blocks and the direction adjusting plates, the angle of the direction adjusting plates can be adjusted and changed according to reality, the effect of convenient adjustment is achieved, the structure can be used according to different requirements, and then the problem of how to control the ventilation angle is solved; the effect of changing the ventilation direction according to the actual environment can be achieved, weather interference in the breeding process is avoided, and more efficient breeding operation is facilitated.

The utility model belongs to building curtain wall technical field especially can adjust indoor temperature's building curtain wall, including stand, be provided with crossbeam on stand, crossbeam outside is provided with inner layer glass, one side of inner layer glass is provided with outer layer glass, outer layer glass outside is provided with decoration buckle, forms hollow layer between outer layer glass, inner layer glass, top ventilation opening includes mounting frame, vane, sealing frame, connecting shaft and disc spring. The utility model discloses through inner layer glass, outer layer glass, hollow layer, top ventilation opening, vane, bottom ventilation opening, realizes the temperature control of building indoor through outside natural ventilation and seasonal mode switching, avoids the structure of intelligentization, reaches indoor temperature control effect on the basis of low cost, easy maintenance, turns over the vane in top ventilation opening, bottom ventilation opening, and the flowing air from bottom ventilation opening enters hollow layer and flows, and the heat in hollow layer is taken away from top ventilation opening, guarantees the cool feeling of indoor.

The invention relates to the technical field of building physics and artificial intelligence crossing, and discloses a traditional village dwelling thermal performance prediction system based on deep learning, comprising a data acquisition module for acquiring solar radiation, wind speed and direction, internal and external pressure difference and indoor and outdoor temperature; the radiation decoupling network module is used for predicting the net radiation heat flux of the outer surface according to the solar radiation, the sun position and the component posture; the microclimate permeation network module is used for predicting a convective heat transfer regulation factor according to the pressure difference, the wind and the opening state; the implicit state network module adopts a circulation structure and introduces an implicit thermal state vector to represent the thermal inertia of the enclosure structure; and an indoor thermal environment integration module that integrates the convective heat flux based on the heat balance and outputs an indoor air temperature predicted value. According to the system, through decoupling modeling of radiation, permeation and heat transfer of the enclosure structure, prediction interpretability of the indoor thermal environment of a traditional dwelling is improved, and the system is suitable for building scenes which are built with non-standard materials such as rammed earth and depend on natural ventilation.

The utility model belongs to the technical field of building facades, and discloses a building energy-saving facade structure which comprises a building facade and a ventilation window, a ventilation groove is formed in the side wall of the building facade, the ventilation window is hinged to the side wall of the building facade, a groove is formed in the side wall of the building facade, and a fixing ring is installed in the groove. A ventilation window is arranged on the outer vertical face of the building, a groove is formed in the outer vertical face of the building, a rotating rod is rotatably installed in the fixing ring, one end of a connecting plate is installed on the side wall of the rotating rod, the other end of the connecting plate is installed on the upper wall of the ventilation window, and a shielding mechanism is installed on the inner side wall of the groove. And meanwhile, a shielding mechanism is further arranged in the groove, and the internal fixing ring, the rotating rod and other structures can be shielded through the shielding mechanism, so that external rainwater and the like are prevented from entering, and the situation that opening of the ventilation window is affected due to corrosion is avoided.

1 ABSTRACT: The present invention relates to a construction block system featuring a water tank module and controlled airflow. The system is designed to allow natural ventilation through an air intake system, with air entering via a channel that is separate from the blocks themselves. A vent located before the fan is used to control airflow based on the season. During summer, the vent is open to allow airflow through the water channels, while in winter it closes to prevent heat loss. ABSTRACT: The present invention relates to a construction block system featuring a water tank module and controlled airflow. The system is designed to allow natural ventilation through an air intake system, with air entering via a channel that is separate from the blocks themselves. A vent located before the fan is used to control airflow based on the season. During summer, the vent is open to allow airflow through the water channels, while in winter it closes to prevent heat loss. 1 20 25 23 06 71 09 S ep 2 02 5 2 0 2 5 2 3 0 6 7 1 0 9 2 0 2 5 S e p

This invention discloses an intelligent ventilation and control system for hazardous waste containers, relating to the fields of ventilation systems and control technology. It aims to solve the technical problems of traditional hazardous waste container ventilation systems, such as low ventilation efficiency, high energy consumption, inability to dynamically adjust ventilation volume according to the hazardous waste status, and the tendency to lead to the accumulation of harmful gases or resource waste. The system includes: a container monitoring module, located inside and outside the container, for collecting environmental parameters; an intelligent ventilation execution module, used to coordinate with the ventilation and natural ventilation openings to adjust the ventilation state inside the container; a linkage control center, used to process monitoring data and generate control commands; and an energy supply unit, providing power to all modules of the system. This invention, through a dynamic strategy of "natural ventilation priority + mechanical ventilation assistance," accurately matches the ventilation needs of different hazardous wastes, solving the core problem of existing systems' inability to dynamically adjust according to the characteristics of hazardous waste and the real-time environment.

The invention provides an allergy risk prediction method and device based on indoor physical environment simulation and electronic equipment, and relates to the technical field of medical health data analysis, and the method comprises the steps: constructing a parameterized three-dimensional building model based on spatial information; based on the three-dimensional building model and the external meteorological parameters, coupled physical field simulation is carried out on sunlight, natural lighting and natural ventilation conditions in the target building space, and quantitative environment field distribution data is obtained; matching and fusing the environment field distribution data with a preset risk mapping rule based on allergen breeding physical conditions, identifying and dividing different levels of environment risk areas in the target building space, and generating a visual risk distribution map with space coordinates; and generating a personalized report containing a targeted environment intervention strategy bound with the spatial position based on the specific risk area position and the grade thereof in the risk distribution map. According to the method, quantitative environment data support is provided, and health suggestions are upgraded from experience judgment to data decision.

The invention discloses a natural ventilation cooling tower inner wall corrosion prevention method adaptive to an extreme temperature difference environment, and belongs to the technical field of cooling tower corrosion prevention. Comprising the steps that leakage treatment is conducted, specifically, according to cracks, honeycomb-shaped defects and holes in the inner wall of the cooling tower, drilling is conducted by adopting drilling parameters matched with the extreme temperature difference, after a grouting water stop needle is embedded, a corresponding grouting material is injected according to the dry and wet state of a leakage part, after grouting is completed, preset time is observed, and after it is confirmed that no leakage exists, the grouting needle is cut off, and a needle hole is plugged; the exposed ribs on the inner wall of the cooling tower are subjected to rust removal, a cracked and warped concrete protection layer and loose concrete are chiseled away, the concrete missing position is repaired with anti-crack mortar, and the water content of the inner wall is controlled to be smaller than or equal to 8% by flushing a cylinder body for standby application; and anti-corrosion coating is conducted, specifically, the surface of the treated base layer is sequentially coated with cyanogen setting permeable seal primer, cyanogen setting intermediate paint and cyanogen setting waterproof and anti-corrosion finish paint.

The present application relates to the technical field of cooling tower, and particularly relates to a salt control and mist removal natural ventilation cooling tower and a working method thereof, which comprises a tower body, a water remover and a water collecting pool, the water remover is arranged above the inside of the tower body, the water collecting pool is arranged at the bottom of the tower body, a total cooling area is arranged below the inside of the tower body, the total cooling area is composed of staggered combination of wet cooling areas and dry cooling areas, the wet cooling areas and the dry cooling areas are used for changing the temperature and the humidity content of the flowing air, through cooperation of the dry cooling areas and the wet cooling areas, the mist can be removed, meanwhile, the salt-containing droplets can be evaporated in the flowing process, so that a large amount of salt deposition near the cooling tower can be avoided, the cooling of the circulating water by the dry cooling area does not cause evaporation loss, and water saving benefit is achieved.

According to the underground roadway ventilation system, the natural pressure difference between a tunneling roadway and an air return roadway is ingeniously utilized, and dirty air is automatically discharged to the air return roadway. The system comprises key components such as a tunneling roadway, an air inlet roadway, an air return roadway, an air supply part and an air suction pipe. The air inlet roadway conveys fresh air to the tunneling roadway through the air supply part, and the air suction pipe is arranged near the tunneling face to introduce dirty air into the air return roadway. The air return roadway and the tunneling roadway are not located on the same plane, natural ventilation power is formed through pressure difference, and an extra exhaust fan is not needed. In addition, the system can be provided with a detection device to monitor environmental parameters in the roadway in real time and intelligently adjust the air supply state. The ventilation system is simple in structure, energy-saving and environment-friendly, and the energy consumption and the maintenance cost of the ventilation system are effectively reduced.

The utility model discloses a novel sunshade daylighting board, including structural frame and at least one sunshade unit of setting on structural frame, sunshade unit includes first sunshade board and second sunshade board of interval arrangement, the front and back two ends of adjacent first sunshade board and second sunshade board are connected through a first connecting plate respectively, and its left and right sides are connected through a piece of blade seal plate respectively, the board surface of first sunshade board and second sunshade board is equipped with multiple rows of air hole group respectively, and each row air hole group is formed by multiple air holes and is arranged in length direction interval continuously, and the adjacent row air hole group on the same sunshade board is staggered and is arranged, so that one row air hole group is offset in length direction relative to its adjacent another row air hole group, and the rule of misalignment arrangement is formed, the utility model discloses guarantee the sunshade effect simultaneously, has improved natural ventilation efficiency significantly, and misalignment arrangement has strengthened structural aesthetic appearance and the uniformity of light scattering.

The utility model discloses an energy-saving enclosure structure which comprises a frame assembly, double-layer hollow glass, a sunshade assembly, a ventilation channel assembly and a transmission mechanism, the frame assembly is of a rectangular supporting structure formed by aluminum alloy sections, the double-layer hollow glass is fixed to the front side through a sealing rubber strip, and the sunshade assembly is installed on a transverse supporting beam through a rotating shaft. The transmission mechanism achieves angle adjustment of the sun shield through gear transmission. The ventilation channel assembly is provided with an S-shaped flow guide structure and a filtering device, and cooperative work of intelligent sun shading and natural ventilation is achieved in combination with the special structure of the wave-shaped sun shading plate. According to the structure, multi-assembly cooperative control is achieved through the mechanical linkage device, and compared with a traditional enclosure structure, the energy-saving efficiency is improved by 40% or above.

This invention belongs to the field of building structure technology, specifically an adaptive ventilation and light-transmitting building partition purification structure. It includes multiple linearly distributed bottom mounting carriers, with a first flow channel and a second flow channel sequentially passing through each carrier. The first and second flow channels are arranged perpendicularly and alternately. An upper movable slot is formed on the bottom mounting carrier above the first flow channel, and a displacement slot is formed on the top of the bottom mounting carrier. A sliding mechanism is provided on the bottom mounting carrier near the displacement slot. In the absence of wind, an electric guide rail drives a undulating rod to actively attract surrounding airflow, ensuring effective ventilation within the building. The electric guide rail is fixedly mounted on the top of the first top mounting carrier. When there is wind, the electric guide rail stops operating via a circuit board, allowing natural ventilation inside the device, facilitating use.

The utility model discloses a natural ventilation formula building wall structure, include: wall body, rotating rod, vane and adjusting mechanism, and the wall body surface is seted up with the ventilation groove, a plurality of rotating rod both ends respectively with the ventilation groove both ends inner wall rotation and are inserted and connect, a plurality of vane are set in rotating rod outer wall, adjusting mechanism is located in the ventilation groove, and adjusting mechanism includes rotation part and adjusting part, and rotation part is connected with rotating rod outer wall sleeve, and adjusting part and rotation part outer wall engage connection, and adjusting part is used for driving rotation part rotation, the utility model discloses setting up adjusting mechanism in the wall body, and the push pull link is promoted, and the rack bar is moved through pull link movement, and the straight spur gear is moved through the rack bar movement and drives the rotation, and the rotating rod is rotated through the straight spur gear rotation and drives, and the vane is rotated through the rotating rod rotation and drives, and the opening and closing angle of vane is adjusted, can be through the vane angle change and is adjusted to the wind direction flow rate of natural wind, improves the ventilation efficiency.

The utility model relates to the field of grain storage equipment, in particular to a structure for reducing dust overflow of a vertical silo, which comprises a first vertical silo and a second vertical silo, natural air ports are arranged on the first vertical silo and the second vertical silo, and the natural air ports of the two vertical silos are communicated through a balance air pipe. According to the structure for reducing dust overflow of the vertical silos, the natural ventilation openings of the two vertical silos are communicated through the balance air pipe, positive-pressure airflow generated during feeding is discharged into the other silo without feeding through the air pipe, and the dust overflow of the vertical silos is reduced. The purpose of inhibiting dust leakage is achieved by dispersing and balancing the pressure of positive-pressure airflow in the bin.

The invention provides a balcony arbor layout optimization method based on a conditional diffusion generative model, and the method comprises the following steps: S1, obtaining summer climate parameters of a region where a fourth-generation housing project is located and a size and position relation between a hanging garden type balcony and an indoor space, generating project scene description data according to the summer prevailing wind direction, the opening orientation of the hanging garden type balcony and the communication condition of the hanging garden type balcony and each main room; the invention provides a balcony arbor layout optimization method based on a conditional diffusion generation model, and aims to establish a hanging garden type balcony arbor layout automatic generation and optimization method which can give consideration to the connectivity of a ventilation channel in a prevailing wind direction and the thermal comfort requirement of multiple rooms under the given summer climate and building geometric conditions of a fourth-generation house. The hanging garden type balcony arbor configuration is matched with natural ventilation of a building and an indoor thermal environment in a synergetic manner. The air garden type balcony arbor configuration can be optimized while the ventilation channel is guaranteed to be smooth, the indoor thermal comfort in summer is improved, and manual trial calculation is reduced.

The utility model discloses a ventilation and lighting integrated structure of a green teaching building, which belongs to the technical field of ventilation and lighting of the green teaching building, and comprises a window frame and a glass frame, the glass frame is arranged in the window frame, a ventilation component is arranged in the window frame, and the ventilation component is arranged in the window frame. Lighting assemblies are arranged in the window frame and the glass frame; the motor drives the low-emissivity glass to rotate, so that efficient natural ventilation can be achieved, indoor hot air or contaminated air can be guided to the outside through rotation of the low-emissivity glass, bidirectional airflow circulation is formed, the ventilation efficiency is further improved, the air quality is improved, heat transfer can be reduced through the low-emissivity glass, and the energy consumption is reduced. The indoor temperature is kept stable, the phenomenon of unsmooth ventilation or excessive ventilation caused by manual intervention of traditional ventilation is avoided, solar energy is converted into electric energy through the light absorption plate, the storage battery supplies power to the illuminating lamp and the motor, and dependence on a traditional power grid is reduced.

The invention discloses a residential building intelligent ventilation control method, system and device based on health requirements and natural ventilation potential and a storage medium, and relates to the technical field of building environment and energy conservation, and the method comprises the steps: determining the minimum ventilation quantity of the health requirements of a target control region based on the dosage-reaction relation between the ventilation quantity and regional population health; collecting the real-time natural ventilation quantity of the target control area; according to the minimum ventilation quantity and the real-time natural ventilation quantity required by health, whether a mechanical ventilation system needs to be started or not is judged; and controlling the mechanical ventilation system to operate according to the optimal intermittent operation control strategy. According to the method, the health demand ventilation target is set based on the dose-reaction relationship between the ventilation quantity and the human health, and compared with control based on single pollutant concentration, the method can more comprehensively reflect the human health demand. The optimal intermittent operation strategy of the mechanical ventilation system is determined through a multi-objective optimization algorithm, the health risk and energy consumption are balanced, and energy-saving and efficient ventilation control is achieved.

The utility model relates to the technical field of cashier desks, and discloses a cashier desk which comprises a cashier desk body and a ventilation mechanism, and the ventilation mechanism comprises a liquid storage tank fixedly connected to the bottom of the cashier desk body and a heating rod installed on the inner wall of the liquid storage tank. According to the cashier desk, a working environment suitable for four seasons can be provided for cashiers through the arranged ventilation mechanism, the adjustable ventilation mechanism is adopted for solving the problem that the natural ventilation effect of a working area is limited, the air temperature is adjusted in different seasons, and the cashiers are prevented from feeling uncomfortable due to muggy or cold air; a cashier can add water or cooling liquid into the liquid storage tank according to needs, the fan drives air to flow through the snake-shaped metal pipe and make slow and full contact with the stored liquid on the wave-shaped metal plate, efficient cooling or heating is achieved, the cooled or heated air is fed into the position between the sealing plates and finally exhausted through the air outlet, and the comfortable temperature is kept. And the cashier is ensured to efficiently work in a pleasant and fresh environment for a long time.

The ecological floating ball natural ventilation device comprises an air supply cylinder and a fixing plate, mounting grooves are symmetrically formed in the upper end of the inner side face of the air supply cylinder, one-way valves are fixedly connected into the mounting grooves, and the bottom of the inner side of the air supply cylinder is symmetrically connected with one ends of air guide pipes; and meanwhile, the upper end of the outer side face of the air supply cylinder is fixedly connected with a fixing plate, confluence grooves are correspondingly formed in the positions, opposite to the one-way valves, of the inner side face of the fixing plate, penetrating grooves are symmetrically formed in the surface of the fixing plate, and meanwhile the two ends of the penetrating grooves communicate with the corresponding confluence grooves through flow guide grooves. According to the natural ventilation device, airflow can stably flow through the one-way valve through cooperation of the fixing plate, the penetrating groove, the flow guide groove and the confluence groove, external liquid is prevented from synchronously flowing into the air supply cylinder along with the airflow, the one-way valve can be prevented from being blocked by external sundries, and the stability of the natural ventilation device in use is improved.

The application relates to the technical field of a jack-up platform, and discloses a fixed pile room of a cross-shaped lifting system of a jack-up platform, which comprises a surrounding wall, a working space of the fixed pile room is formed in the surrounding wall, a top plate is arranged at the top of the surrounding wall and connected to the surrounding wall, a ventilation lifting hole is formed in the top plate, a ventilation cover is arranged at the ventilation lifting hole, a box-type fixed pile structure is fixedly connected to the inner top of the surrounding wall, and a pile leg is arranged in the working space and connected to the center of the box-type fixed pile structure. When the fixed pile room is installed, the ventilation lifting hole is used for lifting the fixed pile room, and when the jack-up platform works, the ventilation lifting hole is used for ventilation in the room. The ventilation lifting hole and the ventilation cover are matched, the ventilation lifting hole has the functions of equipment lifting and natural ventilation, the hatch cover does not need to be frequently opened and closed during operation, rain and snow are prevented from entering, the temperature and air pressure in the fixed pile room are effectively reduced through air convection, and the working environment of maintenance personnel is obviously improved.

The invention belongs to the technical field of tunnel natural ventilation and smoke exhaust, and relates to a highway tunnel vertical shaft natural ventilation design method based on an unpowered hood. The method comprises the following steps that the tunnel height, the fire source heat release rate, the environment air density, the air constant pressure specific heat capacity, the environment air temperature, the pressure intensity in a tunnel, the pressure intensity outside the tunnel, the smoke temperature in the fire disaster and the occupied area of a single unpowered hood on the top of a vertical shaft are collected; determining the width and height of the vertical shaft; determining the effective exhaust volume flow rate of a single unpowered hood; determining the total smoke discharge volume flow to be borne by the vertical shaft in the tunnel fire; the number of the needed unpowered air caps is determined according to the total smoke exhaust volume flow needing to be borne by the vertical shaft in the tunnel fire disaster, the effective exhaust volume flow of the single unpowered air cap, the occupied area of the single unpowered air cap on the top of the vertical shaft and the width and height of the vertical shaft. The ventilation hood can be combined with an unpowered hood to achieve the optimal ventilation effect, and the ventilation and smoke exhaust effect of the vertical shaft is further improved.