44 results about "Ventilation shaft" patented technology

The invention discloses an energy-saving air conditioning system for a building. The energy-saving air conditioning system comprises a ventilation shaft, a tunnel air pipe, a TLambert wall, a sky radiation layer and a heat storage layer. The heat storage layer is arranged at the top of the ventilation shaft; the TLambert wall is arranged on the sunny side of the ventilation shaft and is relatively close to the top of the ventilation shaft; the sky radiation layer is arranged on the shady side of the ventilation shaft and is relatively close to the bottom of the ventilation shaft; the tunnel air pipe is used for being communicated with or disconnected from the bottom of the ventilation shaft so that temperature difference can be formed in the ventilation shaft and air can be driven to flow from bottom to top. A condensation face is arranged in the ventilation shaft, and the condensation face is located on an air flowing path and used for dehumidifying air. A coupled passive cooling and dehumidifying building energy-saving air conditioning system is formed by tunnel air, sky radiation, a Tembert wall, phase change heat storage and a condensing surface, and the cooling and dehumidifying effects can be achieved by completely depending on renewable low-grade natural energy without mechanical driving such as a fan or a compressor.

This invention provides a ventilation and defogging system for integrated utility tunnel ventilation, relating to the field of ventilation control technology. The system further includes: a circulation pipe assembly fixedly connected to the main body of the utility tunnel and the ventilation shaft; and a mechanical ventilation component, the bottom of which is installed on top of a firewall, and the top of which is inserted into the ventilation shaft. Air within the main body of the utility tunnel is dehumidified and purified by the circulation pipe assembly, and then returned to the interior of the main body of the utility tunnel via the mechanical ventilation component. This isolates the external environment while achieving internal air circulation, dehumidification, and purification within the main body of the utility tunnel, thus optimizing the air quality inside the utility tunnel.

The utility model is applicable to the technical field of underground shafts, and provides a lighting and ventilating shaft for underground space, which comprises a shaft body. The well mouth is communicated with the upper portion of the well body, and a mounting frame is arranged at an opening of the well mouth and is obliquely arranged; a reflective main lens is arranged at the upper part of the well body close to one side with larger inclination gradient of the mounting frame; a first light-reflecting secondary lens is arranged at the inclined lower position of one side, opposite to the light-reflecting primary lens, of the well body; a second light reflecting secondary lens is arranged at the inclined lower position of one side, opposite to the first light reflecting secondary lens, of the well body; through collaborative optimization of the daylighting skylight and the reflective lenses, natural light is introduced into the well body to the maximum extent, sufficient and uniform natural illumination is provided for underground space, and effective energy conservation and implementation of the environment protection concept are achieved; meanwhile, the ventilation system can efficiently adsorb and discharge foul air in the underground space, and the air quality is remarkably improved.

The utility model discloses a portable environmental noise detection device, which relates to the technical field of environmental noise detection and comprises a sensing detection ball, a support telescopic rod, a detector and a connecting wire penetrating through the support telescopic rod to be connected with the sensing detection ball. The other side of the top surface of the detector is provided with an adapter connector, and the adapter connector is connected with one end of a connecting wire in an inserted manner. According to the utility model, through the cooperation of the supporting telescopic rod and the sensing detection ball, the sensing detection ball can conveniently extend into a narrow space, such as a narrow aisle of an old community in a city, a narrow ventilation shaft in a building and the like, for noise detection, and the detection convenience is improved; finally, the problems that a button cannot be accurately touched and effective detection is difficult due to the fact that a traditional handheld device is inconvenient to operate in a narrow space are solved, and the efficiency and convenience of noise detection in the narrow space are improved.

The application discloses a kind of ventilation parameter processing method and system for the whole world water-rich karst tunnel small section multi-shaft, comprising the following steps: determining small section shaft clearance diameter D And single well ventilation capacity, and determine the upper limit of main hole design wind speed to obtain the maximum wind capacity of main hole;Select control need air volume index, calculate the air volume and establish relative index, determine the critical distance L 1 when relative index reaches limit value L First exhaust shaft is arranged near L 1 And downstream air supply shaft constitutes "one exhaust one supply" ventilation unit, according to different section relative index check and iterative arrangement of multiple groups of shafts form shaft group, so that downstream available air volume meets the next partition air volume.The application replaces the traditional large-diameter ventilation shaft by adopting small-section shaft group suitable for mechanized construction, which can reduce the construction risk of shaft in the whole water-rich karst section, reduce the exposure of underground personnel, and improve the engineering applicability and construction safety.

The utility model discloses an assembly type out-of-roof air shaft structure which comprises a positioning shaft integrally formed with a roof panel, a prefabricated shaft arranged on the outer side of the positioning shaft in a sleeving mode, a prefabricated hoop beam arranged on the outer side of the prefabricated shaft in a sleeving mode and a shaft cover plate installed at the top end of the prefabricated shaft. The bottom face of the prefabricated hoistway and the bottom face of the prefabricated hoop beam are tightly attached to the top face of the roof panel, ventilation holes are formed in the prefabricated hoistway, an annular groove matched with the top end of the prefabricated hoistway is formed in the bottom face of the hoistway cover plate, and a roof pavement layer is arranged on the roof panel. And a roof waterproof layer of the roof pavement layer extends upwards from the roof panel and is paved on the outer side surface of the prefabricated hoistway. According to the utility model, the structure is simple, under the combined action of the positioning hoistway and the prefabricated hoop beam, the mounting position of the prefabricated hoistway can be accurately positioned, the mounting reliability and stability of the prefabricated hoistway can be ensured, the prefabricated assembly rate is high, the construction efficiency is greatly improved, the construction time is saved, and the waterproof effect is good.

The utility model discloses an air shaft structure for civil air defense engineering, which comprises a main body, a ventilation fan, an escape platform, a first escape ladder stand and a second escape ladder stand, in the air shaft structure for civil air defense engineering, when a fire disaster occurs in a parking lot, people far away from a conventional escape channel can escape into the air shaft structure for civil air defense engineering nearby and enter a shaft way; the escape ladder climbs to the escape platform through the first escape ladder to wait temporarily, then climbs to the position below the opening through the second escape ladder in order, and the blocking door is opened upwards to achieve escape. By means of the design of the escape platform, on one hand, escape personnel are farther away from the fire, a temporary rest waiting point for the personnel to climb upwards is provided, and the personnel are prevented from being blocked at the narrow opening. And more escape persons can be contained in the hoistway, the person bearing capacity of the hoistway is improved, and therefore the survival probability of the escape persons is increased.

A ventilation system for an underground tunnel pumped storage space includes a working shaft and a ventilation shaft that directly lead to the underground tunnel space. The working shaft and the ventilation shaft are interconnected, forming an inlet and outlet for the air to circulate in the underground tunnel. The underground space is divided into a water-filled space and a non-water-filled space by a waterproof gate wall. Both spaces are connected to the main ventilation channel formed by the working shaft and the ventilation shaft. In order to meet the different ventilation needs of the two separated underground spaces, the present invention proposes a ventilation system that meets the needs of the underground water-filled space and the non-water-filled space. The present invention sets different ventilation processes based on the layout differences and functions of the underground tunnel space to meet the ventilation and air exchange needs of each stage of operation and shutdown and maintenance, realize the physical isolation of the dangerous gas accumulation space and the equipment operation space, ensure the safety of the equipment and personnel areas, greatly reduce the explosion-proof performance requirements of the area for the equipment, reduce the one-time investment cost, and at the same time reduce the space for forced ventilation and reduce energy consumption during operation.

The utility model relates to an electric dust remover anode vibrating shaft sealing device which comprises a vibrating shaft, a vibrating motor and a device shell fixed on a wall plate of an electric dust remover shell and further comprises a ventilation shaft, and one end of the ventilation shaft penetrates through the device shell and is connected with the output end of the vibrating motor. The other end of the ventilation shaft penetrates through a wall plate of the electric dust remover shell and extends into the electric dust remover, and the end, located in the electric dust remover, of the ventilation shaft is fixedly connected with a vibrating shaft; an inner air inlet pipe is arranged on the device shell, air enters the device shell through the inner air inlet pipe, two annular holes are annularly formed in a ventilation shaft, and the two annular holes are used for communicating the interior of the device shell with the interior of the electric dust remover; a heating system is arranged on the outer wall of the ventilation shaft and used for heating air entering the ventilation shaft, a hot air curtain is formed at the position of an annular hole in the inner end of the electric dust remover on the ventilation periphery, and the air leakage problem of the anode vibrating shaft can be thoroughly solved.

The invention relates to the technical field of ventilation and smoke exhaust of navigable tunnels, and discloses a ventilation and smoke exhaust system of a large navigable tunnel, which comprises ventilation shafts arranged on two sides of the navigable tunnel, the tops of the ventilation shafts are directly communicated with the outdoor ground to be connected with a ventilation room, and a plurality of horizontal civil air ducts with different elevations are respectively arranged on two sides of the navigable tunnel. A plurality of civil engineering air duct openings communicating with the interior of the navigation tunnel are formed in the horizontal civil engineering air ducts at intervals, the horizontal civil engineering air ducts communicate with the ventilation shaft through civil engineering air duct transverse branch holes correspondingly, and air in the navigation tunnel sequentially passes through the civil engineering air duct openings, the horizontal civil engineering air ducts, the civil engineering air duct transverse branch holes, the ventilation shaft and the ventilation machine room to be exhausted to the outside. The invention further discloses an operation method of the ventilation and smoke exhaust system of the large navigation tunnel. According to the ventilation and smoke exhaust system of the large navigation tunnel and the operation method of the ventilation and smoke exhaust system, the problems of pollutant accumulation and untimely smoke exhaust in a fire disaster are solved, the air quality during normal operation is guaranteed, and smoke is rapidly exhausted under the working condition of the fire disaster.

The application discloses a building energy-saving air conditioning system, which comprises a ventilation shaft, an underground air pipe, a Trombe wall, a sky radiation layer and a heat storage layer; the heat storage layer is arranged at the top of the ventilation shaft; the Trombe wall is arranged at the sunny side of the ventilation shaft and is arranged close to the top of the ventilation shaft; the sky radiation layer is arranged at the shady side of the ventilation shaft and is arranged close to the bottom of the ventilation shaft; the underground air pipe is used for being communicated with or being cut off from the bottom of the ventilation shaft, so that the inside of the ventilation shaft can form a temperature difference and drive air to flow from bottom to top; a condensing surface is arranged in the ventilation shaft and is located on an air flow path, so as to dehumidify the air. The building energy-saving air conditioning system is coupled with passive cooling and dehumidification and is composed of the underground air pipe, the sky radiation, the Trombe wall, the phase change heat storage and the condensing surface, and can realize the effects of cooling and dehumidification by relying on renewable low-grade natural energy without the mechanical driving of a fan or a compressor.

The utility model discloses a cavity structure for converting an air pipe in soil covering, which comprises a civil engineering conversion cavity, a civil engineering conversion cavity, a civil engineering conversion cavity, a civil engineering conversion cavity, a civil engineering conversion cavity, a civil engineering conversion cavity, a civil engineering conversion cavity, a civil engineering conversion cavity, a civil engineering conversion cavity, a civil engineering conversion cavity and a civil engineering conversion cavity, the waterproof layer continuously covers the top of the civil engineering conversion cavity, and the waterproof layer and the basement roof waterproof layer form a closed-loop structure; the fine aggregate concrete protection layer covers the upper part of the waterproof layer and is 40mm in thickness; the air shaft is connected to the ground outlet end of the civil engineering conversion cavity, and a rainproof shutter is mounted at the top of the air shaft; the overhanging cornice is arranged on the outer side of the rainproof louver; the water drip is arranged around the overhanging eave; the basement roof waterproof layer is turned upwards along the outer wall of the air shaft, and the upturning height is larger than or equal to 250 mm; the height from the bottom of the rainproof shutter to the ground is larger than or equal to 500 mm. According to the modular connection design of the civil engineering conversion cavity and the air shaft, different soil covering depths and pipeline conversion angles can be flexibly adapted, and the reworking problem of a traditional vertical shaft caused by sudden change of the terrain is avoided.

This invention discloses a method for optimizing the layout of ventilation shafts in long tunnel sections, comprising the following steps: calculating the train operation curve within the long tunnel section; based on the required number of ventilation shafts *n*, initially determining the placement of each ventilation shaft and the length of each ventilation shaft section by dividing the long tunnel section into equal parts according to the principle of length; calculating the tracking interval time; verifying whether each ventilation shaft section can meet the tracking interval time requirement; if it cannot meet the requirement, adjusting the corresponding ventilation shaft positions and re-verifying until the tracking interval time requirement is met; and outputting the ventilation shaft layout scheme to the HMI interface. The advantages of this invention are: it meets the throughput requirements of long tunnel sections and also satisfies the safety constraint that only one train can pass through each ventilation shaft section.

The utility model provides a building ventilation door and window which comprises a crank connecting rod structure and a driving unit, the crank connecting rod structure comprises a ventilation push piece and a ventilation rotating shaft which are arranged in parallel, the ventilation door and window comprises a shutter arranged in the ventilation door and window, one end of the ventilation push piece is arranged on the shutter, and the other end of the ventilation push piece is arranged on the shutter. The crank connecting rod structure is arranged at one end of the ventilation push piece, a guide groove in sliding connection with the ventilation rotating shaft is formed in the other end of the ventilation push piece, the driving unit comprises a transmission shaft matched with the crank connecting rod structure in an inserted connection mode, one end of the ventilation rotating shaft is arranged in the guide groove, and the other end of the ventilation rotating shaft is fixedly connected with the transmission shaft. Stable movement of the ventilation push piece is achieved through the guide grooves in sliding connection, a single transmission shaft driving system is used, and the structure is more concise.

The application discloses a construction environment control system for underground water-sealed caverns in severe cold regions and a control method thereof, and relates to the technical field of underground engineering construction. The system comprises an in-cavern environment maintaining module and a cavern mouth environment regulating module. The in-cavern environment maintaining module is arranged at the bottom of a ventilation shaft and comprises a warm air supply unit for supplying heat to a working face and an air flow blocking unit for blocking air flow in the shaft. The cavern mouth environment regulating module is sealingly connected to the entrance of a main roadway and comprises a heat preservation shed for forming a buffer air chamber, a jet flow pressurizing device for generating upward jet flow, and a warm air curtain machine for forming a barrier air curtain under the door. After the shaft is blocked, the jet flow pressurizing device and the warm air curtain machine are simultaneously started to establish and maintain a positive pressure environment inside the cavern mouth. Through modular cooperation, the application realizes the unity of stable maintenance of the heat field in the cavern and efficient discharge of pollutants at the cavern mouth, and effectively eliminates water mist and freezing damage.

This invention relates to the field of basement ventilation shaft technology, specifically to a basement ventilation shaft flush with the ground. It includes a shaft body, which comprises side plates and a bottom plate; the side plates and bottom plate enclose a shaft cavity, the top of which is flush with the ground; a duct is provided at the side plate; one end of the duct is connected to a fan in the basement, and the other end is connected to a downward-curving elbow, the lower end of which has a downward-extending mounting pipe; an air outlet is formed through the mounting pipe, and a floating component is movably installed inside the mounting pipe. Addressing the issue of backflow prevention from the fan, this invention utilizes a downward-curving elbow connected to the duct to prevent rainwater from flowing into the duct after falling from the top, thus providing better protection.

The utility model discloses a garbage collection and transportation structure suitable for high-rise building construction, and relates to the technical field of building structures. The garbage collection and transportation structure suitable for high-rise building construction comprises a building main body, the building main body is provided with a ventilation shaft, the ventilation shaft is configured to be a transportation channel for transporting garbage, and a keel frame is arranged on each floor of the building main body around an opening of the transportation channel; and the keel frame is provided with a shielding door plate and a movable door plate which are used for shielding the opening of the transportation channel. According to the garbage clearing and transporting structure suitable for high-rise building construction, the ventilation hoistway of the building body serves as a transporting channel for transporting garbage, and the beneficial effects of being high in clearing and transporting efficiency, small in raised dust and low in cost are achieved.

The invention discloses a ventilation shaft of an urban underground comprehensive pipe gallery, and belongs to the technical field of urban underground infrastructure, the ventilation shaft comprises a shaft mechanism, the lower end of the shaft mechanism is connected with a ventilation pipe gallery, the upper end of the shaft mechanism protrudes out of the ground, and a ventilation mechanism is installed in the shaft mechanism; according to the underground pipe gallery cleaning device, the parts such as the ventilation mechanism, the transmission mechanism and the wiping mechanism are arranged, a servo motor of the ventilation mechanism drives ventilation fan blades to achieve the ventilation function, and meanwhile an output bevel gear and a transmission gear are synchronously driven to be in meshing transmission; the two symmetrical transmission mechanisms are driven by the transmission shaft to operate, the inner cleaning brush is driven to slide along the guide frame through linkage of the first connecting rod and other components, the inner cleaning brush is in linkage with the outer wiping brush of the wiping mechanism through the magnetic adsorption effect to synchronously move, and the inner cleaning brush and the outer wiping brush synchronously wipe the inner wall and the outer wall of the light-transmitting window correspondingly.

The air shaft structure comprises an air shaft body, a guide groove is formed in the edge of the inner wall of an air outlet shaft frame in a communicating mode, a ladder stand is fixedly connected to one side of the inner wall of the air shaft body, folding grooves are formed in the two sides of the inner wall of the air shaft body, and supporting blocks are installed on the inner walls of the folding grooves in an overturning mode. A fan is supported at the upper end of the supporting block, the edge of one side of the upper end of the fan is electrically connected with a connecting cable, and the other end of the connecting cable is electrically connected with the solar mechanism. According to the civil air defense engineering air shaft structure, the air outlet shaft frame and the solar energy mechanism can be conveniently, rapidly and stably installed through the bracket through the fixing bolts, the positioning installation buckling blocks and the positioning installation buckling grooves, maintenance is convenient, opening and closing can be rapidly turned over through the escape door plate, the escape effect is good, safety is higher, and practicability is high. Ventilation can be stabilized through the draught fan and the guide groove, the brush head and the ventilation shutter can be driven to slide and sweep through the sliding block and the sliding groove, and cleaning is convenient.

According to the air shaft structure capable of being used as the temporary garbage channel, the temporary sealing plate is poured on the first layer of the air shaft, the temporary sealing plate and the formwork within the projection range of the beam bottom on the periphery of the temporary sealing plate are not dismantled, and impact force of garbage falling from a high layer is diffused and finally transmitted to the bottom plate; the side, facing the outdoor, of the first layer of the air shaft is not built, so that garbage is transported to the adjacent garbage pool; inclined slideways are constructed at the tops of the temporary sealing plates, garbage concentration is facilitated, extruded polystyrene board vibration isolation layers are arranged on three walls of the air shaft in the slideway construction range in a cushioned mode, aerated blocks are built in the slideways for filling, and reinforced concrete surface layers are adopted as slideway surface layers; and garbage dumping ports with turnover cover plates are reserved at the bottoms of more than one layer of air shafts. The air shaft on the periphery of the building is used as a temporary garbage channel, so that garbage in a floor can be directly dumped to one floor and finally carried away from a garbage pool for treatment, a specially-assigned person is not needed for clearing and transporting, time and labor are saved, an elevator in the building is not occupied, the construction efficiency is improved, and the construction period is shortened.

The invention discloses a civil air defense and fire protection dual-purpose ventilation system with a poison filtering and ventilation function, which comprises a personnel sheltering engineering shared ventilation system, the personnel sheltering engineering shared ventilation system adopts a civil air defense, fire protection and ventilation dual-purpose fan which has the functions of air exhaust, smoke exhaust and wartime air inlet at ordinary times, and the fan is provided with three connector air connecting pipes, one interface is a usual air exhaust and smoke exhaust outlet and is connected into the ventilation shaft through a usual air pipe path, one interface is a wartime air inlet, the wartime air pipe path is connected with the ventilation shaft, the other interface is connected with an air pipe pipeline system in an engineering main body, the three interfaces are respectively provided with valves for control, and corresponding switching operation is carried out corresponding to different use working conditions. The whole underground ventilation system can guarantee a good ventilation effect at ordinary times and wartime, the number of adopted equipment is small, the occupied ground area is small, peacetime and wartime conversion operation is simple, efficiency is high, and toxic substances in air can be effectively filtered out.

This application relates to the field of building construction technology, and provides a ventilation shaft duct installation structure and its construction method. The installation structure includes: a roof slab, a duct body, a lifting and supporting assembly, a sleeve, a support and clamping assembly, and a suspension component. The duct body includes multiple duct sections spliced ​​together, with steel bars installed on the two opposite outer walls of each duct section. The lifting and supporting assembly is distributed around the duct body for lowering the duct sections one by one into the ventilation shaft. The sleeve is pre-embedded in the ventilation shaft structural wall. The support and clamping assembly extends through the sleeve into the ventilation shaft and is clamped and fixed with the steel bars. The upper end of the suspension component is connected to the roof slab, and the lower end is suspended and connected to the support and clamping assembly. The installation of the duct of this invention is carried out after the ventilation shaft construction is completed, which can reduce the overlap of processes and improve construction efficiency. After the multiple duct sections are assembled and spliced ​​on the roof slab, they are lowered into the ventilation shaft one by one. The connection process between the duct sections is safe and reliable, and the installation quality is guaranteed.

The utility model belongs to the technical field of building structures, and particularly discloses a basement ventilation shaft structure. A ventilation shaft of the structure is vertically arranged on one side of an underground fan room and communicated with the underground fan room, and a basement top plate is arranged at the top end of the underground fan room; the transverse air duct is transversely arranged between a basement top plate and a ground structure or transversely arranged below the ground structure on one side of the basement top plate, the vertical ventilation opening is vertically arranged above or on one side of the basement top plate and communicated with the outside, and the two ends of the transverse air duct are communicated with the ventilation shaft and the vertical ventilation opening respectively. The shutter is arranged at the top end of the vertical ventilation opening and is higher than the ground. By reasonably arranging the ventilation shaft structure, the influence of the ventilation shaft outlet on the upper building and the outdoor general drawing arrangement is effectively solved, so that the ground position of the basement ventilation shaft can be flexibly selected according to the upper building and the outdoor general drawing arrangement; the device has the characteristics of simple structure, convenience in construction, flexibility in arrangement and small influence on the existing building.

The utility model provides a roof low-clearance large-span air shaft top plate support-free closed system, which relates to the technical field of air shaft construction and comprises a roof concrete top plate, a plurality of concrete separation columns are arranged at the upper end of the roof concrete top plate, and prefabricated floor support plate connecting beams are arranged at the tops of the concrete separation columns. The top end of the prefabricated floor support plate connecting beam and the top end of the concrete separation column are located at the same elevation, and a cast-in-place concrete top plate is arranged at the upper end of the prefabricated floor support plate connecting beam. The ventilation quantity of the air shaft can be met, and the using function of the cavity air shaft is guaranteed.

The invention discloses a containment functional channel, which comprises at least two groups of passage ventilation channels, each group of passage ventilation channels is symmetrically arranged around a containment central functional area, and at least one group of passage ventilation channels is used as a first group of passage ventilation channels, is located in a water tank coverage area and is isolated from a water tank through an entity boundary. The rest passing ventilation channels located in the area not covered by the water tank serve as second-class passing ventilation channels, each passing ventilation channel comprises a pedestrian stairway and a facility channel, the pedestrian stairway and the facility channel are attached to share one side entity boundary, and each passing ventilation channel penetrates through all layers in the containment in the vertical direction; the vertical shaft structure of the facility channel serves as a ventilation shaft to be communicated with the air supply outlets of all the layers. The channel integration degree is high, the layout is reliable and reasonable, and efficient utilization of space is achieved through function integration. The invention also provides a containment system.

The utility model discloses a small-section tunnel construction ventilation device and a construction system. The small-section tunnel construction ventilation device comprises a ventilation shaft and an exhaust shaft. The upper end of the ventilation shaft is connected with a compressed air duct and an air inlet fan located in the compressed air duct, and the lower end of the ventilation shaft is provided with a flow guide cover located in the tunnel. The upper end of the exhaust shaft is connected with an exhaust duct and an exhaust fan positioned in the exhaust duct, and the lower end of the exhaust shaft is communicated with the tunnel; the ventilation shaft and the exhaust shaft are both constructed to be small-diameter shafts, and the depths of the two shafts are both smaller than the distance between the shafts and the tunnel portal. The small-section tunnel construction system comprises the small-section tunnel construction ventilation device. By arranging the small-diameter vertical shaft, the construction requirement of a small-section tunnel is met, construction is convenient, and the construction difficulty and cost are reduced; the problem that in the prior art, an air pipe extrudes the construction operation space is solved, and the problem that the air pressure loss is too large due to the too long ventilation distance can also be avoided.

The application discloses a people's air defense and fire dual-purpose ventilation system provided with a filter ventilation, comprising a people's air defense and fire dual-purpose ventilation system, which adopts a people's air defense and fire dual-purpose fan, has the functions of normal time air exhaust, smoke exhaust and wartime air intake, and is provided with three interfaces for connecting air pipes, one interface is a normal time air exhaust and smoke exhaust outlet connected with a ventilation shaft through a normal time air pipe path, one interface is a wartime air intake inlet connected with the ventilation shaft through a wartime air pipe path, and the other interface is connected with an air pipe pipeline system in a main body of the project, valves are arranged at the three interfaces respectively, corresponding switching operations are conducted according to different working conditions, the whole underground ventilation system can ensure good ventilation in normal time and wartime, the number of adopted equipment is small, the occupied ground area is small, the conversion operation is simple and efficient in normal time and wartime, and the air defense and fire dual-purpose ventilation system can effectively filter toxic substances in air.

The utility model relates to the technical field of fire protection engineering, in particular to an underground fire protection engineering ventilation and noise reduction device which comprises a ventilation shaft, sound absorption cotton, an air inlet assembly, a discharging assembly, a control assembly and an air pipe silencer. The sound-absorbing cotton is mounted on the ventilation shaft; the air inlet assembly is mounted in the sound-absorbing cotton; the discharge assembly is mounted on the ventilation shaft; the control assembly is mounted on the ventilation shaft; the control assembly comprises a control panel, the control panel is connected with a clamping plate, the control panel and the clamping plate are both connected with a sealing sleeve and a connecting block, the connecting block is provided with a sleeve body, the sleeve body is installed at the driving end of an electric push rod, and the electric push rod is installed on the outer wall of the ventilation shaft through a support. And the air pipe silencer is mounted in the ventilation shaft. The clamping plate and the control plate penetrate through the opening c to move into the ventilation shaft, air in the underground fire engineering is exhausted through cooperation of the exhaust fan b, the situation that the air in the ventilation shaft flows back into the underground fire engineering is reduced, and the ventilation effect is improved conveniently.

The invention discloses a partitioned controllable ventilation system of a multi-cavity regulating reservoir, and belongs to the technical field of ventilation. The ventilation system comprises a regulating reservoir, an exhaust branch hole, a ventilation shaft, an air draft fan, an air supply fan and a separation barrier; the adjusting pool comprises a plurality of caverns, the exhaust branch holes are located above the adjusting pool and communicated with the caverns, one end of the ventilation shaft is communicated with the ground environment, the other end of the ventilation shaft is communicated with the exhaust branch holes, the air draft fan is installed on the ventilation shaft and connected with a plurality of first ventilation pipes, and each cavern corresponds to at least one first ventilation pipe. The first ventilation pipes penetrate through the exhaust branch holes and extend into the corresponding caverns, the air supply fans correspond to the caverns in a one-to-one mode, the air supply fans are connected with second ventilation pipes communicating with the corresponding caverns, and the separation barriers are detachably installed at multiple positions in the caverns so as to separate the internal spaces of the caverns. According to the ventilation system, the ventilation effect can be improved, ventilation resources are accurately put, and energy waste is reduced.

The invention discloses a multi-scale composite greenbelt cooling structure and a construction method thereof, and the construction method comprises the following steps: constructing a ground surface cold storage layer composed of a permeable surface layer, a capillary cold storage layer and a cold source substrate layer to form a continuous evaporation cold source; an evapotranspiration enhanced vegetation layer of a vertical structure of arbor, shrub, grass and ground cover is configured to synergistically increase the air humidity and form a sparse ventilation passage; installing an air guide-shading composite layer with a gap type shading grating and adjustable air guide blades to attenuate radiation and guide airflow; an aerodynamic coupling structure comprising a vertical ventilation shaft and a horizontal ventilation gallery is constructed so as to collect and directionally convey cold air; the air guide blades and the humidification or water supply assembly are dynamically adjusted on the basis of environmental parameters so as to optimize cooperative operation, the corresponding system comprises all the layers and an intelligent control system which are in space coupling, and continuity, stability and adjustable output of the cooling effect in the limited green space are achieved through multi-mechanism space coupling and process collaboration.